> I am adding some objects to a standard list box. When I add multiple
> objects, I experience no problems. However, when I add a single object,
> I cannot set the SelectedIndex property to 0 - it stays at -1. Does
> anyone know why this is happening, and how to work around it?
>
> Sample code:
>
>         With lstUsers
>             .BeginUpdate()
>             .Items.Clear()
>             For Each entity As IBusinessEntity In Coll
>                 .Items.Add(entity)
>             Next
>             .EndUpdate()
>         End With
>
> To select the first item in the list:
>
>         If lstUsers.Count > 0 Then
>             lstUsers.SelectedIndex = 0
>         End If
>
> The above code works fine for multiple objects, but with only one
> object the SelectedIndex stays at -1. Setting the SelectedIndex to 0
> doesn't throw an exception, but it never changes.
>
> I need some help with this.
>
> Thanks

> Hi,
>
> I tried your code on both .NET 1.1 and .NET 2.0 except instead of using
> objects I used strings and it works fine. First item is selected wether
> there is one value or multiple values. Did you try entity.toString? Are
> you sure your code compiles? listbox.count is not a valid property. I
> am assuming you meant lstUsers.items.count >0
>
>
> cama***@gmail.com wrote:
> > I am adding some objects to a standard list box. When I add multiple
> > objects, I experience no problems. However, when I add a single object,
> > I cannot set the SelectedIndex property to 0 - it stays at -1. Does
> > anyone know why this is happening, and how to work around it?
> >
> > Sample code:
> >
> >         With lstUsers
> >             .BeginUpdate()
> >             .Items.Clear()
> >             For Each entity As IBusinessEntity In Coll
> >                 .Items.Add(entity)
> >             Next
> >             .EndUpdate()
> >         End With
> >
> > To select the first item in the list:
> >
> >         If lstUsers.Count > 0 Then
> >             lstUsers.SelectedIndex = 0
> >         End If
> >
> > The above code works fine for multiple objects, but with only one
> > object the SelectedIndex stays at -1. Setting the SelectedIndex to 0
> > doesn't throw an exception, but it never changes.
> >
> > I need some help with this.
> >
> > Thanks

> Thanks for the reply.
>
> I can't use the .ToString method because the objects have properties
> and data that I am accessing. It is a really weird problem, but I think
> I've found a workaround. When there is only one object in my
> collection, I do not call .BeginUpdate() and .EndUpdate().
>
> For some reason, when I do that I am able to programmatically select
> the single object in the listbox.
>
>
> Ahmed wrote:
> > Hi,
> >
> > I tried your code on both .NET 1.1 and .NET 2.0 except instead of using
> > objects I used strings and it works fine. First item is selected wether
> > there is one value or multiple values. Did you try entity.toString? Are
> > you sure your code compiles? listbox.count is not a valid property. I
> > am assuming you meant lstUsers.items.count >0
> >
> >
> > cama***@gmail.com wrote:
> > > I am adding some objects to a standard list box. When I add multiple
> > > objects, I experience no problems. However, when I add a single object,
> > > I cannot set the SelectedIndex property to 0 - it stays at -1. Does
> > > anyone know why this is happening, and how to work around it?
> > >
> > > Sample code:
> > >
> > >         With lstUsers
> > >             .BeginUpdate()
> > >             .Items.Clear()
> > >             For Each entity As IBusinessEntity In Coll
> > >                 .Items.Add(entity)
> > >             Next
> > >             .EndUpdate()
> > >         End With
> > >
> > > To select the first item in the list:
> > >
> > >         If lstUsers.Count > 0 Then
> > >             lstUsers.SelectedIndex = 0
> > >         End If
> > >
> > > The above code works fine for multiple objects, but with only one
> > > object the SelectedIndex stays at -1. Setting the SelectedIndex to 0
> > > doesn't throw an exception, but it never changes.
> > >
> > > I need some help with this.
> > >
> > > Thanks

> I am glad you found a work around for the problem. I just tried your
> code with object this time and it also worked fine. Are you sure that:
>
>             lstUsers.SelectedIndex = 0
> is being executed?
>
> cama***@gmail.com wrote:
> > Thanks for the reply.
> >
> > I can't use the .ToString method because the objects have properties
> > and data that I am accessing. It is a really weird problem, but I think
> > I've found a workaround. When there is only one object in my
> > collection, I do not call .BeginUpdate() and .EndUpdate().
> >
> > For some reason, when I do that I am able to programmatically select
> > the single object in the listbox.
> >
> >
> > Ahmed wrote:
> > > Hi,
> > >
> > > I tried your code on both .NET 1.1 and .NET 2.0 except instead of using
> > > objects I used strings and it works fine. First item is selected wether
> > > there is one value or multiple values. Did you try entity.toString? Are
> > > you sure your code compiles? listbox.count is not a valid property. I
> > > am assuming you meant lstUsers.items.count >0
> > >
> > >
> > > cama***@gmail.com wrote:
> > > > I am adding some objects to a standard list box. When I add multiple
> > > > objects, I experience no problems. However, when I add a single object,
> > > > I cannot set the SelectedIndex property to 0 - it stays at -1. Does
> > > > anyone know why this is happening, and how to work around it?
> > > >
> > > > Sample code:
> > > >
> > > >         With lstUsers
> > > >             .BeginUpdate()
> > > >             .Items.Clear()
> > > >             For Each entity As IBusinessEntity In Coll
> > > >                 .Items.Add(entity)
> > > >             Next
> > > >             .EndUpdate()
> > > >         End With
> > > >
> > > > To select the first item in the list:
> > > >
> > > >         If lstUsers.Count > 0 Then
> > > >             lstUsers.SelectedIndex = 0
> > > >         End If
> > > >
> > > > The above code works fine for multiple objects, but with only one
> > > > object the SelectedIndex stays at -1. Setting the SelectedIndex to 0
> > > > doesn't throw an exception, but it never changes.
> > > >
> > > > I need some help with this.
> > > >
> > > > Thanks