> I was looking for a way to handle refreshes (user pressed refresh button)
> and found a piece of code to check if a Web page was refreshed but I can't
> get it to work.
>
> The code is:
> ************************************************************
> Namespace StevenBey.Web.UI
>
>  Public Class Page
>    Inherits System.Web.UI.Page
>    Private _refreshState As Boolean
>    Private _isRefresh As Boolean
>
>
>    Public ReadOnly Property IsRefresh() As Boolean
>     Get
>       Return _isRefresh
>     End Get
>    End Property
>
>
>    Protected Overrides Sub LoadViewState(savedState As Object)
>     Dim allStates As Object() = CType(savedState, Object())
>     MyBase.LoadViewState(allStates(0))
>     _refreshState = CBool(allStates(1))
>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>    End Sub 'LoadViewState
>
>
>    Protected Overrides Function SaveViewState() As Object
>     Session("__ISREFRESH") = _refreshState
>     Dim allStates(2) As Object
>     allStates(0) = MyBase.SaveViewState()
>     allStates(1) = Not _refreshState
>     Return allStates
>    End Function 'SaveViewState
>  End Class 'Page
>
> End NameSpace
> ************************************************************
>
> If I do a:
>
>   trace.warn("is Refresh = " & Page.IsRefresh)
>
> or
>
>   trace.warn("is Refresh = " & IsRefresh)
>
> I get the error:
>
>         BC30456 'IsRefresh' is not a member of 'System.Web.UI.Page'
>
> I took the compiled version (StevenBey.Web.UI.dll) and put it in my Bin
> directory.
>
> If you look at trace page you won't see __ISREFRESH?
>
> Is there something else I need to do to get this to work?
>
> Thanks,
>
> Tom

news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
> Hi Tom,
>
> see the remarks here made by a User:
>
> http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>
> this method seems to fail when back button is pressed. You can download
> a demo.
>
> Tommaso
>
> tshad ha scritto:
>
>> I was looking for a way to handle refreshes (user pressed refresh button)
>> and found a piece of code to check if a Web page was refreshed but I
>> can't
>> get it to work.
>>
>> The code is:
>> ************************************************************
>> Namespace StevenBey.Web.UI
>>
>>  Public Class Page
>>    Inherits System.Web.UI.Page
>>    Private _refreshState As Boolean
>>    Private _isRefresh As Boolean
>>
>>
>>    Public ReadOnly Property IsRefresh() As Boolean
>>     Get
>>       Return _isRefresh
>>     End Get
>>    End Property
>>
>>
>>    Protected Overrides Sub LoadViewState(savedState As Object)
>>     Dim allStates As Object() = CType(savedState, Object())
>>     MyBase.LoadViewState(allStates(0))
>>     _refreshState = CBool(allStates(1))
>>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>    End Sub 'LoadViewState
>>
>>
>>    Protected Overrides Function SaveViewState() As Object
>>     Session("__ISREFRESH") = _refreshState
>>     Dim allStates(2) As Object
>>     allStates(0) = MyBase.SaveViewState()
>>     allStates(1) = Not _refreshState
>>     Return allStates
>>    End Function 'SaveViewState
>>  End Class 'Page
>>
>> End NameSpace
>> ************************************************************
>>
>> If I do a:
>>
>>   trace.warn("is Refresh = " & Page.IsRefresh)
>>
>> or
>>
>>   trace.warn("is Refresh = " & IsRefresh)
>>
>> I get the error:
>>
>>         BC30456 'IsRefresh' is not a member of 'System.Web.UI.Page'
>>
>> I took the compiled version (StevenBey.Web.UI.dll) and put it in my Bin
>> directory.
>>
>> If you look at trace page you won't see __ISREFRESH?
>>
>> Is there something else I need to do to get this to work?
>>
>> Thanks,
>>
>> Tom
>

> I was able to get it to work after closer reading of the article.
>
> *******************************************************************
> Namespace MyFunctions
>
>  Public Class Page
>   Inherits System.Web.UI.Page
>   Private _refreshState As Boolean
>   Private _isRefresh As Boolean
>
>
>   Public ReadOnly Property IsRefresh() As Boolean
>    Get
>     Return _isRefresh
>    End Get
>   End Property
>
>
>   Protected Overrides Sub LoadViewState(savedState As Object)
>    Dim allStates As Object() = CType(savedState, Object())
>    MyBase.LoadViewState(allStates(0))
>    _refreshState = CBool(allStates(1))
>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>   End Sub 'LoadViewState
>
>
>   Protected Overrides Function SaveViewState() As Object
>    Session("__ISREFRESH") = _refreshState
>    Dim allStates(2) As Object
>    allStates(0) = MyBase.SaveViewState()
>    allStates(1) = Not _refreshState
>    Return allStates
>   End Function 'SaveViewState
>
>  End Class 'Page
>
> End NameSpace
> ***********************************************
>
> In my page, I have to add an inherits:
>
> <%@ Page Language="VB" trace="true" ContentType="text/html"
> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
> ...
> trace.warn("is Refresh = " & IsRefresh())
>
> Then it works.
>
> I am confused as to the code with the "allStates" and how it works.
>
> In LoadViewState:
>    Dim allStates As Object() = CType(savedState, Object())
>    MyBase.LoadViewState(allStates(0))
>    _refreshState = CBool(allStates(1))
>
> It seems to be getting the savedState from the parameters list, then I think
> it does the normal LoadViewState passing allStates(0) (which is really just
> savedState - so why not just pass savedState??).
>
> Also, what is allStates(1)?
>
> In SaveViewState:
>    Dim allStates(2) As Object
>    allStates(0) = MyBase.SaveViewState()
>    allStates(1) = Not _refreshState
>    Return allStates
>
> I assume the MyBase.SaveViewState() is just doing the normal SaveViewState
> and passes back the changed ViewState into allStates(0), what is
> allStates(1) and why are we passing back allStates - does this overwrite the
> ViewState that was written out by MyBase.SaveViewState()?
>
> Thanks,
>
> Tom
>
> <tommaso.gasta***@uniroma1.it> wrote in message
> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
> > Hi Tom,
> >
> > see the remarks here made by a User:
> >
> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
> >
> > this method seems to fail when back button is pressed. You can download
> > a demo.
> >
> > Tommaso
> >
> > tshad ha scritto:
> >
> >> I was looking for a way to handle refreshes (user pressed refresh button)
> >> and found a piece of code to check if a Web page was refreshed but I
> >> can't
> >> get it to work.
> >>
> >> The code is:
> >> ************************************************************
> >> Namespace StevenBey.Web.UI
> >>
> >>  Public Class Page
> >>    Inherits System.Web.UI.Page
> >>    Private _refreshState As Boolean
> >>    Private _isRefresh As Boolean
> >>
> >>
> >>    Public ReadOnly Property IsRefresh() As Boolean
> >>     Get
> >>       Return _isRefresh
> >>     End Get
> >>    End Property
> >>
> >>
> >>    Protected Overrides Sub LoadViewState(savedState As Object)
> >>     Dim allStates As Object() = CType(savedState, Object())
> >>     MyBase.LoadViewState(allStates(0))
> >>     _refreshState = CBool(allStates(1))
> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >>    End Sub 'LoadViewState
> >>
> >>
> >>    Protected Overrides Function SaveViewState() As Object
> >>     Session("__ISREFRESH") = _refreshState
> >>     Dim allStates(2) As Object
> >>     allStates(0) = MyBase.SaveViewState()
> >>     allStates(1) = Not _refreshState
> >>     Return allStates
> >>    End Function 'SaveViewState
> >>  End Class 'Page
> >>
> >> End NameSpace
> >> ************************************************************
> >>
> >> If I do a:
> >>
> >>   trace.warn("is Refresh = " & Page.IsRefresh)
> >>
> >> or
> >>
> >>   trace.warn("is Refresh = " & IsRefresh)
> >>
> >> I get the error:
> >>
> >>         BC30456 'IsRefresh' is not a member of 'System.Web.UI.Page'
> >>
> >> I took the compiled version (StevenBey.Web.UI.dll) and put it in my Bin
> >> directory.
> >>
> >> If you look at trace page you won't see __ISREFRESH?
> >>
> >> Is there something else I need to do to get this to work?
> >>
> >> Thanks,
> >>
> >> Tom
> >

>
> Tommaso
>
> tshad ha scritto:
>
>> I was able to get it to work after closer reading of the article.
>>
>> *******************************************************************
>> Namespace MyFunctions
>>
>>  Public Class Page
>>   Inherits System.Web.UI.Page
>>   Private _refreshState As Boolean
>>   Private _isRefresh As Boolean
>>
>>
>>   Public ReadOnly Property IsRefresh() As Boolean
>>    Get
>>     Return _isRefresh
>>    End Get
>>   End Property
>>
>>
>>   Protected Overrides Sub LoadViewState(savedState As Object)
>>    Dim allStates As Object() = CType(savedState, Object())
>>    MyBase.LoadViewState(allStates(0))
>>    _refreshState = CBool(allStates(1))
>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>   End Sub 'LoadViewState
>>
>>
>>   Protected Overrides Function SaveViewState() As Object
>>    Session("__ISREFRESH") = _refreshState
>>    Dim allStates(2) As Object
>>    allStates(0) = MyBase.SaveViewState()
>>    allStates(1) = Not _refreshState
>>    Return allStates
>>   End Function 'SaveViewState
>>
>>  End Class 'Page
>>
>> End NameSpace
>> ***********************************************
>>
>> In my page, I have to add an inherits:
>>
>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>> ...
>> trace.warn("is Refresh = " & IsRefresh())
>>
>> Then it works.
>>
>> I am confused as to the code with the "allStates" and how it works.
>>
>> In LoadViewState:
>>    Dim allStates As Object() = CType(savedState, Object())
>>    MyBase.LoadViewState(allStates(0))
>>    _refreshState = CBool(allStates(1))
>>
>> It seems to be getting the savedState from the parameters list, then I
>> think
>> it does the normal LoadViewState passing allStates(0) (which is really
>> just
>> savedState - so why not just pass savedState??).
>>
>> Also, what is allStates(1)?
>>
>> In SaveViewState:
>>    Dim allStates(2) As Object
>>    allStates(0) = MyBase.SaveViewState()
>>    allStates(1) = Not _refreshState
>>    Return allStates
>>
>> I assume the MyBase.SaveViewState() is just doing the normal
>> SaveViewState
>> and passes back the changed ViewState into allStates(0), what is
>> allStates(1) and why are we passing back allStates - does this overwrite
>> the
>> ViewState that was written out by MyBase.SaveViewState()?
>>
>> Thanks,
>>
>> Tom
>>
>> <tommaso.gasta***@uniroma1.it> wrote in message
>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>> > Hi Tom,
>> >
>> > see the remarks here made by a User:
>> >
>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>> >
>> > this method seems to fail when back button is pressed. You can download
>> > a demo.
>> >
>> > Tommaso
>> >
>> > tshad ha scritto:
>> >
>> >> I was looking for a way to handle refreshes (user pressed refresh
>> >> button)
>> >> and found a piece of code to check if a Web page was refreshed but I
>> >> can't
>> >> get it to work.
>> >>
>> >> The code is:
>> >> ************************************************************
>> >> Namespace StevenBey.Web.UI
>> >>
>> >>  Public Class Page
>> >>    Inherits System.Web.UI.Page
>> >>    Private _refreshState As Boolean
>> >>    Private _isRefresh As Boolean
>> >>
>> >>
>> >>    Public ReadOnly Property IsRefresh() As Boolean
>> >>     Get
>> >>       Return _isRefresh
>> >>     End Get
>> >>    End Property
>> >>
>> >>
>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
>> >>     Dim allStates As Object() = CType(savedState, Object())
>> >>     MyBase.LoadViewState(allStates(0))
>> >>     _refreshState = CBool(allStates(1))
>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >>    End Sub 'LoadViewState
>> >>
>> >>
>> >>    Protected Overrides Function SaveViewState() As Object
>> >>     Session("__ISREFRESH") = _refreshState
>> >>     Dim allStates(2) As Object
>> >>     allStates(0) = MyBase.SaveViewState()
>> >>     allStates(1) = Not _refreshState
>> >>     Return allStates
>> >>    End Function 'SaveViewState
>> >>  End Class 'Page
>> >>
>> >> End NameSpace
>> >> ************************************************************
>> >>
>> >> If I do a:
>> >>
>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>> >>
>> >> or
>> >>
>> >>   trace.warn("is Refresh = " & IsRefresh)
>> >>
>> >> I get the error:
>> >>
>> >>         BC30456 'IsRefresh' is not a member of 'System.Web.UI.Page'
>> >>
>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it in my
>> >> Bin
>> >> directory.
>> >>
>> >> If you look at trace page you won't see __ISREFRESH?
>> >>
>> >> Is there something else I need to do to get this to work?
>> >>
>> >> Thanks,
>> >>
>> >> Tom
>> >
>

> I know that that is also a problem and I am going to address that problem
> in a bit.  But I needed to get the refresh problem taken care of right
> away.
>
>>
>> The (almost) funny thing is that a guy has copied this article and
>> published it on Code Project site.
>> He also copied the bugs clearly ... :)
>
> I agree.
>
> But that allows someone else to at least get a starting point to work
> from.
>
> Tom
>
>>
>> Tommaso
>>
>> tshad ha scritto:
>>
>>> I was able to get it to work after closer reading of the article.
>>>
>>> *******************************************************************
>>> Namespace MyFunctions
>>>
>>>  Public Class Page
>>>   Inherits System.Web.UI.Page
>>>   Private _refreshState As Boolean
>>>   Private _isRefresh As Boolean
>>>
>>>
>>>   Public ReadOnly Property IsRefresh() As Boolean
>>>    Get
>>>     Return _isRefresh
>>>    End Get
>>>   End Property
>>>
>>>
>>>   Protected Overrides Sub LoadViewState(savedState As Object)
>>>    Dim allStates As Object() = CType(savedState, Object())
>>>    MyBase.LoadViewState(allStates(0))
>>>    _refreshState = CBool(allStates(1))
>>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>>   End Sub 'LoadViewState
>>>
>>>
>>>   Protected Overrides Function SaveViewState() As Object
>>>    Session("__ISREFRESH") = _refreshState
>>>    Dim allStates(2) As Object
>>>    allStates(0) = MyBase.SaveViewState()
>>>    allStates(1) = Not _refreshState
>>>    Return allStates
>>>   End Function 'SaveViewState
>>>
>>>  End Class 'Page
>>>
>>> End NameSpace
>>> ***********************************************
>>>
>>> In my page, I have to add an inherits:
>>>
>>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>>> ...
>>> trace.warn("is Refresh = " & IsRefresh())
>>>
>>> Then it works.
>>>
>>> I am confused as to the code with the "allStates" and how it works.
>>>
>>> In LoadViewState:
>>>    Dim allStates As Object() = CType(savedState, Object())
>>>    MyBase.LoadViewState(allStates(0))
>>>    _refreshState = CBool(allStates(1))
>>>
>>> It seems to be getting the savedState from the parameters list, then I
>>> think
>>> it does the normal LoadViewState passing allStates(0) (which is really
>>> just
>>> savedState - so why not just pass savedState??).
>>>
>>> Also, what is allStates(1)?
>>>
>>> In SaveViewState:
>>>    Dim allStates(2) As Object
>>>    allStates(0) = MyBase.SaveViewState()
>>>    allStates(1) = Not _refreshState
>>>    Return allStates
>>>
>>> I assume the MyBase.SaveViewState() is just doing the normal
>>> SaveViewState
>>> and passes back the changed ViewState into allStates(0), what is
>>> allStates(1) and why are we passing back allStates - does this overwrite
>>> the
>>> ViewState that was written out by MyBase.SaveViewState()?
>>>
>>> Thanks,
>>>
>>> Tom
>>>
>>> <tommaso.gasta***@uniroma1.it> wrote in message
>>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>>> > Hi Tom,
>>> >
>>> > see the remarks here made by a User:
>>> >
>>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>>> >
>>> > this method seems to fail when back button is pressed. You can
>>> > download
>>> > a demo.
>>> >
>>> > Tommaso
>>> >
>>> > tshad ha scritto:
>>> >
>>> >> I was looking for a way to handle refreshes (user pressed refresh
>>> >> button)
>>> >> and found a piece of code to check if a Web page was refreshed but I
>>> >> can't
>>> >> get it to work.
>>> >>
>>> >> The code is:
>>> >> ************************************************************
>>> >> Namespace StevenBey.Web.UI
>>> >>
>>> >>  Public Class Page
>>> >>    Inherits System.Web.UI.Page
>>> >>    Private _refreshState As Boolean
>>> >>    Private _isRefresh As Boolean
>>> >>
>>> >>
>>> >>    Public ReadOnly Property IsRefresh() As Boolean
>>> >>     Get
>>> >>       Return _isRefresh
>>> >>     End Get
>>> >>    End Property
>>> >>
>>> >>
>>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
>>> >>     Dim allStates As Object() = CType(savedState, Object())
>>> >>     MyBase.LoadViewState(allStates(0))
>>> >>     _refreshState = CBool(allStates(1))
>>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>> >>    End Sub 'LoadViewState
>>> >>
>>> >>
>>> >>    Protected Overrides Function SaveViewState() As Object
>>> >>     Session("__ISREFRESH") = _refreshState
>>> >>     Dim allStates(2) As Object
>>> >>     allStates(0) = MyBase.SaveViewState()
>>> >>     allStates(1) = Not _refreshState
>>> >>     Return allStates
>>> >>    End Function 'SaveViewState
>>> >>  End Class 'Page
>>> >>
>>> >> End NameSpace
>>> >> ************************************************************
>>> >>
>>> >> If I do a:
>>> >>
>>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>>> >>
>>> >> or
>>> >>
>>> >>   trace.warn("is Refresh = " & IsRefresh)
>>> >>
>>> >> I get the error:
>>> >>
>>> >>         BC30456 'IsRefresh' is not a member of 'System.Web.UI.Page'
>>> >>
>>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it in my
>>> >> Bin
>>> >> directory.
>>> >>
>>> >> If you look at trace page you won't see __ISREFRESH?
>>> >>
>>> >> Is there something else I need to do to get this to work?
>>> >>
>>> >> Thanks,
>>> >>
>>> >> Tom
>>> >
>>
>
>

> "tshad" <tscheider***@ftsolutions.com> wrote in message
> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
> > <tommaso.gasta***@uniroma1.it> wrote in message
> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
> >> But what about the back button problem.
> >> I think that user was right. It doesn't work in that case.
> >
>
> Actually, I did some work with the program and found that it also doesn't
> work on the inital page.  It only works for PostBacks.
>
> Looking into it I found that since LoadViewState is not called on an initial
> page load (makes sense as there would be no ViewState saved here), there is
> nothing to test.
>
> I need to find some other way to make it work or find a way to find out if
> the initial page.
>
> Tom
>
> > I know that that is also a problem and I am going to address that problem
> > in a bit.  But I needed to get the refresh problem taken care of right
> > away.
> >
> >>
> >> The (almost) funny thing is that a guy has copied this article and
> >> published it on Code Project site.
> >> He also copied the bugs clearly ... :)
> >
> > I agree.
> >
> > But that allows someone else to at least get a starting point to work
> > from.
> >
> > Tom
> >
> >>
> >> Tommaso
> >>
> >> tshad ha scritto:
> >>
> >>> I was able to get it to work after closer reading of the article.
> >>>
> >>> *******************************************************************
> >>> Namespace MyFunctions
> >>>
> >>>  Public Class Page
> >>>   Inherits System.Web.UI.Page
> >>>   Private _refreshState As Boolean
> >>>   Private _isRefresh As Boolean
> >>>
> >>>
> >>>   Public ReadOnly Property IsRefresh() As Boolean
> >>>    Get
> >>>     Return _isRefresh
> >>>    End Get
> >>>   End Property
> >>>
> >>>
> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
> >>>    Dim allStates As Object() = CType(savedState, Object())
> >>>    MyBase.LoadViewState(allStates(0))
> >>>    _refreshState = CBool(allStates(1))
> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >>>   End Sub 'LoadViewState
> >>>
> >>>
> >>>   Protected Overrides Function SaveViewState() As Object
> >>>    Session("__ISREFRESH") = _refreshState
> >>>    Dim allStates(2) As Object
> >>>    allStates(0) = MyBase.SaveViewState()
> >>>    allStates(1) = Not _refreshState
> >>>    Return allStates
> >>>   End Function 'SaveViewState
> >>>
> >>>  End Class 'Page
> >>>
> >>> End NameSpace
> >>> ***********************************************
> >>>
> >>> In my page, I have to add an inherits:
> >>>
> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
> >>> ...
> >>> trace.warn("is Refresh = " & IsRefresh())
> >>>
> >>> Then it works.
> >>>
> >>> I am confused as to the code with the "allStates" and how it works.
> >>>
> >>> In LoadViewState:
> >>>    Dim allStates As Object() = CType(savedState, Object())
> >>>    MyBase.LoadViewState(allStates(0))
> >>>    _refreshState = CBool(allStates(1))
> >>>
> >>> It seems to be getting the savedState from the parameters list, then I
> >>> think
> >>> it does the normal LoadViewState passing allStates(0) (which is really
> >>> just
> >>> savedState - so why not just pass savedState??).
> >>>
> >>> Also, what is allStates(1)?
> >>>
> >>> In SaveViewState:
> >>>    Dim allStates(2) As Object
> >>>    allStates(0) = MyBase.SaveViewState()
> >>>    allStates(1) = Not _refreshState
> >>>    Return allStates
> >>>
> >>> I assume the MyBase.SaveViewState() is just doing the normal
> >>> SaveViewState
> >>> and passes back the changed ViewState into allStates(0), what is
> >>> allStates(1) and why are we passing back allStates - does this overwrite
> >>> the
> >>> ViewState that was written out by MyBase.SaveViewState()?
> >>>
> >>> Thanks,
> >>>
> >>> Tom
> >>>
> >>> <tommaso.gasta***@uniroma1.it> wrote in message
> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
> >>> > Hi Tom,
> >>> >
> >>> > see the remarks here made by a User:
> >>> >
> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
> >>> >
> >>> > this method seems to fail when back button is pressed. You can
> >>> > download
> >>> > a demo.
> >>> >
> >>> > Tommaso
> >>> >
> >>> > tshad ha scritto:
> >>> >
> >>> >> I was looking for a way to handle refreshes (user pressed refresh
> >>> >> button)
> >>> >> and found a piece of code to check if a Web page was refreshed but I
> >>> >> can't
> >>> >> get it to work.
> >>> >>
> >>> >> The code is:
> >>> >> ************************************************************
> >>> >> Namespace StevenBey.Web.UI
> >>> >>
> >>> >>  Public Class Page
> >>> >>    Inherits System.Web.UI.Page
> >>> >>    Private _refreshState As Boolean
> >>> >>    Private _isRefresh As Boolean
> >>> >>
> >>> >>
> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
> >>> >>     Get
> >>> >>       Return _isRefresh
> >>> >>     End Get
> >>> >>    End Property
> >>> >>
> >>> >>
> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
> >>> >>     Dim allStates As Object() = CType(savedState, Object())
> >>> >>     MyBase.LoadViewState(allStates(0))
> >>> >>     _refreshState = CBool(allStates(1))
> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >>> >>    End Sub 'LoadViewState
> >>> >>
> >>> >>
> >>> >>    Protected Overrides Function SaveViewState() As Object
> >>> >>     Session("__ISREFRESH") = _refreshState
> >>> >>     Dim allStates(2) As Object
> >>> >>     allStates(0) = MyBase.SaveViewState()
> >>> >>     allStates(1) = Not _refreshState
> >>> >>     Return allStates
> >>> >>    End Function 'SaveViewState
> >>> >>  End Class 'Page
> >>> >>
> >>> >> End NameSpace
> >>> >> ************************************************************
> >>> >>
> >>> >> If I do a:
> >>> >>
> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
> >>> >>
> >>> >> or
> >>> >>
> >>> >>   trace.warn("is Refresh = " & IsRefresh)
> >>> >>
> >>> >> I get the error:
> >>> >>
> >>> >>         BC30456 'IsRefresh' is not a member of 'System.Web.UI.Page'
> >>> >>
> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it in my
> >>> >> Bin
> >>> >> directory.
> >>> >>
> >>> >> If you look at trace page you won't see __ISREFRESH?
> >>> >>
> >>> >> Is there something else I need to do to get this to work?
> >>> >>
> >>> >> Thanks,
> >>> >>
> >>> >> Tom
> >>> >
> >>
> >
> >

>
> Let us know about the best solution... :)
>
> Tommaso
>
> tshad ha scritto:
>
>> "tshad" <tscheider***@ftsolutions.com> wrote in message
>> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
>> > <tommaso.gasta***@uniroma1.it> wrote in message
>> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
>> >> But what about the back button problem.
>> >> I think that user was right. It doesn't work in that case.
>> >
>>
>> Actually, I did some work with the program and found that it also doesn't
>> work on the inital page.  It only works for PostBacks.
>>
>> Looking into it I found that since LoadViewState is not called on an
>> initial
>> page load (makes sense as there would be no ViewState saved here), there
>> is
>> nothing to test.
>>
>> I need to find some other way to make it work or find a way to find out
>> if
>> the initial page.
>>
>> Tom
>>
>> > I know that that is also a problem and I am going to address that
>> > problem
>> > in a bit.  But I needed to get the refresh problem taken care of right
>> > away.
>> >
>> >>
>> >> The (almost) funny thing is that a guy has copied this article and
>> >> published it on Code Project site.
>> >> He also copied the bugs clearly ... :)
>> >
>> > I agree.
>> >
>> > But that allows someone else to at least get a starting point to work
>> > from.
>> >
>> > Tom
>> >
>> >>
>> >> Tommaso
>> >>
>> >> tshad ha scritto:
>> >>
>> >>> I was able to get it to work after closer reading of the article.
>> >>>
>> >>> *******************************************************************
>> >>> Namespace MyFunctions
>> >>>
>> >>>  Public Class Page
>> >>>   Inherits System.Web.UI.Page
>> >>>   Private _refreshState As Boolean
>> >>>   Private _isRefresh As Boolean
>> >>>
>> >>>
>> >>>   Public ReadOnly Property IsRefresh() As Boolean
>> >>>    Get
>> >>>     Return _isRefresh
>> >>>    End Get
>> >>>   End Property
>> >>>
>> >>>
>> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
>> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >>>    MyBase.LoadViewState(allStates(0))
>> >>>    _refreshState = CBool(allStates(1))
>> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >>>   End Sub 'LoadViewState
>> >>>
>> >>>
>> >>>   Protected Overrides Function SaveViewState() As Object
>> >>>    Session("__ISREFRESH") = _refreshState
>> >>>    Dim allStates(2) As Object
>> >>>    allStates(0) = MyBase.SaveViewState()
>> >>>    allStates(1) = Not _refreshState
>> >>>    Return allStates
>> >>>   End Function 'SaveViewState
>> >>>
>> >>>  End Class 'Page
>> >>>
>> >>> End NameSpace
>> >>> ***********************************************
>> >>>
>> >>> In my page, I have to add an inherits:
>> >>>
>> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>> >>> ...
>> >>> trace.warn("is Refresh = " & IsRefresh())
>> >>>
>> >>> Then it works.
>> >>>
>> >>> I am confused as to the code with the "allStates" and how it works.
>> >>>
>> >>> In LoadViewState:
>> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >>>    MyBase.LoadViewState(allStates(0))
>> >>>    _refreshState = CBool(allStates(1))
>> >>>
>> >>> It seems to be getting the savedState from the parameters list, then
>> >>> I
>> >>> think
>> >>> it does the normal LoadViewState passing allStates(0) (which is
>> >>> really
>> >>> just
>> >>> savedState - so why not just pass savedState??).
>> >>>
>> >>> Also, what is allStates(1)?
>> >>>
>> >>> In SaveViewState:
>> >>>    Dim allStates(2) As Object
>> >>>    allStates(0) = MyBase.SaveViewState()
>> >>>    allStates(1) = Not _refreshState
>> >>>    Return allStates
>> >>>
>> >>> I assume the MyBase.SaveViewState() is just doing the normal
>> >>> SaveViewState
>> >>> and passes back the changed ViewState into allStates(0), what is
>> >>> allStates(1) and why are we passing back allStates - does this
>> >>> overwrite
>> >>> the
>> >>> ViewState that was written out by MyBase.SaveViewState()?
>> >>>
>> >>> Thanks,
>> >>>
>> >>> Tom
>> >>>
>> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>> >>> > Hi Tom,
>> >>> >
>> >>> > see the remarks here made by a User:
>> >>> >
>> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>> >>> >
>> >>> > this method seems to fail when back button is pressed. You can
>> >>> > download
>> >>> > a demo.
>> >>> >
>> >>> > Tommaso
>> >>> >
>> >>> > tshad ha scritto:
>> >>> >
>> >>> >> I was looking for a way to handle refreshes (user pressed refresh
>> >>> >> button)
>> >>> >> and found a piece of code to check if a Web page was refreshed but
>> >>> >> I
>> >>> >> can't
>> >>> >> get it to work.
>> >>> >>
>> >>> >> The code is:
>> >>> >> ************************************************************
>> >>> >> Namespace StevenBey.Web.UI
>> >>> >>
>> >>> >>  Public Class Page
>> >>> >>    Inherits System.Web.UI.Page
>> >>> >>    Private _refreshState As Boolean
>> >>> >>    Private _isRefresh As Boolean
>> >>> >>
>> >>> >>
>> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
>> >>> >>     Get
>> >>> >>       Return _isRefresh
>> >>> >>     End Get
>> >>> >>    End Property
>> >>> >>
>> >>> >>
>> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
>> >>> >>     Dim allStates As Object() = CType(savedState, Object())
>> >>> >>     MyBase.LoadViewState(allStates(0))
>> >>> >>     _refreshState = CBool(allStates(1))
>> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >>> >>    End Sub 'LoadViewState
>> >>> >>
>> >>> >>
>> >>> >>    Protected Overrides Function SaveViewState() As Object
>> >>> >>     Session("__ISREFRESH") = _refreshState
>> >>> >>     Dim allStates(2) As Object
>> >>> >>     allStates(0) = MyBase.SaveViewState()
>> >>> >>     allStates(1) = Not _refreshState
>> >>> >>     Return allStates
>> >>> >>    End Function 'SaveViewState
>> >>> >>  End Class 'Page
>> >>> >>
>> >>> >> End NameSpace
>> >>> >> ************************************************************
>> >>> >>
>> >>> >> If I do a:
>> >>> >>
>> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>> >>> >>
>> >>> >> or
>> >>> >>
>> >>> >>   trace.warn("is Refresh = " & IsRefresh)
>> >>> >>
>> >>> >> I get the error:
>> >>> >>
>> >>> >>         BC30456 'IsRefresh' is not a member of
>> >>> >> 'System.Web.UI.Page'
>> >>> >>
>> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it in
>> >>> >> my
>> >>> >> Bin
>> >>> >> directory.
>> >>> >>
>> >>> >> If you look at trace page you won't see __ISREFRESH?
>> >>> >>
>> >>> >> Is there something else I need to do to get this to work?
>> >>> >>
>> >>> >> Thanks,
>> >>> >>
>> >>> >> Tom
>> >>> >
>> >>
>> >
>> >
>

> <tommaso.gasta***@uniroma1.it> wrote in message
> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
> > Hi Tom,
> >
> > I am afraid that is not exactly an "elementary" topic. Here is a more
> > authoritative source:
> >
> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
>
> I looked there, but the article is about Script Callbacks.
>
> That was interesting also, as I was looking at doing this (like Ajax) but in
> .net.
>
> I knew you could do this in .net 1.1, but if what this is saying is correct
> then I can't do it.
>
> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based on the
> services of a COM object that ships with Internet Explorer 5.0 and later. By
> using the same object, you can implement a script callback mechanism in
> ASP.NET 1.x as well"
>
> I don't want to do it if you have to depend on the user using IE.
>
> Thanks,
>
> Tom
>
> >
> > Let us know about the best solution... :)
> >
> > Tommaso
> >
> > tshad ha scritto:
> >
> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
> >> > <tommaso.gasta***@uniroma1.it> wrote in message
> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
> >> >> But what about the back button problem.
> >> >> I think that user was right. It doesn't work in that case.
> >> >
> >>
> >> Actually, I did some work with the program and found that it also doesn't
> >> work on the inital page.  It only works for PostBacks.
> >>
> >> Looking into it I found that since LoadViewState is not called on an
> >> initial
> >> page load (makes sense as there would be no ViewState saved here), there
> >> is
> >> nothing to test.
> >>
> >> I need to find some other way to make it work or find a way to find out
> >> if
> >> the initial page.
> >>
> >> Tom
> >>
> >> > I know that that is also a problem and I am going to address that
> >> > problem
> >> > in a bit.  But I needed to get the refresh problem taken care of right
> >> > away.
> >> >
> >> >>
> >> >> The (almost) funny thing is that a guy has copied this article and
> >> >> published it on Code Project site.
> >> >> He also copied the bugs clearly ... :)
> >> >
> >> > I agree.
> >> >
> >> > But that allows someone else to at least get a starting point to work
> >> > from.
> >> >
> >> > Tom
> >> >
> >> >>
> >> >> Tommaso
> >> >>
> >> >> tshad ha scritto:
> >> >>
> >> >>> I was able to get it to work after closer reading of the article.
> >> >>>
> >> >>> *******************************************************************
> >> >>> Namespace MyFunctions
> >> >>>
> >> >>>  Public Class Page
> >> >>>   Inherits System.Web.UI.Page
> >> >>>   Private _refreshState As Boolean
> >> >>>   Private _isRefresh As Boolean
> >> >>>
> >> >>>
> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
> >> >>>    Get
> >> >>>     Return _isRefresh
> >> >>>    End Get
> >> >>>   End Property
> >> >>>
> >> >>>
> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
> >> >>>    Dim allStates As Object() = CType(savedState, Object())
> >> >>>    MyBase.LoadViewState(allStates(0))
> >> >>>    _refreshState = CBool(allStates(1))
> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >> >>>   End Sub 'LoadViewState
> >> >>>
> >> >>>
> >> >>>   Protected Overrides Function SaveViewState() As Object
> >> >>>    Session("__ISREFRESH") = _refreshState
> >> >>>    Dim allStates(2) As Object
> >> >>>    allStates(0) = MyBase.SaveViewState()
> >> >>>    allStates(1) = Not _refreshState
> >> >>>    Return allStates
> >> >>>   End Function 'SaveViewState
> >> >>>
> >> >>>  End Class 'Page
> >> >>>
> >> >>> End NameSpace
> >> >>> ***********************************************
> >> >>>
> >> >>> In my page, I have to add an inherits:
> >> >>>
> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
> >> >>> ...
> >> >>> trace.warn("is Refresh = " & IsRefresh())
> >> >>>
> >> >>> Then it works.
> >> >>>
> >> >>> I am confused as to the code with the "allStates" and how it works.
> >> >>>
> >> >>> In LoadViewState:
> >> >>>    Dim allStates As Object() = CType(savedState, Object())
> >> >>>    MyBase.LoadViewState(allStates(0))
> >> >>>    _refreshState = CBool(allStates(1))
> >> >>>
> >> >>> It seems to be getting the savedState from the parameters list, then
> >> >>> I
> >> >>> think
> >> >>> it does the normal LoadViewState passing allStates(0) (which is
> >> >>> really
> >> >>> just
> >> >>> savedState - so why not just pass savedState??).
> >> >>>
> >> >>> Also, what is allStates(1)?
> >> >>>
> >> >>> In SaveViewState:
> >> >>>    Dim allStates(2) As Object
> >> >>>    allStates(0) = MyBase.SaveViewState()
> >> >>>    allStates(1) = Not _refreshState
> >> >>>    Return allStates
> >> >>>
> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
> >> >>> SaveViewState
> >> >>> and passes back the changed ViewState into allStates(0), what is
> >> >>> allStates(1) and why are we passing back allStates - does this
> >> >>> overwrite
> >> >>> the
> >> >>> ViewState that was written out by MyBase.SaveViewState()?
> >> >>>
> >> >>> Thanks,
> >> >>>
> >> >>> Tom
> >> >>>
> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
> >> >>> > Hi Tom,
> >> >>> >
> >> >>> > see the remarks here made by a User:
> >> >>> >
> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
> >> >>> >
> >> >>> > this method seems to fail when back button is pressed. You can
> >> >>> > download
> >> >>> > a demo.
> >> >>> >
> >> >>> > Tommaso
> >> >>> >
> >> >>> > tshad ha scritto:
> >> >>> >
> >> >>> >> I was looking for a way to handle refreshes (user pressed refresh
> >> >>> >> button)
> >> >>> >> and found a piece of code to check if a Web page was refreshed but
> >> >>> >> I
> >> >>> >> can't
> >> >>> >> get it to work.
> >> >>> >>
> >> >>> >> The code is:
> >> >>> >> ************************************************************
> >> >>> >> Namespace StevenBey.Web.UI
> >> >>> >>
> >> >>> >>  Public Class Page
> >> >>> >>    Inherits System.Web.UI.Page
> >> >>> >>    Private _refreshState As Boolean
> >> >>> >>    Private _isRefresh As Boolean
> >> >>> >>
> >> >>> >>
> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
> >> >>> >>     Get
> >> >>> >>       Return _isRefresh
> >> >>> >>     End Get
> >> >>> >>    End Property
> >> >>> >>
> >> >>> >>
> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
> >> >>> >>     MyBase.LoadViewState(allStates(0))
> >> >>> >>     _refreshState = CBool(allStates(1))
> >> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >> >>> >>    End Sub 'LoadViewState
> >> >>> >>
> >> >>> >>
> >> >>> >>    Protected Overrides Function SaveViewState() As Object
> >> >>> >>     Session("__ISREFRESH") = _refreshState
> >> >>> >>     Dim allStates(2) As Object
> >> >>> >>     allStates(0) = MyBase.SaveViewState()
> >> >>> >>     allStates(1) = Not _refreshState
> >> >>> >>     Return allStates
> >> >>> >>    End Function 'SaveViewState
> >> >>> >>  End Class 'Page
> >> >>> >>
> >> >>> >> End NameSpace
> >> >>> >> ************************************************************
> >> >>> >>
> >> >>> >> If I do a:
> >> >>> >>
> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
> >> >>> >>
> >> >>> >> or
> >> >>> >>
> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
> >> >>> >>
> >> >>> >> I get the error:
> >> >>> >>
> >> >>> >>         BC30456 'IsRefresh' is not a member of
> >> >>> >> 'System.Web.UI.Page'
> >> >>> >>
> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it in
> >> >>> >> my
> >> >>> >> Bin
> >> >>> >> directory.
> >> >>> >>
> >> >>> >> If you look at trace page you won't see __ISREFRESH?
> >> >>> >>
> >> >>> >> Is there something else I need to do to get this to work?
> >> >>> >>
> >> >>> >> Thanks,
> >> >>> >>
> >> >>> >> Tom
> >> >>> >
> >> >>
> >> >
> >> >
> >

>
> Let me know if you find a definitive solution...
>
> Tommaso
>
> tshad ha scritto:
>
>> <tommaso.gasta***@uniroma1.it> wrote in message
>> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
>> > Hi Tom,
>> >
>> > I am afraid that is not exactly an "elementary" topic. Here is a more
>> > authoritative source:
>> >
>> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
>>
>> I looked there, but the article is about Script Callbacks.
>>
>> That was interesting also, as I was looking at doing this (like Ajax) but
>> in
>> .net.
>>
>> I knew you could do this in .net 1.1, but if what this is saying is
>> correct
>> then I can't do it.
>>
>> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based on
>> the
>> services of a COM object that ships with Internet Explorer 5.0 and later.
>> By
>> using the same object, you can implement a script callback mechanism in
>> ASP.NET 1.x as well"
>>
>> I don't want to do it if you have to depend on the user using IE.
>>
>> Thanks,
>>
>> Tom
>>
>> >
>> > Let us know about the best solution... :)
>> >
>> > Tommaso
>> >
>> > tshad ha scritto:
>> >
>> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
>> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
>> >> > <tommaso.gasta***@uniroma1.it> wrote in message
>> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
>> >> >> But what about the back button problem.
>> >> >> I think that user was right. It doesn't work in that case.
>> >> >
>> >>
>> >> Actually, I did some work with the program and found that it also
>> >> doesn't
>> >> work on the inital page.  It only works for PostBacks.
>> >>
>> >> Looking into it I found that since LoadViewState is not called on an
>> >> initial
>> >> page load (makes sense as there would be no ViewState saved here),
>> >> there
>> >> is
>> >> nothing to test.
>> >>
>> >> I need to find some other way to make it work or find a way to find
>> >> out
>> >> if
>> >> the initial page.
>> >>
>> >> Tom
>> >>
>> >> > I know that that is also a problem and I am going to address that
>> >> > problem
>> >> > in a bit.  But I needed to get the refresh problem taken care of
>> >> > right
>> >> > away.
>> >> >
>> >> >>
>> >> >> The (almost) funny thing is that a guy has copied this article and
>> >> >> published it on Code Project site.
>> >> >> He also copied the bugs clearly ... :)
>> >> >
>> >> > I agree.
>> >> >
>> >> > But that allows someone else to at least get a starting point to
>> >> > work
>> >> > from.
>> >> >
>> >> > Tom
>> >> >
>> >> >>
>> >> >> Tommaso
>> >> >>
>> >> >> tshad ha scritto:
>> >> >>
>> >> >>> I was able to get it to work after closer reading of the article.
>> >> >>>
>> >> >>> *******************************************************************
>> >> >>> Namespace MyFunctions
>> >> >>>
>> >> >>>  Public Class Page
>> >> >>>   Inherits System.Web.UI.Page
>> >> >>>   Private _refreshState As Boolean
>> >> >>>   Private _isRefresh As Boolean
>> >> >>>
>> >> >>>
>> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
>> >> >>>    Get
>> >> >>>     Return _isRefresh
>> >> >>>    End Get
>> >> >>>   End Property
>> >> >>>
>> >> >>>
>> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >> >>>    MyBase.LoadViewState(allStates(0))
>> >> >>>    _refreshState = CBool(allStates(1))
>> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >> >>>   End Sub 'LoadViewState
>> >> >>>
>> >> >>>
>> >> >>>   Protected Overrides Function SaveViewState() As Object
>> >> >>>    Session("__ISREFRESH") = _refreshState
>> >> >>>    Dim allStates(2) As Object
>> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >> >>>    allStates(1) = Not _refreshState
>> >> >>>    Return allStates
>> >> >>>   End Function 'SaveViewState
>> >> >>>
>> >> >>>  End Class 'Page
>> >> >>>
>> >> >>> End NameSpace
>> >> >>> ***********************************************
>> >> >>>
>> >> >>> In my page, I have to add an inherits:
>> >> >>>
>> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>> >> >>> ...
>> >> >>> trace.warn("is Refresh = " & IsRefresh())
>> >> >>>
>> >> >>> Then it works.
>> >> >>>
>> >> >>> I am confused as to the code with the "allStates" and how it
>> >> >>> works.
>> >> >>>
>> >> >>> In LoadViewState:
>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >> >>>    MyBase.LoadViewState(allStates(0))
>> >> >>>    _refreshState = CBool(allStates(1))
>> >> >>>
>> >> >>> It seems to be getting the savedState from the parameters list,
>> >> >>> then
>> >> >>> I
>> >> >>> think
>> >> >>> it does the normal LoadViewState passing allStates(0) (which is
>> >> >>> really
>> >> >>> just
>> >> >>> savedState - so why not just pass savedState??).
>> >> >>>
>> >> >>> Also, what is allStates(1)?
>> >> >>>
>> >> >>> In SaveViewState:
>> >> >>>    Dim allStates(2) As Object
>> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >> >>>    allStates(1) = Not _refreshState
>> >> >>>    Return allStates
>> >> >>>
>> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
>> >> >>> SaveViewState
>> >> >>> and passes back the changed ViewState into allStates(0), what is
>> >> >>> allStates(1) and why are we passing back allStates - does this
>> >> >>> overwrite
>> >> >>> the
>> >> >>> ViewState that was written out by MyBase.SaveViewState()?
>> >> >>>
>> >> >>> Thanks,
>> >> >>>
>> >> >>> Tom
>> >> >>>
>> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>> >> >>> > Hi Tom,
>> >> >>> >
>> >> >>> > see the remarks here made by a User:
>> >> >>> >
>> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>> >> >>> >
>> >> >>> > this method seems to fail when back button is pressed. You can
>> >> >>> > download
>> >> >>> > a demo.
>> >> >>> >
>> >> >>> > Tommaso
>> >> >>> >
>> >> >>> > tshad ha scritto:
>> >> >>> >
>> >> >>> >> I was looking for a way to handle refreshes (user pressed
>> >> >>> >> refresh
>> >> >>> >> button)
>> >> >>> >> and found a piece of code to check if a Web page was refreshed
>> >> >>> >> but
>> >> >>> >> I
>> >> >>> >> can't
>> >> >>> >> get it to work.
>> >> >>> >>
>> >> >>> >> The code is:
>> >> >>> >> ************************************************************
>> >> >>> >> Namespace StevenBey.Web.UI
>> >> >>> >>
>> >> >>> >>  Public Class Page
>> >> >>> >>    Inherits System.Web.UI.Page
>> >> >>> >>    Private _refreshState As Boolean
>> >> >>> >>    Private _isRefresh As Boolean
>> >> >>> >>
>> >> >>> >>
>> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
>> >> >>> >>     Get
>> >> >>> >>       Return _isRefresh
>> >> >>> >>     End Get
>> >> >>> >>    End Property
>> >> >>> >>
>> >> >>> >>
>> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
>> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
>> >> >>> >>     MyBase.LoadViewState(allStates(0))
>> >> >>> >>     _refreshState = CBool(allStates(1))
>> >> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >> >>> >>    End Sub 'LoadViewState
>> >> >>> >>
>> >> >>> >>
>> >> >>> >>    Protected Overrides Function SaveViewState() As Object
>> >> >>> >>     Session("__ISREFRESH") = _refreshState
>> >> >>> >>     Dim allStates(2) As Object
>> >> >>> >>     allStates(0) = MyBase.SaveViewState()
>> >> >>> >>     allStates(1) = Not _refreshState
>> >> >>> >>     Return allStates
>> >> >>> >>    End Function 'SaveViewState
>> >> >>> >>  End Class 'Page
>> >> >>> >>
>> >> >>> >> End NameSpace
>> >> >>> >> ************************************************************
>> >> >>> >>
>> >> >>> >> If I do a:
>> >> >>> >>
>> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>> >> >>> >>
>> >> >>> >> or
>> >> >>> >>
>> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
>> >> >>> >>
>> >> >>> >> I get the error:
>> >> >>> >>
>> >> >>> >>         BC30456 'IsRefresh' is not a member of
>> >> >>> >> 'System.Web.UI.Page'
>> >> >>> >>
>> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it
>> >> >>> >> in
>> >> >>> >> my
>> >> >>> >> Bin
>> >> >>> >> directory.
>> >> >>> >>
>> >> >>> >> If you look at trace page you won't see __ISREFRESH?
>> >> >>> >>
>> >> >>> >> Is there something else I need to do to get this to work?
>> >> >>> >>
>> >> >>> >> Thanks,
>> >> >>> >>
>> >> >>> >> Tom
>> >> >>> >
>> >> >>
>> >> >
>> >> >
>> >
>

"tshad" <tscheider***@ftsolutions.com> wrote in message
news:OB0zkD%23xGHA.4204@TK2MSFTNGP04.phx.gbl...
> <tommaso.gasta***@uniroma1.it> wrote in message
> news:1156464254.543709.314580@h48g2000cwc.googlegroups.com...
>> Hi Tom,
>>
>> I posted the wrong link. Here it is:
>>
>> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvs05/html/bedrockaspnet.asp
>>
> I'll take a look at that to see what it says.
>
>> "Trap the Browser Refresh
>> In an article originally published on aspnetPRO Magazine several months
>> ago, I outlined the steps needed to detect when the user presses the F5
>> browser button to refresh the current page. The page refresh is the
>> browser's response to a specific user action-hitting the F5 key or
>> clicking the  toolbar button. The page refresh action is a sort of
>> internal browser operation, for which the browser doesn't provide any
>> external notification
>>
>> see also:
>> http://www.joel.net/code/refresh_capture.aspx
>
> Already looking at this one.
>
> I am looking at using ideas from his code to solve the problem from my
> program dealing with the LoadViewState on the initial load problem.
>
> I did find another problem that I didn't notice before with my code.  I
> didn't notice that my SaveViewState is being executed twice and I don't
> know why.  I put a trace statement in the function and found that it is
> being called before the normal SaveViewState and during the SaveViewState.
>
>      aspx.page Begin Init
>      aspx.page End Init 0.000079 0.000079
>      aspx.page Begin PreRender 0.000116 0.000037
>      aspx.page End PreRender 0.000165 0.000049
>     Inside refresh.cs at SaveViewState 0.000880 0.000715
>      aspx.page Begin SaveViewState 0.001932 0.001053
>     Inside refresh.cs at SaveViewState 0.002330 0.000398
>      aspx.page End SaveViewState 0.002384 0.000054
>      aspx.page Begin Render 0.002411 0.000027
>      aspx.page End Render 0.137321 0.134909
>
>
> Why would this happen?

>
> Thanks,
>
> Tom
>>
>> Let me know if you find a definitive solution...
>>
>> Tommaso
>>
>> tshad ha scritto:
>>
>>> <tommaso.gasta***@uniroma1.it> wrote in message
>>> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
>>> > Hi Tom,
>>> >
>>> > I am afraid that is not exactly an "elementary" topic. Here is a more
>>> > authoritative source:
>>> >
>>> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
>>>
>>> I looked there, but the article is about Script Callbacks.
>>>
>>> That was interesting also, as I was looking at doing this (like Ajax)
>>> but in
>>> .net.
>>>
>>> I knew you could do this in .net 1.1, but if what this is saying is
>>> correct
>>> then I can't do it.
>>>
>>> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based on
>>> the
>>> services of a COM object that ships with Internet Explorer 5.0 and
>>> later. By
>>> using the same object, you can implement a script callback mechanism in
>>> ASP.NET 1.x as well"
>>>
>>> I don't want to do it if you have to depend on the user using IE.
>>>
>>> Thanks,
>>>
>>> Tom
>>>
>>> >
>>> > Let us know about the best solution... :)
>>> >
>>> > Tommaso
>>> >
>>> > tshad ha scritto:
>>> >
>>> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
>>> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
>>> >> > <tommaso.gasta***@uniroma1.it> wrote in message
>>> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
>>> >> >> But what about the back button problem.
>>> >> >> I think that user was right. It doesn't work in that case.
>>> >> >
>>> >>
>>> >> Actually, I did some work with the program and found that it also
>>> >> doesn't
>>> >> work on the inital page.  It only works for PostBacks.
>>> >>
>>> >> Looking into it I found that since LoadViewState is not called on an
>>> >> initial
>>> >> page load (makes sense as there would be no ViewState saved here),
>>> >> there
>>> >> is
>>> >> nothing to test.
>>> >>
>>> >> I need to find some other way to make it work or find a way to find
>>> >> out
>>> >> if
>>> >> the initial page.
>>> >>
>>> >> Tom
>>> >>
>>> >> > I know that that is also a problem and I am going to address that
>>> >> > problem
>>> >> > in a bit.  But I needed to get the refresh problem taken care of
>>> >> > right
>>> >> > away.
>>> >> >
>>> >> >>
>>> >> >> The (almost) funny thing is that a guy has copied this article and
>>> >> >> published it on Code Project site.
>>> >> >> He also copied the bugs clearly ... :)
>>> >> >
>>> >> > I agree.
>>> >> >
>>> >> > But that allows someone else to at least get a starting point to
>>> >> > work
>>> >> > from.
>>> >> >
>>> >> > Tom
>>> >> >
>>> >> >>
>>> >> >> Tommaso
>>> >> >>
>>> >> >> tshad ha scritto:
>>> >> >>
>>> >> >>> I was able to get it to work after closer reading of the article.
>>> >> >>>
>>> >> >>> *******************************************************************
>>> >> >>> Namespace MyFunctions
>>> >> >>>
>>> >> >>>  Public Class Page
>>> >> >>>   Inherits System.Web.UI.Page
>>> >> >>>   Private _refreshState As Boolean
>>> >> >>>   Private _isRefresh As Boolean
>>> >> >>>
>>> >> >>>
>>> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
>>> >> >>>    Get
>>> >> >>>     Return _isRefresh
>>> >> >>>    End Get
>>> >> >>>   End Property
>>> >> >>>
>>> >> >>>
>>> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
>>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>>> >> >>>    MyBase.LoadViewState(allStates(0))
>>> >> >>>    _refreshState = CBool(allStates(1))
>>> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>> >> >>>   End Sub 'LoadViewState
>>> >> >>>
>>> >> >>>
>>> >> >>>   Protected Overrides Function SaveViewState() As Object
>>> >> >>>    Session("__ISREFRESH") = _refreshState
>>> >> >>>    Dim allStates(2) As Object
>>> >> >>>    allStates(0) = MyBase.SaveViewState()
>>> >> >>>    allStates(1) = Not _refreshState
>>> >> >>>    Return allStates
>>> >> >>>   End Function 'SaveViewState
>>> >> >>>
>>> >> >>>  End Class 'Page
>>> >> >>>
>>> >> >>> End NameSpace
>>> >> >>> ***********************************************
>>> >> >>>
>>> >> >>> In my page, I have to add an inherits:
>>> >> >>>
>>> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>>> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>>> >> >>> ...
>>> >> >>> trace.warn("is Refresh = " & IsRefresh())
>>> >> >>>
>>> >> >>> Then it works.
>>> >> >>>
>>> >> >>> I am confused as to the code with the "allStates" and how it
>>> >> >>> works.
>>> >> >>>
>>> >> >>> In LoadViewState:
>>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>>> >> >>>    MyBase.LoadViewState(allStates(0))
>>> >> >>>    _refreshState = CBool(allStates(1))
>>> >> >>>
>>> >> >>> It seems to be getting the savedState from the parameters list,
>>> >> >>> then
>>> >> >>> I
>>> >> >>> think
>>> >> >>> it does the normal LoadViewState passing allStates(0) (which is
>>> >> >>> really
>>> >> >>> just
>>> >> >>> savedState - so why not just pass savedState??).
>>> >> >>>
>>> >> >>> Also, what is allStates(1)?
>>> >> >>>
>>> >> >>> In SaveViewState:
>>> >> >>>    Dim allStates(2) As Object
>>> >> >>>    allStates(0) = MyBase.SaveViewState()
>>> >> >>>    allStates(1) = Not _refreshState
>>> >> >>>    Return allStates
>>> >> >>>
>>> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
>>> >> >>> SaveViewState
>>> >> >>> and passes back the changed ViewState into allStates(0), what is
>>> >> >>> allStates(1) and why are we passing back allStates - does this
>>> >> >>> overwrite
>>> >> >>> the
>>> >> >>> ViewState that was written out by MyBase.SaveViewState()?
>>> >> >>>
>>> >> >>> Thanks,
>>> >> >>>
>>> >> >>> Tom
>>> >> >>>
>>> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>>> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>>> >> >>> > Hi Tom,
>>> >> >>> >
>>> >> >>> > see the remarks here made by a User:
>>> >> >>> >
>>> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>>> >> >>> >
>>> >> >>> > this method seems to fail when back button is pressed. You can
>>> >> >>> > download
>>> >> >>> > a demo.
>>> >> >>> >
>>> >> >>> > Tommaso
>>> >> >>> >
>>> >> >>> > tshad ha scritto:
>>> >> >>> >
>>> >> >>> >> I was looking for a way to handle refreshes (user pressed
>>> >> >>> >> refresh
>>> >> >>> >> button)
>>> >> >>> >> and found a piece of code to check if a Web page was refreshed
>>> >> >>> >> but
>>> >> >>> >> I
>>> >> >>> >> can't
>>> >> >>> >> get it to work.
>>> >> >>> >>
>>> >> >>> >> The code is:
>>> >> >>> >> ************************************************************
>>> >> >>> >> Namespace StevenBey.Web.UI
>>> >> >>> >>
>>> >> >>> >>  Public Class Page
>>> >> >>> >>    Inherits System.Web.UI.Page
>>> >> >>> >>    Private _refreshState As Boolean
>>> >> >>> >>    Private _isRefresh As Boolean
>>> >> >>> >>
>>> >> >>> >>
>>> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
>>> >> >>> >>     Get
>>> >> >>> >>       Return _isRefresh
>>> >> >>> >>     End Get
>>> >> >>> >>    End Property
>>> >> >>> >>
>>> >> >>> >>
>>> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
>>> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
>>> >> >>> >>     MyBase.LoadViewState(allStates(0))
>>> >> >>> >>     _refreshState = CBool(allStates(1))
>>> >> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>> >> >>> >>    End Sub 'LoadViewState
>>> >> >>> >>
>>> >> >>> >>
>>> >> >>> >>    Protected Overrides Function SaveViewState() As Object
>>> >> >>> >>     Session("__ISREFRESH") = _refreshState
>>> >> >>> >>     Dim allStates(2) As Object
>>> >> >>> >>     allStates(0) = MyBase.SaveViewState()
>>> >> >>> >>     allStates(1) = Not _refreshState
>>> >> >>> >>     Return allStates
>>> >> >>> >>    End Function 'SaveViewState
>>> >> >>> >>  End Class 'Page
>>> >> >>> >>
>>> >> >>> >> End NameSpace
>>> >> >>> >> ************************************************************
>>> >> >>> >>
>>> >> >>> >> If I do a:
>>> >> >>> >>
>>> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>>> >> >>> >>
>>> >> >>> >> or
>>> >> >>> >>
>>> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
>>> >> >>> >>
>>> >> >>> >> I get the error:
>>> >> >>> >>
>>> >> >>> >>         BC30456 'IsRefresh' is not a member of
>>> >> >>> >> 'System.Web.UI.Page'
>>> >> >>> >>
>>> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it
>>> >> >>> >> in
>>> >> >>> >> my
>>> >> >>> >> Bin
>>> >> >>> >> directory.
>>> >> >>> >>
>>> >> >>> >> If you look at trace page you won't see __ISREFRESH?
>>> >> >>> >>
>>> >> >>> >> Is there something else I need to do to get this to work?
>>> >> >>> >>
>>> >> >>> >> Thanks,
>>> >> >>> >>
>>> >> >>> >> Tom
>>> >> >>> >
>>> >> >>
>>> >> >
>>> >> >
>>> >
>>
>
>

> Below.
>
> "tshad" <tscheider***@ftsolutions.com> wrote in message
> news:OB0zkD%23xGHA.4204@TK2MSFTNGP04.phx.gbl...
> > <tommaso.gasta***@uniroma1.it> wrote in message
> > news:1156464254.543709.314580@h48g2000cwc.googlegroups.com...
> >> Hi Tom,
> >>
> >> I posted the wrong link. Here it is:
> >>
> >> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvs05/html/bedrockaspnet.asp
> >>
> > I'll take a look at that to see what it says.
> >
> >> "Trap the Browser Refresh
> >> In an article originally published on aspnetPRO Magazine several months
> >> ago, I outlined the steps needed to detect when the user presses the F5
> >> browser button to refresh the current page. The page refresh is the
> >> browser's response to a specific user action-hitting the F5 key or
> >> clicking the  toolbar button. The page refresh action is a sort of
> >> internal browser operation, for which the browser doesn't provide any
> >> external notification
> >>
> >> see also:
> >> http://www.joel.net/code/refresh_capture.aspx
> >
> > Already looking at this one.
> >
> > I am looking at using ideas from his code to solve the problem from my
> > program dealing with the LoadViewState on the initial load problem.
> >
> > I did find another problem that I didn't notice before with my code.  I
> > didn't notice that my SaveViewState is being executed twice and I don't
> > know why.  I put a trace statement in the function and found that it is
> > being called before the normal SaveViewState and during the SaveViewState.
> >
> >      aspx.page Begin Init
> >      aspx.page End Init 0.000079 0.000079
> >      aspx.page Begin PreRender 0.000116 0.000037
> >      aspx.page End PreRender 0.000165 0.000049
> >     Inside refresh.cs at SaveViewState 0.000880 0.000715
> >      aspx.page Begin SaveViewState 0.001932 0.001053
> >     Inside refresh.cs at SaveViewState 0.002330 0.000398
> >      aspx.page End SaveViewState 0.002384 0.000054
> >      aspx.page Begin Render 0.002411 0.000027
> >      aspx.page End Render 0.137321 0.134909
> >
> >
> > Why would this happen?
>
> I found that this happens if I have trace="true" on the page.  If I have
> trace="false", it works fine.
>
> Setting trace="true" causes the SVS to fire a second time (I assume the
> event that fires between the normal page events is from this).
>
> Any idea why that is?
>
> Thanks,
>
> Tom
> >
> > Thanks,
> >
> > Tom
> >>
> >> Let me know if you find a definitive solution...
> >>
> >> Tommaso
> >>
> >> tshad ha scritto:
> >>
> >>> <tommaso.gasta***@uniroma1.it> wrote in message
> >>> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
> >>> > Hi Tom,
> >>> >
> >>> > I am afraid that is not exactly an "elementary" topic. Here is a more
> >>> > authoritative source:
> >>> >
> >>> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
> >>>
> >>> I looked there, but the article is about Script Callbacks.
> >>>
> >>> That was interesting also, as I was looking at doing this (like Ajax)
> >>> but in
> >>> .net.
> >>>
> >>> I knew you could do this in .net 1.1, but if what this is saying is
> >>> correct
> >>> then I can't do it.
> >>>
> >>> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based on
> >>> the
> >>> services of a COM object that ships with Internet Explorer 5.0 and
> >>> later. By
> >>> using the same object, you can implement a script callback mechanism in
> >>> ASP.NET 1.x as well"
> >>>
> >>> I don't want to do it if you have to depend on the user using IE.
> >>>
> >>> Thanks,
> >>>
> >>> Tom
> >>>
> >>> >
> >>> > Let us know about the best solution... :)
> >>> >
> >>> > Tommaso
> >>> >
> >>> > tshad ha scritto:
> >>> >
> >>> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
> >>> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
> >>> >> > <tommaso.gasta***@uniroma1.it> wrote in message
> >>> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
> >>> >> >> But what about the back button problem.
> >>> >> >> I think that user was right. It doesn't work in that case.
> >>> >> >
> >>> >>
> >>> >> Actually, I did some work with the program and found that it also
> >>> >> doesn't
> >>> >> work on the inital page.  It only works for PostBacks.
> >>> >>
> >>> >> Looking into it I found that since LoadViewState is not called on an
> >>> >> initial
> >>> >> page load (makes sense as there would be no ViewState saved here),
> >>> >> there
> >>> >> is
> >>> >> nothing to test.
> >>> >>
> >>> >> I need to find some other way to make it work or find a way to find
> >>> >> out
> >>> >> if
> >>> >> the initial page.
> >>> >>
> >>> >> Tom
> >>> >>
> >>> >> > I know that that is also a problem and I am going to address that
> >>> >> > problem
> >>> >> > in a bit.  But I needed to get the refresh problem taken care of
> >>> >> > right
> >>> >> > away.
> >>> >> >
> >>> >> >>
> >>> >> >> The (almost) funny thing is that a guy has copied this article and
> >>> >> >> published it on Code Project site.
> >>> >> >> He also copied the bugs clearly ... :)
> >>> >> >
> >>> >> > I agree.
> >>> >> >
> >>> >> > But that allows someone else to at least get a starting point to
> >>> >> > work
> >>> >> > from.
> >>> >> >
> >>> >> > Tom
> >>> >> >
> >>> >> >>
> >>> >> >> Tommaso
> >>> >> >>
> >>> >> >> tshad ha scritto:
> >>> >> >>
> >>> >> >>> I was able to get it to work after closer reading of the article.
> >>> >> >>>
> >>> >> >>> *******************************************************************
> >>> >> >>> Namespace MyFunctions
> >>> >> >>>
> >>> >> >>>  Public Class Page
> >>> >> >>>   Inherits System.Web.UI.Page
> >>> >> >>>   Private _refreshState As Boolean
> >>> >> >>>   Private _isRefresh As Boolean
> >>> >> >>>
> >>> >> >>>
> >>> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
> >>> >> >>>    Get
> >>> >> >>>     Return _isRefresh
> >>> >> >>>    End Get
> >>> >> >>>   End Property
> >>> >> >>>
> >>> >> >>>
> >>> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
> >>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
> >>> >> >>>    MyBase.LoadViewState(allStates(0))
> >>> >> >>>    _refreshState = CBool(allStates(1))
> >>> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >>> >> >>>   End Sub 'LoadViewState
> >>> >> >>>
> >>> >> >>>
> >>> >> >>>   Protected Overrides Function SaveViewState() As Object
> >>> >> >>>    Session("__ISREFRESH") = _refreshState
> >>> >> >>>    Dim allStates(2) As Object
> >>> >> >>>    allStates(0) = MyBase.SaveViewState()
> >>> >> >>>    allStates(1) = Not _refreshState
> >>> >> >>>    Return allStates
> >>> >> >>>   End Function 'SaveViewState
> >>> >> >>>
> >>> >> >>>  End Class 'Page
> >>> >> >>>
> >>> >> >>> End NameSpace
> >>> >> >>> ***********************************************
> >>> >> >>>
> >>> >> >>> In my page, I have to add an inherits:
> >>> >> >>>
> >>> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
> >>> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
> >>> >> >>> ...
> >>> >> >>> trace.warn("is Refresh = " & IsRefresh())
> >>> >> >>>
> >>> >> >>> Then it works.
> >>> >> >>>
> >>> >> >>> I am confused as to the code with the "allStates" and how it
> >>> >> >>> works.
> >>> >> >>>
> >>> >> >>> In LoadViewState:
> >>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
> >>> >> >>>    MyBase.LoadViewState(allStates(0))
> >>> >> >>>    _refreshState = CBool(allStates(1))
> >>> >> >>>
> >>> >> >>> It seems to be getting the savedState from the parameters list,
> >>> >> >>> then
> >>> >> >>> I
> >>> >> >>> think
> >>> >> >>> it does the normal LoadViewState passing allStates(0) (which is
> >>> >> >>> really
> >>> >> >>> just
> >>> >> >>> savedState - so why not just pass savedState??).
> >>> >> >>>
> >>> >> >>> Also, what is allStates(1)?
> >>> >> >>>
> >>> >> >>> In SaveViewState:
> >>> >> >>>    Dim allStates(2) As Object
> >>> >> >>>    allStates(0) = MyBase.SaveViewState()
> >>> >> >>>    allStates(1) = Not _refreshState
> >>> >> >>>    Return allStates
> >>> >> >>>
> >>> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
> >>> >> >>> SaveViewState
> >>> >> >>> and passes back the changed ViewState into allStates(0), what is
> >>> >> >>> allStates(1) and why are we passing back allStates - does this
> >>> >> >>> overwrite
> >>> >> >>> the
> >>> >> >>> ViewState that was written out by MyBase.SaveViewState()?
> >>> >> >>>
> >>> >> >>> Thanks,
> >>> >> >>>
> >>> >> >>> Tom
> >>> >> >>>
> >>> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
> >>> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
> >>> >> >>> > Hi Tom,
> >>> >> >>> >
> >>> >> >>> > see the remarks here made by a User:
> >>> >> >>> >
> >>> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
> >>> >> >>> >
> >>> >> >>> > this method seems to fail when back button is pressed. You can
> >>> >> >>> > download
> >>> >> >>> > a demo.
> >>> >> >>> >
> >>> >> >>> > Tommaso
> >>> >> >>> >
> >>> >> >>> > tshad ha scritto:
> >>> >> >>> >
> >>> >> >>> >> I was looking for a way to handle refreshes (user pressed
> >>> >> >>> >> refresh
> >>> >> >>> >> button)
> >>> >> >>> >> and found a piece of code to check if a Web page was refreshed
> >>> >> >>> >> but
> >>> >> >>> >> I
> >>> >> >>> >> can't
> >>> >> >>> >> get it to work.
> >>> >> >>> >>
> >>> >> >>> >> The code is:
> >>> >> >>> >> ************************************************************
> >>> >> >>> >> Namespace StevenBey.Web.UI
> >>> >> >>> >>
> >>> >> >>> >>  Public Class Page
> >>> >> >>> >>    Inherits System.Web.UI.Page
> >>> >> >>> >>    Private _refreshState As Boolean
> >>> >> >>> >>    Private _isRefresh As Boolean
> >>> >> >>> >>
> >>> >> >>> >>
> >>> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
> >>> >> >>> >>     Get
> >>> >> >>> >>       Return _isRefresh
> >>> >> >>> >>     End Get
> >>> >> >>> >>    End Property
> >>> >> >>> >>
> >>> >> >>> >>
> >>> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
> >>> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
> >>> >> >>> >>     MyBase.LoadViewState(allStates(0))
> >>> >> >>> >>     _refreshState = CBool(allStates(1))
> >>> >> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >>> >> >>> >>    End Sub 'LoadViewState
> >>> >> >>> >>
> >>> >> >>> >>
> >>> >> >>> >>    Protected Overrides Function SaveViewState() As Object
> >>> >> >>> >>     Session("__ISREFRESH") = _refreshState
> >>> >> >>> >>     Dim allStates(2) As Object
> >>> >> >>> >>     allStates(0) = MyBase.SaveViewState()
> >>> >> >>> >>     allStates(1) = Not _refreshState
> >>> >> >>> >>     Return allStates
> >>> >> >>> >>    End Function 'SaveViewState
> >>> >> >>> >>  End Class 'Page
> >>> >> >>> >>
> >>> >> >>> >> End NameSpace
> >>> >> >>> >> ************************************************************
> >>> >> >>> >>
> >>> >> >>> >> If I do a:
> >>> >> >>> >>
> >>> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
> >>> >> >>> >>
> >>> >> >>> >> or
> >>> >> >>> >>
> >>> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
> >>> >> >>> >>
> >>> >> >>> >> I get the error:
> >>> >> >>> >>
> >>> >> >>> >>         BC30456 'IsRefresh' is not a member of
> >>> >> >>> >> 'System.Web.UI.Page'
> >>> >> >>> >>
> >>> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it
> >>> >> >>> >> in
> >>> >> >>> >> my
> >>> >> >>> >> Bin
> >>> >> >>> >> directory.
> >>> >> >>> >>
> >>> >> >>> >> If you look at trace page you won't see __ISREFRESH?
> >>> >> >>> >>
> >>> >> >>> >> Is there something else I need to do to get this to work?
> >>> >> >>> >>
> >>> >> >>> >> Thanks,
> >>> >> >>> >>
> >>> >> >>> >> Tom
> >>> >> >>> >
> >>> >> >>
> >>> >> >
> >>> >> >
> >>> >
> >>
> >
> >

> Tommaso
>
> tshad ha scritto:
>
>> Below.
>>
>> "tshad" <tscheider***@ftsolutions.com> wrote in message
>> news:OB0zkD%23xGHA.4204@TK2MSFTNGP04.phx.gbl...
>> > <tommaso.gasta***@uniroma1.it> wrote in message
>> > news:1156464254.543709.314580@h48g2000cwc.googlegroups.com...
>> >> Hi Tom,
>> >>
>> >> I posted the wrong link. Here it is:
>> >>
>> >> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvs05/html/bedrockaspnet.asp
>> >>
>> > I'll take a look at that to see what it says.
>> >
>> >> "Trap the Browser Refresh
>> >> In an article originally published on aspnetPRO Magazine several
>> >> months
>> >> ago, I outlined the steps needed to detect when the user presses the
>> >> F5
>> >> browser button to refresh the current page. The page refresh is the
>> >> browser's response to a specific user action-hitting the F5 key or
>> >> clicking the  toolbar button. The page refresh action is a sort of
>> >> internal browser operation, for which the browser doesn't provide any
>> >> external notification
>> >>
>> >> see also:
>> >> http://www.joel.net/code/refresh_capture.aspx
>> >
>> > Already looking at this one.
>> >
>> > I am looking at using ideas from his code to solve the problem from my
>> > program dealing with the LoadViewState on the initial load problem.
>> >
>> > I did find another problem that I didn't notice before with my code.  I
>> > didn't notice that my SaveViewState is being executed twice and I don't
>> > know why.  I put a trace statement in the function and found that it is
>> > being called before the normal SaveViewState and during the
>> > SaveViewState.
>> >
>> >      aspx.page Begin Init
>> >      aspx.page End Init 0.000079 0.000079
>> >      aspx.page Begin PreRender 0.000116 0.000037
>> >      aspx.page End PreRender 0.000165 0.000049
>> >     Inside refresh.cs at SaveViewState 0.000880 0.000715
>> >      aspx.page Begin SaveViewState 0.001932 0.001053
>> >     Inside refresh.cs at SaveViewState 0.002330 0.000398
>> >      aspx.page End SaveViewState 0.002384 0.000054
>> >      aspx.page Begin Render 0.002411 0.000027
>> >      aspx.page End Render 0.137321 0.134909
>> >
>> >
>> > Why would this happen?
>>
>> I found that this happens if I have trace="true" on the page.  If I have
>> trace="false", it works fine.
>>
>> Setting trace="true" causes the SVS to fire a second time (I assume the
>> event that fires between the normal page events is from this).
>>
>> Any idea why that is?
>>
>> Thanks,
>>
>> Tom
>> >
>> > Thanks,
>> >
>> > Tom
>> >>
>> >> Let me know if you find a definitive solution...
>> >>
>> >> Tommaso
>> >>
>> >> tshad ha scritto:
>> >>
>> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>> >>> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
>> >>> > Hi Tom,
>> >>> >
>> >>> > I am afraid that is not exactly an "elementary" topic. Here is a
>> >>> > more
>> >>> > authoritative source:
>> >>> >
>> >>> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
>> >>>
>> >>> I looked there, but the article is about Script Callbacks.
>> >>>
>> >>> That was interesting also, as I was looking at doing this (like Ajax)
>> >>> but in
>> >>> .net.
>> >>>
>> >>> I knew you could do this in .net 1.1, but if what this is saying is
>> >>> correct
>> >>> then I can't do it.
>> >>>
>> >>> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based
>> >>> on
>> >>> the
>> >>> services of a COM object that ships with Internet Explorer 5.0 and
>> >>> later. By
>> >>> using the same object, you can implement a script callback mechanism
>> >>> in
>> >>> ASP.NET 1.x as well"
>> >>>
>> >>> I don't want to do it if you have to depend on the user using IE.
>> >>>
>> >>> Thanks,
>> >>>
>> >>> Tom
>> >>>
>> >>> >
>> >>> > Let us know about the best solution... :)
>> >>> >
>> >>> > Tommaso
>> >>> >
>> >>> > tshad ha scritto:
>> >>> >
>> >>> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
>> >>> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
>> >>> >> > <tommaso.gasta***@uniroma1.it> wrote in message
>> >>> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
>> >>> >> >> But what about the back button problem.
>> >>> >> >> I think that user was right. It doesn't work in that case.
>> >>> >> >
>> >>> >>
>> >>> >> Actually, I did some work with the program and found that it also
>> >>> >> doesn't
>> >>> >> work on the inital page.  It only works for PostBacks.
>> >>> >>
>> >>> >> Looking into it I found that since LoadViewState is not called on
>> >>> >> an
>> >>> >> initial
>> >>> >> page load (makes sense as there would be no ViewState saved here),
>> >>> >> there
>> >>> >> is
>> >>> >> nothing to test.
>> >>> >>
>> >>> >> I need to find some other way to make it work or find a way to
>> >>> >> find
>> >>> >> out
>> >>> >> if
>> >>> >> the initial page.
>> >>> >>
>> >>> >> Tom
>> >>> >>
>> >>> >> > I know that that is also a problem and I am going to address
>> >>> >> > that
>> >>> >> > problem
>> >>> >> > in a bit.  But I needed to get the refresh problem taken care of
>> >>> >> > right
>> >>> >> > away.
>> >>> >> >
>> >>> >> >>
>> >>> >> >> The (almost) funny thing is that a guy has copied this article
>> >>> >> >> and
>> >>> >> >> published it on Code Project site.
>> >>> >> >> He also copied the bugs clearly ... :)
>> >>> >> >
>> >>> >> > I agree.
>> >>> >> >
>> >>> >> > But that allows someone else to at least get a starting point to
>> >>> >> > work
>> >>> >> > from.
>> >>> >> >
>> >>> >> > Tom
>> >>> >> >
>> >>> >> >>
>> >>> >> >> Tommaso
>> >>> >> >>
>> >>> >> >> tshad ha scritto:
>> >>> >> >>
>> >>> >> >>> I was able to get it to work after closer reading of the
>> >>> >> >>> article.
>> >>> >> >>>
>> >>> >> >>> *******************************************************************
>> >>> >> >>> Namespace MyFunctions
>> >>> >> >>>
>> >>> >> >>>  Public Class Page
>> >>> >> >>>   Inherits System.Web.UI.Page
>> >>> >> >>>   Private _refreshState As Boolean
>> >>> >> >>>   Private _isRefresh As Boolean
>> >>> >> >>>
>> >>> >> >>>
>> >>> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
>> >>> >> >>>    Get
>> >>> >> >>>     Return _isRefresh
>> >>> >> >>>    End Get
>> >>> >> >>>   End Property
>> >>> >> >>>
>> >>> >> >>>
>> >>> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
>> >>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >>> >> >>>    MyBase.LoadViewState(allStates(0))
>> >>> >> >>>    _refreshState = CBool(allStates(1))
>> >>> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >>> >> >>>   End Sub 'LoadViewState
>> >>> >> >>>
>> >>> >> >>>
>> >>> >> >>>   Protected Overrides Function SaveViewState() As Object
>> >>> >> >>>    Session("__ISREFRESH") = _refreshState
>> >>> >> >>>    Dim allStates(2) As Object
>> >>> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >>> >> >>>    allStates(1) = Not _refreshState
>> >>> >> >>>    Return allStates
>> >>> >> >>>   End Function 'SaveViewState
>> >>> >> >>>
>> >>> >> >>>  End Class 'Page
>> >>> >> >>>
>> >>> >> >>> End NameSpace
>> >>> >> >>> ***********************************************
>> >>> >> >>>
>> >>> >> >>> In my page, I have to add an inherits:
>> >>> >> >>>
>> >>> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>> >>> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>> >>> >> >>> ...
>> >>> >> >>> trace.warn("is Refresh = " & IsRefresh())
>> >>> >> >>>
>> >>> >> >>> Then it works.
>> >>> >> >>>
>> >>> >> >>> I am confused as to the code with the "allStates" and how it
>> >>> >> >>> works.
>> >>> >> >>>
>> >>> >> >>> In LoadViewState:
>> >>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >>> >> >>>    MyBase.LoadViewState(allStates(0))
>> >>> >> >>>    _refreshState = CBool(allStates(1))
>> >>> >> >>>
>> >>> >> >>> It seems to be getting the savedState from the parameters
>> >>> >> >>> list,
>> >>> >> >>> then
>> >>> >> >>> I
>> >>> >> >>> think
>> >>> >> >>> it does the normal LoadViewState passing allStates(0) (which
>> >>> >> >>> is
>> >>> >> >>> really
>> >>> >> >>> just
>> >>> >> >>> savedState - so why not just pass savedState??).
>> >>> >> >>>
>> >>> >> >>> Also, what is allStates(1)?
>> >>> >> >>>
>> >>> >> >>> In SaveViewState:
>> >>> >> >>>    Dim allStates(2) As Object
>> >>> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >>> >> >>>    allStates(1) = Not _refreshState
>> >>> >> >>>    Return allStates
>> >>> >> >>>
>> >>> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
>> >>> >> >>> SaveViewState
>> >>> >> >>> and passes back the changed ViewState into allStates(0), what
>> >>> >> >>> is
>> >>> >> >>> allStates(1) and why are we passing back allStates - does this
>> >>> >> >>> overwrite
>> >>> >> >>> the
>> >>> >> >>> ViewState that was written out by MyBase.SaveViewState()?
>> >>> >> >>>
>> >>> >> >>> Thanks,
>> >>> >> >>>
>> >>> >> >>> Tom
>> >>> >> >>>
>> >>> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>> >>> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>> >>> >> >>> > Hi Tom,
>> >>> >> >>> >
>> >>> >> >>> > see the remarks here made by a User:
>> >>> >> >>> >
>> >>> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>> >>> >> >>> >
>> >>> >> >>> > this method seems to fail when back button is pressed. You
>> >>> >> >>> > can
>> >>> >> >>> > download
>> >>> >> >>> > a demo.
>> >>> >> >>> >
>> >>> >> >>> > Tommaso
>> >>> >> >>> >
>> >>> >> >>> > tshad ha scritto:
>> >>> >> >>> >
>> >>> >> >>> >> I was looking for a way to handle refreshes (user pressed
>> >>> >> >>> >> refresh
>> >>> >> >>> >> button)
>> >>> >> >>> >> and found a piece of code to check if a Web page was
>> >>> >> >>> >> refreshed
>> >>> >> >>> >> but
>> >>> >> >>> >> I
>> >>> >> >>> >> can't
>> >>> >> >>> >> get it to work.
>> >>> >> >>> >>
>> >>> >> >>> >> The code is:
>> >>> >> >>> >> ************************************************************
>> >>> >> >>> >> Namespace StevenBey.Web.UI
>> >>> >> >>> >>
>> >>> >> >>> >>  Public Class Page
>> >>> >> >>> >>    Inherits System.Web.UI.Page
>> >>> >> >>> >>    Private _refreshState As Boolean
>> >>> >> >>> >>    Private _isRefresh As Boolean
>> >>> >> >>> >>
>> >>> >> >>> >>
>> >>> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
>> >>> >> >>> >>     Get
>> >>> >> >>> >>       Return _isRefresh
>> >>> >> >>> >>     End Get
>> >>> >> >>> >>    End Property
>> >>> >> >>> >>
>> >>> >> >>> >>
>> >>> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As
>> >>> >> >>> >> Object)
>> >>> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
>> >>> >> >>> >>     MyBase.LoadViewState(allStates(0))
>> >>> >> >>> >>     _refreshState = CBool(allStates(1))
>> >>> >> >>> >>     _isRefresh = _refreshState =
>> >>> >> >>> >> CBool(Session("__ISREFRESH"))
>> >>> >> >>> >>    End Sub 'LoadViewState
>> >>> >> >>> >>
>> >>> >> >>> >>
>> >>> >> >>> >>    Protected Overrides Function SaveViewState() As Object
>> >>> >> >>> >>     Session("__ISREFRESH") = _refreshState
>> >>> >> >>> >>     Dim allStates(2) As Object
>> >>> >> >>> >>     allStates(0) = MyBase.SaveViewState()
>> >>> >> >>> >>     allStates(1) = Not _refreshState
>> >>> >> >>> >>     Return allStates
>> >>> >> >>> >>    End Function 'SaveViewState
>> >>> >> >>> >>  End Class 'Page
>> >>> >> >>> >>
>> >>> >> >>> >> End NameSpace
>> >>> >> >>> >> ************************************************************
>> >>> >> >>> >>
>> >>> >> >>> >> If I do a:
>> >>> >> >>> >>
>> >>> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>> >>> >> >>> >>
>> >>> >> >>> >> or
>> >>> >> >>> >>
>> >>> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
>> >>> >> >>> >>
>> >>> >> >>> >> I get the error:
>> >>> >> >>> >>
>> >>> >> >>> >>         BC30456 'IsRefresh' is not a member of
>> >>> >> >>> >> 'System.Web.UI.Page'
>> >>> >> >>> >>
>> >>> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put
>> >>> >> >>> >> it
>> >>> >> >>> >> in
>> >>> >> >>> >> my
>> >>> >> >>> >> Bin
>> >>> >> >>> >> directory.
>> >>> >> >>> >>
>> >>> >> >>> >> If you look at trace page you won't see __ISREFRESH?
>> >>> >> >>> >>
>> >>> >> >>> >> Is there something else I need to do to get this to work?
>> >>> >> >>> >>
>> >>> >> >>> >> Thanks,
>> >>> >> >>> >>
>> >>> >> >>> >> Tom
>> >>> >> >>> >
>> >>> >> >>
>> >>> >> >
>> >>> >> >
>> >>> >
>> >>
>> >
>> >
>

> Tommaso
>
> tshad ha scritto:
>
>> <tommaso.gasta***@uniroma1.it> wrote in message
>> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
>> > Hi Tom,
>> >
>> > I am afraid that is not exactly an "elementary" topic. Here is a more
>> > authoritative source:
>> >
>> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
>>
>> I looked there, but the article is about Script Callbacks.
>>
>> That was interesting also, as I was looking at doing this (like Ajax) but
>> in
>> .net.
>>
>> I knew you could do this in .net 1.1, but if what this is saying is
>> correct
>> then I can't do it.
>>
>> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based on
>> the
>> services of a COM object that ships with Internet Explorer 5.0 and later.
>> By
>> using the same object, you can implement a script callback mechanism in
>> ASP.NET 1.x as well"
>>
>> I don't want to do it if you have to depend on the user using IE.
>>
>> Thanks,
>>
>> Tom
>>
>> >
>> > Let us know about the best solution... :)
>> >
>> > Tommaso
>> >
>> > tshad ha scritto:
>> >
>> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
>> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
>> >> > <tommaso.gasta***@uniroma1.it> wrote in message
>> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
>> >> >> But what about the back button problem.
>> >> >> I think that user was right. It doesn't work in that case.
>> >> >
>> >>
>> >> Actually, I did some work with the program and found that it also
>> >> doesn't
>> >> work on the inital page.  It only works for PostBacks.
>> >>
>> >> Looking into it I found that since LoadViewState is not called on an
>> >> initial
>> >> page load (makes sense as there would be no ViewState saved here),
>> >> there
>> >> is
>> >> nothing to test.
>> >>
>> >> I need to find some other way to make it work or find a way to find
>> >> out
>> >> if
>> >> the initial page.
>> >>
>> >> Tom
>> >>
>> >> > I know that that is also a problem and I am going to address that
>> >> > problem
>> >> > in a bit.  But I needed to get the refresh problem taken care of
>> >> > right
>> >> > away.
>> >> >
>> >> >>
>> >> >> The (almost) funny thing is that a guy has copied this article and
>> >> >> published it on Code Project site.
>> >> >> He also copied the bugs clearly ... :)
>> >> >
>> >> > I agree.
>> >> >
>> >> > But that allows someone else to at least get a starting point to
>> >> > work
>> >> > from.
>> >> >
>> >> > Tom
>> >> >
>> >> >>
>> >> >> Tommaso
>> >> >>
>> >> >> tshad ha scritto:
>> >> >>
>> >> >>> I was able to get it to work after closer reading of the article.
>> >> >>>
>> >> >>> *******************************************************************
>> >> >>> Namespace MyFunctions
>> >> >>>
>> >> >>>  Public Class Page
>> >> >>>   Inherits System.Web.UI.Page
>> >> >>>   Private _refreshState As Boolean
>> >> >>>   Private _isRefresh As Boolean
>> >> >>>
>> >> >>>
>> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
>> >> >>>    Get
>> >> >>>     Return _isRefresh
>> >> >>>    End Get
>> >> >>>   End Property
>> >> >>>
>> >> >>>
>> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >> >>>    MyBase.LoadViewState(allStates(0))
>> >> >>>    _refreshState = CBool(allStates(1))
>> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >> >>>   End Sub 'LoadViewState
>> >> >>>
>> >> >>>
>> >> >>>   Protected Overrides Function SaveViewState() As Object
>> >> >>>    Session("__ISREFRESH") = _refreshState
>> >> >>>    Dim allStates(2) As Object
>> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >> >>>    allStates(1) = Not _refreshState
>> >> >>>    Return allStates
>> >> >>>   End Function 'SaveViewState
>> >> >>>
>> >> >>>  End Class 'Page
>> >> >>>
>> >> >>> End NameSpace
>> >> >>> ***********************************************
>> >> >>>
>> >> >>> In my page, I have to add an inherits:
>> >> >>>
>> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>> >> >>> ...
>> >> >>> trace.warn("is Refresh = " & IsRefresh())
>> >> >>>
>> >> >>> Then it works.
>> >> >>>
>> >> >>> I am confused as to the code with the "allStates" and how it
>> >> >>> works.
>> >> >>>
>> >> >>> In LoadViewState:
>> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >> >>>    MyBase.LoadViewState(allStates(0))
>> >> >>>    _refreshState = CBool(allStates(1))
>> >> >>>
>> >> >>> It seems to be getting the savedState from the parameters list,
>> >> >>> then
>> >> >>> I
>> >> >>> think
>> >> >>> it does the normal LoadViewState passing allStates(0) (which is
>> >> >>> really
>> >> >>> just
>> >> >>> savedState - so why not just pass savedState??).
>> >> >>>
>> >> >>> Also, what is allStates(1)?
>> >> >>>
>> >> >>> In SaveViewState:
>> >> >>>    Dim allStates(2) As Object
>> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >> >>>    allStates(1) = Not _refreshState
>> >> >>>    Return allStates
>> >> >>>
>> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
>> >> >>> SaveViewState
>> >> >>> and passes back the changed ViewState into allStates(0), what is
>> >> >>> allStates(1) and why are we passing back allStates - does this
>> >> >>> overwrite
>> >> >>> the
>> >> >>> ViewState that was written out by MyBase.SaveViewState()?
>> >> >>>
>> >> >>> Thanks,
>> >> >>>
>> >> >>> Tom
>> >> >>>
>> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>> >> >>> > Hi Tom,
>> >> >>> >
>> >> >>> > see the remarks here made by a User:
>> >> >>> >
>> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>> >> >>> >
>> >> >>> > this method seems to fail when back button is pressed. You can
>> >> >>> > download
>> >> >>> > a demo.
>> >> >>> >
>> >> >>> > Tommaso
>> >> >>> >
>> >> >>> > tshad ha scritto:
>> >> >>> >
>> >> >>> >> I was looking for a way to handle refreshes (user pressed
>> >> >>> >> refresh
>> >> >>> >> button)
>> >> >>> >> and found a piece of code to check if a Web page was refreshed
>> >> >>> >> but
>> >> >>> >> I
>> >> >>> >> can't
>> >> >>> >> get it to work.
>> >> >>> >>
>> >> >>> >> The code is:
>> >> >>> >> ************************************************************
>> >> >>> >> Namespace StevenBey.Web.UI
>> >> >>> >>
>> >> >>> >>  Public Class Page
>> >> >>> >>    Inherits System.Web.UI.Page
>> >> >>> >>    Private _refreshState As Boolean
>> >> >>> >>    Private _isRefresh As Boolean
>> >> >>> >>
>> >> >>> >>
>> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
>> >> >>> >>     Get
>> >> >>> >>       Return _isRefresh
>> >> >>> >>     End Get
>> >> >>> >>    End Property
>> >> >>> >>
>> >> >>> >>
>> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
>> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
>> >> >>> >>     MyBase.LoadViewState(allStates(0))
>> >> >>> >>     _refreshState = CBool(allStates(1))
>> >> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >> >>> >>    End Sub 'LoadViewState
>> >> >>> >>
>> >> >>> >>
>> >> >>> >>    Protected Overrides Function SaveViewState() As Object
>> >> >>> >>     Session("__ISREFRESH") = _refreshState
>> >> >>> >>     Dim allStates(2) As Object
>> >> >>> >>     allStates(0) = MyBase.SaveViewState()
>> >> >>> >>     allStates(1) = Not _refreshState
>> >> >>> >>     Return allStates
>> >> >>> >>    End Function 'SaveViewState
>> >> >>> >>  End Class 'Page
>> >> >>> >>
>> >> >>> >> End NameSpace
>> >> >>> >> ************************************************************
>> >> >>> >>
>> >> >>> >> If I do a:
>> >> >>> >>
>> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>> >> >>> >>
>> >> >>> >> or
>> >> >>> >>
>> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
>> >> >>> >>
>> >> >>> >> I get the error:
>> >> >>> >>
>> >> >>> >>         BC30456 'IsRefresh' is not a member of
>> >> >>> >> 'System.Web.UI.Page'
>> >> >>> >>
>> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it
>> >> >>> >> in
>> >> >>> >> my
>> >> >>> >> Bin
>> >> >>> >> directory.
>> >> >>> >>
>> >> >>> >> If you look at trace page you won't see __ISREFRESH?
>> >> >>> >>
>> >> >>> >> Is there something else I need to do to get this to work?
>> >> >>> >>
>> >> >>> >> Thanks,
>> >> >>> >>
>> >> >>> >> Tom
>> >> >>> >
>> >> >>
>> >> >
>> >> >
>> >
>

> >
> > Let me know if you find a definitive solution...
> >
> Finally got it to work.
>
> I used as my basic code the code from
> http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html.
>
> The problem with this code is it doesn't take into account the Initial page
> load being refreshed, which may not be a problem most of the time.  But if
> you do any database processing, setting session variables etc. - this could
> be a problem.
>
> What I added was the setting of a session variable to the URL and when I
> enter the page, if the page is NOT a Post Backed page I compare the current
> URL with what is in the Session variable.  If they don't match or the
> Session Variable is not there, then this is not a refresh.  If it is there,
> then the page was either refreshed or they just reentered the URL in the
> Browsers Address line (really the same thing).
>
> I also found that SVS (SaveViewState) is executed twice if you have tracing
> on (trace="true"). You'll notice the first SVS is done between events (at
> least the events that display on the trace page).  I assume this one is the
> being executed by Trace in some way because right after that the
> SaveViewState is executed.  If trace is off, you only get the SVS.
>
> Also, the trace statement is the only thing that is in my SVS call. So
> something is calling my SVS event other than the Page SVS and there are no
> controls on the page.
>
> aspx.page Begin Init
> aspx.page End Init 0.000079 0.000079
> aspx.page Begin PreRender 0.000116 0.000037
> aspx.page End PreRender 0.000165 0.000049
>       Inside refresh.cs at SaveViewState 0.000880 0.000715
> aspx.page Begin SaveViewState 0.001932 0.001053
>       Inside refresh.cs at SaveViewState 0.002330 0.000398
> aspx.page End SaveViewState 0.002384 0.000054
> aspx.page Begin Render 0.002411 0.000027
> aspx.page End Render 0.137321 0.134909
>
> So what I do set a variable, _firstTime, that I set to false in the 1st SVS
> so that the 2nd SVS will execute normally but won't set anything.
>
> To make this work for only specific pages, you need to add
> Inherits="MyFunctions.Page" to the Page tag on the page:
>
> <%@ Page Language="VB" trace="true" debug="true" ContentType="text/html"
> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page" %>
>
> or if you want this to work for every page I believe you can set it in your
> Web.Config file:
>
> <pages Inherits="MyFunctions.Page" />
>
> The one problem I have not been able figure out (if you are only doing this
> for specific pages) is when you load a page (which would set the Session
> variable) then go directly another set of pages not using this procedure.
> If you then go back to the 1st page, it will set the session variable set
> and think this is a refresh, when in fact it isn't.
>
> Here is the actual code (in c# as that is what I created this in, but then I
> converted it to vb for here).
> ***************************************************************************
> using System;
> using System.IO;
> using System.Web;
> using System.Web.UI;
> using System.Web.SessionState;
>
> namespace MyFunctions
> {
>
> // This program deals with 2 situations of refresh.
> // Initial load of a page
> //  Checks to see if this is a PostBack.
> //   If not - Checks to see if Session("__LASTPAGEPROCESSED") matches the
> current URL.
> //    If it does, the page has either been refreshed or re-entered in the
> address line of Browser
> // PostBack
> //  Checks to see if _refreshState that is stored in the ViewState matches
> Session["__ISREFRESH"].
> //   if it does, we have a refresh.  This is because we set the Session
> variable and put the reverse
> //   value in the viewstate.  If we refresh the page we get the old
> viewstate back and the old viewstate
> //   value should match our new Session value.  Remember we keep reversing
> the values.
>
>  public class Page : System.Web.UI.Page
>  {
>   private bool _refreshState;
>   private bool _isRefresh;
>
> // This variable is only important to signify whether SaveViewState is
> executing for a second time
> // During the same Page Life Cycle.  Have only seen this when you have
> tracing on (Trace="true")
>
>   private bool _firstTime = true;
>
>   public bool IsRefresh
>   {
>    get
>    {
>     if (!IsPostBack)
>     {
>      if ((Session["__INITIALREFRESHPAGE"] != null) &&
> ((string)Session["__INITIALREFRESHPAGE"] ==
> HttpContext.Current.Request.Url.ToString()))
>      {
> //     Need to set this here as this is a refresh or was re-executed from
> the URL line.
> //     In either case, the results are the same.
>       _isRefresh = true;
>      }
>     }
>     return _isRefresh;
>    }
>   }
>
>   public bool IsFirstTime
>   {
>    get
>    {
>     return _firstTime;
>    }
>    set
>    {
>     _firstTime = value;
>    }
>   }
>
>   protected override void LoadViewState(object savedState)
>   {
>    object[] allStates = (object[]) savedState;
>    base.LoadViewState(allStates[0]);
>    _refreshState = (bool) allStates[1];
>    _isRefresh = _refreshState == (bool) Session["__ISREFRESH"];
>    Session.Remove("__INITIALREFRESHPAGE");   // Only there to test initial
> page load refresh
>   }
>
>   protected override object SaveViewState()
>   {
>    object[] allStates = new object[2];
>    allStates[0] = base.SaveViewState();
>
> //  This test is mainly when trace="true".  SaveViewState will execute twice
> and we only need to process this once
>
>    if (_firstTime)
>    {
> //   This only happens on the initial load of a page where there is no
> LoadViewState
>     if (!IsPostBack)
>     {
>      Session["__INITIALREFRESHPAGE"] =
> HttpContext.Current.Request.Url.ToString();
>     }
>     Session["__ISREFRESH"] = _refreshState;
>     allStates[1] = !_refreshState;
>    }
>    else
>    {
> //    We already reversed _refresh states.  To do it again would put it back
> the way it was.
> //   Need to store the _refreshState anyway as we need to return the
> ViewState.
>
>     allStates[1] = !_refreshState;
>    }
>    _firstTime = false;
>    return allStates;
>   }
>  }
> }
> ****************************************************************************
>
> Here is the converted VB code (but I haven't tested it)
> *****************************************************************
> Imports System
> Imports System.IO
> Imports System.Web
> Imports System.Web.UI
> Imports System.Web.SessionState
>
> ' This program deals with 2 situations of refresh.
> ' Initial load of a page
> '  Checks to see if this is a PostBack.
> '   If not - Checks to see if Session("__LASTPAGEPROCESSED") matches the
> current URL.
> '    If it does, the page has either been refreshed or re-entered in the
> address line of Browser
> ' PostBack
> '  Checks to see if _refreshState that is stored in the ViewState matches
> Session["__ISREFRESH"].
> '   if it does, we have a refresh.  This is because we set the Session
> variable and put the reverse
> '   value in the viewstate.  If we refresh the page we get the old viewstate
> back and the old viewstate
> '   value should match our new Session value.  Remember we keep reversing
> the values.
> Public Class Page
>    Inherits System.Web.UI.Page
>    Private _refreshState As Boolean
>    Private _isRefresh As Boolean
>
>    ' This variable is only important to signify whether SaveViewState is
> executing for a second time
>    ' During the same Page Life Cycle.  Have only seen this when you have
> tracing on (Trace="true")
>    Private _firstTime As Boolean = True
>
>    Public ReadOnly Property IsRefresh() As Boolean
>       Get
>          If Not IsPostBack Then
>             If Not (Session("__INITIALREFRESHPAGE") Is Nothing) And
> CStr(Session("__INITIALREFRESHPAGE")) =
> HttpContext.Current.Request.Url.ToString() Then
>                '     Need to set this here as this is a refresh or was
> re-executed from the URL line.
>                '     In either case, the results are the same.
>                _isRefresh = True
>             End If
>          End If
>          Return _isRefresh
>       End Get
>    End Property
>
>    Public Property IsFirstTime() As Boolean
>       Get
>          Return _firstTime
>       End Get
>       Set
>          _firstTime = value
>       End Set
>    End Property
>
>    Protected Overrides Sub LoadViewState(savedState As Object)
>       Dim allStates As Object() = CType(savedState, Object())
>       MyBase.LoadViewState(allStates(0))
>       _refreshState = CBool(allStates(1))
>       _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>       Session.Remove("__INITIALREFRESHPAGE") ' Only there to test initial
> page load refresh
>    End Sub 'LoadViewState
>
>    Protected Overrides Function SaveViewState() As Object
>       Dim allStates(2) As Object
>       allStates(0) = MyBase.SaveViewState()
>
>       '  This test is mainly when trace="true".  SaveViewState will execute
> twice and we only need to process this once
>       If _firstTime Then
>          '   This only happens on the initial load of a page where there is
> no LoadViewState
>          If Not IsPostBack Then
>             Session("__INITIALREFRESHPAGE") =
> HttpContext.Current.Request.Url.ToString()
>          End If
>          Session("__ISREFRESH") = _refreshState
>          allStates(1) = Not _refreshState
>       Else
>          '    We already reversed _refresh states.  To do it again would put
> it back the way it was.
>          '   Need to store the _refreshState anyway as we need to return the
> ViewState.
>          allStates(1) = Not _refreshState
>       End If
>       _firstTime = False
>       Return allStates
>    End Function 'SaveViewState
> End Class 'Page
> *****************************************************************************
>
> In your code, you only have to check the property:
>
> if IsRefresh...
>
> Seems to work OK, except for the one problem I stated.
>
> Someone mentioned a problem with the backbutton in the other program, but I
> am not dealing with that here - just a refresh.
>
> Tom
>
> > Tommaso
> >
> > tshad ha scritto:
> >
> >> <tommaso.gasta***@uniroma1.it> wrote in message
> >> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
> >> > Hi Tom,
> >> >
> >> > I am afraid that is not exactly an "elementary" topic. Here is a more
> >> > authoritative source:
> >> >
> >> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
> >>
> >> I looked there, but the article is about Script Callbacks.
> >>
> >> That was interesting also, as I was looking at doing this (like Ajax) but
> >> in
> >> .net.
> >>
> >> I knew you could do this in .net 1.1, but if what this is saying is
> >> correct
> >> then I can't do it.
> >>
> >> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based on
> >> the
> >> services of a COM object that ships with Internet Explorer 5.0 and later.
> >> By
> >> using the same object, you can implement a script callback mechanism in
> >> ASP.NET 1.x as well"
> >>
> >> I don't want to do it if you have to depend on the user using IE.
> >>
> >> Thanks,
> >>
> >> Tom
> >>
> >> >
> >> > Let us know about the best solution... :)
> >> >
> >> > Tommaso
> >> >
> >> > tshad ha scritto:
> >> >
> >> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
> >> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
> >> >> > <tommaso.gasta***@uniroma1.it> wrote in message
> >> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
> >> >> >> But what about the back button problem.
> >> >> >> I think that user was right. It doesn't work in that case.
> >> >> >
> >> >>
> >> >> Actually, I did some work with the program and found that it also
> >> >> doesn't
> >> >> work on the inital page.  It only works for PostBacks.
> >> >>
> >> >> Looking into it I found that since LoadViewState is not called on an
> >> >> initial
> >> >> page load (makes sense as there would be no ViewState saved here),
> >> >> there
> >> >> is
> >> >> nothing to test.
> >> >>
> >> >> I need to find some other way to make it work or find a way to find
> >> >> out
> >> >> if
> >> >> the initial page.
> >> >>
> >> >> Tom
> >> >>
> >> >> > I know that that is also a problem and I am going to address that
> >> >> > problem
> >> >> > in a bit.  But I needed to get the refresh problem taken care of
> >> >> > right
> >> >> > away.
> >> >> >
> >> >> >>
> >> >> >> The (almost) funny thing is that a guy has copied this article and
> >> >> >> published it on Code Project site.
> >> >> >> He also copied the bugs clearly ... :)
> >> >> >
> >> >> > I agree.
> >> >> >
> >> >> > But that allows someone else to at least get a starting point to
> >> >> > work
> >> >> > from.
> >> >> >
> >> >> > Tom
> >> >> >
> >> >> >>
> >> >> >> Tommaso
> >> >> >>
> >> >> >> tshad ha scritto:
> >> >> >>
> >> >> >>> I was able to get it to work after closer reading of the article.
> >> >> >>>
> >> >> >>> *******************************************************************
> >> >> >>> Namespace MyFunctions
> >> >> >>>
> >> >> >>>  Public Class Page
> >> >> >>>   Inherits System.Web.UI.Page
> >> >> >>>   Private _refreshState As Boolean
> >> >> >>>   Private _isRefresh As Boolean
> >> >> >>>
> >> >> >>>
> >> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
> >> >> >>>    Get
> >> >> >>>     Return _isRefresh
> >> >> >>>    End Get
> >> >> >>>   End Property
> >> >> >>>
> >> >> >>>
> >> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
> >> >> >>>    Dim allStates As Object() = CType(savedState, Object())
> >> >> >>>    MyBase.LoadViewState(allStates(0))
> >> >> >>>    _refreshState = CBool(allStates(1))
> >> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >> >> >>>   End Sub 'LoadViewState
> >> >> >>>
> >> >> >>>
> >> >> >>>   Protected Overrides Function SaveViewState() As Object
> >> >> >>>    Session("__ISREFRESH") = _refreshState
> >> >> >>>    Dim allStates(2) As Object
> >> >> >>>    allStates(0) = MyBase.SaveViewState()
> >> >> >>>    allStates(1) = Not _refreshState
> >> >> >>>    Return allStates
> >> >> >>>   End Function 'SaveViewState
> >> >> >>>
> >> >> >>>  End Class 'Page
> >> >> >>>
> >> >> >>> End NameSpace
> >> >> >>> ***********************************************
> >> >> >>>
> >> >> >>> In my page, I have to add an inherits:
> >> >> >>>
> >> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
> >> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
> >> >> >>> ...
> >> >> >>> trace.warn("is Refresh = " & IsRefresh())
> >> >> >>>
> >> >> >>> Then it works.
> >> >> >>>
> >> >> >>> I am confused as to the code with the "allStates" and how it
> >> >> >>> works.
> >> >> >>>
> >> >> >>> In LoadViewState:
> >> >> >>>    Dim allStates As Object() = CType(savedState, Object())
> >> >> >>>    MyBase.LoadViewState(allStates(0))
> >> >> >>>    _refreshState = CBool(allStates(1))
> >> >> >>>
> >> >> >>> It seems to be getting the savedState from the parameters list,
> >> >> >>> then
> >> >> >>> I
> >> >> >>> think
> >> >> >>> it does the normal LoadViewState passing allStates(0) (which is
> >> >> >>> really
> >> >> >>> just
> >> >> >>> savedState - so why not just pass savedState??).
> >> >> >>>
> >> >> >>> Also, what is allStates(1)?
> >> >> >>>
> >> >> >>> In SaveViewState:
> >> >> >>>    Dim allStates(2) As Object
> >> >> >>>    allStates(0) = MyBase.SaveViewState()
> >> >> >>>    allStates(1) = Not _refreshState
> >> >> >>>    Return allStates
> >> >> >>>
> >> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
> >> >> >>> SaveViewState
> >> >> >>> and passes back the changed ViewState into allStates(0), what is
> >> >> >>> allStates(1) and why are we passing back allStates - does this
> >> >> >>> overwrite
> >> >> >>> the
> >> >> >>> ViewState that was written out by MyBase.SaveViewState()?
> >> >> >>>
> >> >> >>> Thanks,
> >> >> >>>
> >> >> >>> Tom
> >> >> >>>
> >> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
> >> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
> >> >> >>> > Hi Tom,
> >> >> >>> >
> >> >> >>> > see the remarks here made by a User:
> >> >> >>> >
> >> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
> >> >> >>> >
> >> >> >>> > this method seems to fail when back button is pressed. You can
> >> >> >>> > download
> >> >> >>> > a demo.
> >> >> >>> >
> >> >> >>> > Tommaso
> >> >> >>> >
> >> >> >>> > tshad ha scritto:
> >> >> >>> >
> >> >> >>> >> I was looking for a way to handle refreshes (user pressed
> >> >> >>> >> refresh
> >> >> >>> >> button)
> >> >> >>> >> and found a piece of code to check if a Web page was refreshed
> >> >> >>> >> but
> >> >> >>> >> I
> >> >> >>> >> can't
> >> >> >>> >> get it to work.
> >> >> >>> >>
> >> >> >>> >> The code is:
> >> >> >>> >> ************************************************************
> >> >> >>> >> Namespace StevenBey.Web.UI
> >> >> >>> >>
> >> >> >>> >>  Public Class Page
> >> >> >>> >>    Inherits System.Web.UI.Page
> >> >> >>> >>    Private _refreshState As Boolean
> >> >> >>> >>    Private _isRefresh As Boolean
> >> >> >>> >>
> >> >> >>> >>
> >> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
> >> >> >>> >>     Get
> >> >> >>> >>       Return _isRefresh
> >> >> >>> >>     End Get
> >> >> >>> >>    End Property
> >> >> >>> >>
> >> >> >>> >>
> >> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As Object)
> >> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
> >> >> >>> >>     MyBase.LoadViewState(allStates(0))
> >> >> >>> >>     _refreshState = CBool(allStates(1))
> >> >> >>> >>     _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
> >> >> >>> >>    End Sub 'LoadViewState
> >> >> >>> >>
> >> >> >>> >>
> >> >> >>> >>    Protected Overrides Function SaveViewState() As Object
> >> >> >>> >>     Session("__ISREFRESH") = _refreshState
> >> >> >>> >>     Dim allStates(2) As Object
> >> >> >>> >>     allStates(0) = MyBase.SaveViewState()
> >> >> >>> >>     allStates(1) = Not _refreshState
> >> >> >>> >>     Return allStates
> >> >> >>> >>    End Function 'SaveViewState
> >> >> >>> >>  End Class 'Page
> >> >> >>> >>
> >> >> >>> >> End NameSpace
> >> >> >>> >> ************************************************************
> >> >> >>> >>
> >> >> >>> >> If I do a:
> >> >> >>> >>
> >> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
> >> >> >>> >>
> >> >> >>> >> or
> >> >> >>> >>
> >> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
> >> >> >>> >>
> >> >> >>> >> I get the error:
> >> >> >>> >>
> >> >> >>> >>         BC30456 'IsRefresh' is not a member of
> >> >> >>> >> 'System.Web.UI.Page'
> >> >> >>> >>
> >> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put it
> >> >> >>> >> in
> >> >> >>> >> my
> >> >> >>> >> Bin
> >> >> >>> >> directory.
> >> >> >>> >>
> >> >> >>> >> If you look at trace page you won't see __ISREFRESH?
> >> >> >>> >>
> >> >> >>> >> Is there something else I need to do to get this to work?
> >> >> >>> >>
> >> >> >>> >> Thanks,
> >> >> >>> >>
> >> >> >>> >> Tom
> >> >> >>> >
> >> >> >>
> >> >> >
> >> >> >
> >> >
> >

>
> Thanks you very much,
>
> Tommaso
>
> tshad ha scritto:
>
>> >
>> > Let me know if you find a definitive solution...
>> >
>> Finally got it to work.
>>
>> I used as my basic code the code from
>> http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html.
>>
>> The problem with this code is it doesn't take into account the Initial
>> page
>> load being refreshed, which may not be a problem most of the time.  But
>> if
>> you do any database processing, setting session variables etc. - this
>> could
>> be a problem.
>>
>> What I added was the setting of a session variable to the URL and when I
>> enter the page, if the page is NOT a Post Backed page I compare the
>> current
>> URL with what is in the Session variable.  If they don't match or the
>> Session Variable is not there, then this is not a refresh.  If it is
>> there,
>> then the page was either refreshed or they just reentered the URL in the
>> Browsers Address line (really the same thing).
>>
>> I also found that SVS (SaveViewState) is executed twice if you have
>> tracing
>> on (trace="true"). You'll notice the first SVS is done between events (at
>> least the events that display on the trace page).  I assume this one is
>> the
>> being executed by Trace in some way because right after that the
>> SaveViewState is executed.  If trace is off, you only get the SVS.
>>
>> Also, the trace statement is the only thing that is in my SVS call. So
>> something is calling my SVS event other than the Page SVS and there are
>> no
>> controls on the page.
>>
>> aspx.page Begin Init
>> aspx.page End Init 0.000079 0.000079
>> aspx.page Begin PreRender 0.000116 0.000037
>> aspx.page End PreRender 0.000165 0.000049
>>       Inside refresh.cs at SaveViewState 0.000880 0.000715
>> aspx.page Begin SaveViewState 0.001932 0.001053
>>       Inside refresh.cs at SaveViewState 0.002330 0.000398
>> aspx.page End SaveViewState 0.002384 0.000054
>> aspx.page Begin Render 0.002411 0.000027
>> aspx.page End Render 0.137321 0.134909
>>
>> So what I do set a variable, _firstTime, that I set to false in the 1st
>> SVS
>> so that the 2nd SVS will execute normally but won't set anything.
>>
>> To make this work for only specific pages, you need to add
>> Inherits="MyFunctions.Page" to the Page tag on the page:
>>
>> <%@ Page Language="VB" trace="true" debug="true" ContentType="text/html"
>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page" %>
>>
>> or if you want this to work for every page I believe you can set it in
>> your
>> Web.Config file:
>>
>> <pages Inherits="MyFunctions.Page" />
>>
>> The one problem I have not been able figure out (if you are only doing
>> this
>> for specific pages) is when you load a page (which would set the Session
>> variable) then go directly another set of pages not using this procedure.
>> If you then go back to the 1st page, it will set the session variable set
>> and think this is a refresh, when in fact it isn't.
>>
>> Here is the actual code (in c# as that is what I created this in, but
>> then I
>> converted it to vb for here).
>> ***************************************************************************
>> using System;
>> using System.IO;
>> using System.Web;
>> using System.Web.UI;
>> using System.Web.SessionState;
>>
>> namespace MyFunctions
>> {
>>
>> // This program deals with 2 situations of refresh.
>> // Initial load of a page
>> //  Checks to see if this is a PostBack.
>> //   If not - Checks to see if Session("__LASTPAGEPROCESSED") matches the
>> current URL.
>> //    If it does, the page has either been refreshed or re-entered in the
>> address line of Browser
>> // PostBack
>> //  Checks to see if _refreshState that is stored in the ViewState
>> matches
>> Session["__ISREFRESH"].
>> //   if it does, we have a refresh.  This is because we set the Session
>> variable and put the reverse
>> //   value in the viewstate.  If we refresh the page we get the old
>> viewstate back and the old viewstate
>> //   value should match our new Session value.  Remember we keep
>> reversing
>> the values.
>>
>>  public class Page : System.Web.UI.Page
>>  {
>>   private bool _refreshState;
>>   private bool _isRefresh;
>>
>> // This variable is only important to signify whether SaveViewState is
>> executing for a second time
>> // During the same Page Life Cycle.  Have only seen this when you have
>> tracing on (Trace="true")
>>
>>   private bool _firstTime = true;
>>
>>   public bool IsRefresh
>>   {
>>    get
>>    {
>>     if (!IsPostBack)
>>     {
>>      if ((Session["__INITIALREFRESHPAGE"] != null) &&
>> ((string)Session["__INITIALREFRESHPAGE"] ==
>> HttpContext.Current.Request.Url.ToString()))
>>      {
>> //     Need to set this here as this is a refresh or was re-executed from
>> the URL line.
>> //     In either case, the results are the same.
>>       _isRefresh = true;
>>      }
>>     }
>>     return _isRefresh;
>>    }
>>   }
>>
>>   public bool IsFirstTime
>>   {
>>    get
>>    {
>>     return _firstTime;
>>    }
>>    set
>>    {
>>     _firstTime = value;
>>    }
>>   }
>>
>>   protected override void LoadViewState(object savedState)
>>   {
>>    object[] allStates = (object[]) savedState;
>>    base.LoadViewState(allStates[0]);
>>    _refreshState = (bool) allStates[1];
>>    _isRefresh = _refreshState == (bool) Session["__ISREFRESH"];
>>    Session.Remove("__INITIALREFRESHPAGE");   // Only there to test
>> initial
>> page load refresh
>>   }
>>
>>   protected override object SaveViewState()
>>   {
>>    object[] allStates = new object[2];
>>    allStates[0] = base.SaveViewState();
>>
>> //  This test is mainly when trace="true".  SaveViewState will execute
>> twice
>> and we only need to process this once
>>
>>    if (_firstTime)
>>    {
>> //   This only happens on the initial load of a page where there is no
>> LoadViewState
>>     if (!IsPostBack)
>>     {
>>      Session["__INITIALREFRESHPAGE"] =
>> HttpContext.Current.Request.Url.ToString();
>>     }
>>     Session["__ISREFRESH"] = _refreshState;
>>     allStates[1] = !_refreshState;
>>    }
>>    else
>>    {
>> //    We already reversed _refresh states.  To do it again would put it
>> back
>> the way it was.
>> //   Need to store the _refreshState anyway as we need to return the
>> ViewState.
>>
>>     allStates[1] = !_refreshState;
>>    }
>>    _firstTime = false;
>>    return allStates;
>>   }
>>  }
>> }
>> ****************************************************************************
>>
>> Here is the converted VB code (but I haven't tested it)
>> *****************************************************************
>> Imports System
>> Imports System.IO
>> Imports System.Web
>> Imports System.Web.UI
>> Imports System.Web.SessionState
>>
>> ' This program deals with 2 situations of refresh.
>> ' Initial load of a page
>> '  Checks to see if this is a PostBack.
>> '   If not - Checks to see if Session("__LASTPAGEPROCESSED") matches the
>> current URL.
>> '    If it does, the page has either been refreshed or re-entered in the
>> address line of Browser
>> ' PostBack
>> '  Checks to see if _refreshState that is stored in the ViewState matches
>> Session["__ISREFRESH"].
>> '   if it does, we have a refresh.  This is because we set the Session
>> variable and put the reverse
>> '   value in the viewstate.  If we refresh the page we get the old
>> viewstate
>> back and the old viewstate
>> '   value should match our new Session value.  Remember we keep reversing
>> the values.
>> Public Class Page
>>    Inherits System.Web.UI.Page
>>    Private _refreshState As Boolean
>>    Private _isRefresh As Boolean
>>
>>    ' This variable is only important to signify whether SaveViewState is
>> executing for a second time
>>    ' During the same Page Life Cycle.  Have only seen this when you have
>> tracing on (Trace="true")
>>    Private _firstTime As Boolean = True
>>
>>    Public ReadOnly Property IsRefresh() As Boolean
>>       Get
>>          If Not IsPostBack Then
>>             If Not (Session("__INITIALREFRESHPAGE") Is Nothing) And
>> CStr(Session("__INITIALREFRESHPAGE")) =
>> HttpContext.Current.Request.Url.ToString() Then
>>                '     Need to set this here as this is a refresh or was
>> re-executed from the URL line.
>>                '     In either case, the results are the same.
>>                _isRefresh = True
>>             End If
>>          End If
>>          Return _isRefresh
>>       End Get
>>    End Property
>>
>>    Public Property IsFirstTime() As Boolean
>>       Get
>>          Return _firstTime
>>       End Get
>>       Set
>>          _firstTime = value
>>       End Set
>>    End Property
>>
>>    Protected Overrides Sub LoadViewState(savedState As Object)
>>       Dim allStates As Object() = CType(savedState, Object())
>>       MyBase.LoadViewState(allStates(0))
>>       _refreshState = CBool(allStates(1))
>>       _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>>       Session.Remove("__INITIALREFRESHPAGE") ' Only there to test initial
>> page load refresh
>>    End Sub 'LoadViewState
>>
>>    Protected Overrides Function SaveViewState() As Object
>>       Dim allStates(2) As Object
>>       allStates(0) = MyBase.SaveViewState()
>>
>>       '  This test is mainly when trace="true".  SaveViewState will
>> execute
>> twice and we only need to process this once
>>       If _firstTime Then
>>          '   This only happens on the initial load of a page where there
>> is
>> no LoadViewState
>>          If Not IsPostBack Then
>>             Session("__INITIALREFRESHPAGE") =
>> HttpContext.Current.Request.Url.ToString()
>>          End If
>>          Session("__ISREFRESH") = _refreshState
>>          allStates(1) = Not _refreshState
>>       Else
>>          '    We already reversed _refresh states.  To do it again would
>> put
>> it back the way it was.
>>          '   Need to store the _refreshState anyway as we need to return
>> the
>> ViewState.
>>          allStates(1) = Not _refreshState
>>       End If
>>       _firstTime = False
>>       Return allStates
>>    End Function 'SaveViewState
>> End Class 'Page
>> *****************************************************************************
>>
>> In your code, you only have to check the property:
>>
>> if IsRefresh...
>>
>> Seems to work OK, except for the one problem I stated.
>>
>> Someone mentioned a problem with the backbutton in the other program, but
>> I
>> am not dealing with that here - just a refresh.
>>
>> Tom
>>
>> > Tommaso
>> >
>> > tshad ha scritto:
>> >
>> >> <tommaso.gasta***@uniroma1.it> wrote in message
>> >> news:1156400955.512572.155280@i3g2000cwc.googlegroups.com...
>> >> > Hi Tom,
>> >> >
>> >> > I am afraid that is not exactly an "elementary" topic. Here is a
>> >> > more
>> >> > authoritative source:
>> >> >
>> >> > http://msdn.microsoft.com/msdnmag/issues/04/08/CuttingEdge/
>> >>
>> >> I looked there, but the article is about Script Callbacks.
>> >>
>> >> That was interesting also, as I was looking at doing this (like Ajax)
>> >> but
>> >> in
>> >> .net.
>> >>
>> >> I knew you could do this in .net 1.1, but if what this is saying is
>> >> correct
>> >> then I can't do it.
>> >>
>> >> "ASP.NET 2.0 provides a built-in mechanism for client callbacks based
>> >> on
>> >> the
>> >> services of a COM object that ships with Internet Explorer 5.0 and
>> >> later.
>> >> By
>> >> using the same object, you can implement a script callback mechanism
>> >> in
>> >> ASP.NET 1.x as well"
>> >>
>> >> I don't want to do it if you have to depend on the user using IE.
>> >>
>> >> Thanks,
>> >>
>> >> Tom
>> >>
>> >> >
>> >> > Let us know about the best solution... :)
>> >> >
>> >> > Tommaso
>> >> >
>> >> > tshad ha scritto:
>> >> >
>> >> >> "tshad" <tscheider***@ftsolutions.com> wrote in message
>> >> >> news:%236K%23Q6sxGHA.1788@TK2MSFTNGP05.phx.gbl...
>> >> >> > <tommaso.gasta***@uniroma1.it> wrote in message
>> >> >> > news:1156266995.626762.290720@b28g2000cwb.googlegroups.com...
>> >> >> >> But what about the back button problem.
>> >> >> >> I think that user was right. It doesn't work in that case.
>> >> >> >
>> >> >>
>> >> >> Actually, I did some work with the program and found that it also
>> >> >> doesn't
>> >> >> work on the inital page.  It only works for PostBacks.
>> >> >>
>> >> >> Looking into it I found that since LoadViewState is not called on
>> >> >> an
>> >> >> initial
>> >> >> page load (makes sense as there would be no ViewState saved here),
>> >> >> there
>> >> >> is
>> >> >> nothing to test.
>> >> >>
>> >> >> I need to find some other way to make it work or find a way to find
>> >> >> out
>> >> >> if
>> >> >> the initial page.
>> >> >>
>> >> >> Tom
>> >> >>
>> >> >> > I know that that is also a problem and I am going to address that
>> >> >> > problem
>> >> >> > in a bit.  But I needed to get the refresh problem taken care of
>> >> >> > right
>> >> >> > away.
>> >> >> >
>> >> >> >>
>> >> >> >> The (almost) funny thing is that a guy has copied this article
>> >> >> >> and
>> >> >> >> published it on Code Project site.
>> >> >> >> He also copied the bugs clearly ... :)
>> >> >> >
>> >> >> > I agree.
>> >> >> >
>> >> >> > But that allows someone else to at least get a starting point to
>> >> >> > work
>> >> >> > from.
>> >> >> >
>> >> >> > Tom
>> >> >> >
>> >> >> >>
>> >> >> >> Tommaso
>> >> >> >>
>> >> >> >> tshad ha scritto:
>> >> >> >>
>> >> >> >>> I was able to get it to work after closer reading of the
>> >> >> >>> article.
>> >> >> >>>
>> >> >> >>> *******************************************************************
>> >> >> >>> Namespace MyFunctions
>> >> >> >>>
>> >> >> >>>  Public Class Page
>> >> >> >>>   Inherits System.Web.UI.Page
>> >> >> >>>   Private _refreshState As Boolean
>> >> >> >>>   Private _isRefresh As Boolean
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>   Public ReadOnly Property IsRefresh() As Boolean
>> >> >> >>>    Get
>> >> >> >>>     Return _isRefresh
>> >> >> >>>    End Get
>> >> >> >>>   End Property
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>   Protected Overrides Sub LoadViewState(savedState As Object)
>> >> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >> >> >>>    MyBase.LoadViewState(allStates(0))
>> >> >> >>>    _refreshState = CBool(allStates(1))
>> >> >> >>>    _isRefresh = _refreshState = CBool(Session("__ISREFRESH"))
>> >> >> >>>   End Sub 'LoadViewState
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>   Protected Overrides Function SaveViewState() As Object
>> >> >> >>>    Session("__ISREFRESH") = _refreshState
>> >> >> >>>    Dim allStates(2) As Object
>> >> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >> >> >>>    allStates(1) = Not _refreshState
>> >> >> >>>    Return allStates
>> >> >> >>>   End Function 'SaveViewState
>> >> >> >>>
>> >> >> >>>  End Class 'Page
>> >> >> >>>
>> >> >> >>> End NameSpace
>> >> >> >>> ***********************************************
>> >> >> >>>
>> >> >> >>> In my page, I have to add an inherits:
>> >> >> >>>
>> >> >> >>> <%@ Page Language="VB" trace="true" ContentType="text/html"
>> >> >> >>> ResponseEncoding="iso-8859-1" Inherits="MyFunctions.Page"%>
>> >> >> >>> ...
>> >> >> >>> trace.warn("is Refresh = " & IsRefresh())
>> >> >> >>>
>> >> >> >>> Then it works.
>> >> >> >>>
>> >> >> >>> I am confused as to the code with the "allStates" and how it
>> >> >> >>> works.
>> >> >> >>>
>> >> >> >>> In LoadViewState:
>> >> >> >>>    Dim allStates As Object() = CType(savedState, Object())
>> >> >> >>>    MyBase.LoadViewState(allStates(0))
>> >> >> >>>    _refreshState = CBool(allStates(1))
>> >> >> >>>
>> >> >> >>> It seems to be getting the savedState from the parameters list,
>> >> >> >>> then
>> >> >> >>> I
>> >> >> >>> think
>> >> >> >>> it does the normal LoadViewState passing allStates(0) (which is
>> >> >> >>> really
>> >> >> >>> just
>> >> >> >>> savedState - so why not just pass savedState??).
>> >> >> >>>
>> >> >> >>> Also, what is allStates(1)?
>> >> >> >>>
>> >> >> >>> In SaveViewState:
>> >> >> >>>    Dim allStates(2) As Object
>> >> >> >>>    allStates(0) = MyBase.SaveViewState()
>> >> >> >>>    allStates(1) = Not _refreshState
>> >> >> >>>    Return allStates
>> >> >> >>>
>> >> >> >>> I assume the MyBase.SaveViewState() is just doing the normal
>> >> >> >>> SaveViewState
>> >> >> >>> and passes back the changed ViewState into allStates(0), what
>> >> >> >>> is
>> >> >> >>> allStates(1) and why are we passing back allStates - does this
>> >> >> >>> overwrite
>> >> >> >>> the
>> >> >> >>> ViewState that was written out by MyBase.SaveViewState()?
>> >> >> >>>
>> >> >> >>> Thanks,
>> >> >> >>>
>> >> >> >>> Tom
>> >> >> >>>
>> >> >> >>> <tommaso.gasta***@uniroma1.it> wrote in message
>> >> >> >>> news:1156197021.987178.39040@m73g2000cwd.googlegroups.com...
>> >> >> >>> > Hi Tom,
>> >> >> >>> >
>> >> >> >>> > see the remarks here made by a User:
>> >> >> >>> >
>> >> >> >>> > http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html
>> >> >> >>> >
>> >> >> >>> > this method seems to fail when back button is pressed. You
>> >> >> >>> > can
>> >> >> >>> > download
>> >> >> >>> > a demo.
>> >> >> >>> >
>> >> >> >>> > Tommaso
>> >> >> >>> >
>> >> >> >>> > tshad ha scritto:
>> >> >> >>> >
>> >> >> >>> >> I was looking for a way to handle refreshes (user pressed
>> >> >> >>> >> refresh
>> >> >> >>> >> button)
>> >> >> >>> >> and found a piece of code to check if a Web page was
>> >> >> >>> >> refreshed
>> >> >> >>> >> but
>> >> >> >>> >> I
>> >> >> >>> >> can't
>> >> >> >>> >> get it to work.
>> >> >> >>> >>
>> >> >> >>> >> The code is:
>> >> >> >>> >> ************************************************************
>> >> >> >>> >> Namespace StevenBey.Web.UI
>> >> >> >>> >>
>> >> >> >>> >>  Public Class Page
>> >> >> >>> >>    Inherits System.Web.UI.Page
>> >> >> >>> >>    Private _refreshState As Boolean
>> >> >> >>> >>    Private _isRefresh As Boolean
>> >> >> >>> >>
>> >> >> >>> >>
>> >> >> >>> >>    Public ReadOnly Property IsRefresh() As Boolean
>> >> >> >>> >>     Get
>> >> >> >>> >>       Return _isRefresh
>> >> >> >>> >>     End Get
>> >> >> >>> >>    End Property
>> >> >> >>> >>
>> >> >> >>> >>
>> >> >> >>> >>    Protected Overrides Sub LoadViewState(savedState As
>> >> >> >>> >> Object)
>> >> >> >>> >>     Dim allStates As Object() = CType(savedState, Object())
>> >> >> >>> >>     MyBase.LoadViewState(allStates(0))
>> >> >> >>> >>     _refreshState = CBool(allStates(1))
>> >> >> >>> >>     _isRefresh = _refreshState =
>> >> >> >>> >> CBool(Session("__ISREFRESH"))
>> >> >> >>> >>    End Sub 'LoadViewState
>> >> >> >>> >>
>> >> >> >>> >>
>> >> >> >>> >>    Protected Overrides Function SaveViewState() As Object
>> >> >> >>> >>     Session("__ISREFRESH") = _refreshState
>> >> >> >>> >>     Dim allStates(2) As Object
>> >> >> >>> >>     allStates(0) = MyBase.SaveViewState()
>> >> >> >>> >>     allStates(1) = Not _refreshState
>> >> >> >>> >>     Return allStates
>> >> >> >>> >>    End Function 'SaveViewState
>> >> >> >>> >>  End Class 'Page
>> >> >> >>> >>
>> >> >> >>> >> End NameSpace
>> >> >> >>> >> ************************************************************
>> >> >> >>> >>
>> >> >> >>> >> If I do a:
>> >> >> >>> >>
>> >> >> >>> >>   trace.warn("is Refresh = " & Page.IsRefresh)
>> >> >> >>> >>
>> >> >> >>> >> or
>> >> >> >>> >>
>> >> >> >>> >>   trace.warn("is Refresh = " & IsRefresh)
>> >> >> >>> >>
>> >> >> >>> >> I get the error:
>> >> >> >>> >>
>> >> >> >>> >>         BC30456 'IsRefresh' is not a member of
>> >> >> >>> >> 'System.Web.UI.Page'
>> >> >> >>> >>
>> >> >> >>> >> I took the compiled version (StevenBey.Web.UI.dll) and put
>> >> >> >>> >> it
>> >> >> >>> >> in
>> >> >> >>> >> my
>> >> >> >>> >> Bin
>> >> >> >>> >> directory.
>> >> >> >>> >>
>> >> >> >>> >> If you look at trace page you won't see __ISREFRESH?
>> >> >> >>> >>
>> >> >> >>> >> Is there something else I need to do to get this to work?
>> >> >> >>> >>
>> >> >> >>> >> Thanks,
>> >> >> >>> >>
>> >> >> >>> >> Tom
>> >> >> >>> >
>> >> >> >>
>> >> >> >
>> >> >> >
>> >> >
>> >
>