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Resetting the value of a System.Web.UI.HtmlControls.HtmlInputFileI have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to
submit files. After the file is successfully submitted, I want the field to be reset so that the user knows the file was submitted. However, ASP.NET does not let you change the Value property of an HtmlInputFile control. How can I reset the HtmlInputFile control to it's original state? Thanks. Nathan,
A HTML control is not an ASPNET control. If it had extentions to handle it in a better way, than it would be an ASPNET control. Therefore handling an HTML control is as it could be done forever in HTML. In my opinion is than the way to search for it on Google, but than not in relation to DotNet but just as HTML control. Cor Show quoteHide quote "Nathan Sokalski" <njsokal***@hotmail.com> schreef in bericht news:eKwNKqSfGHA.3996@TK2MSFTNGP04.phx.gbl... >I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to >submit files. After the file is successfully submitted, I want the field to >be reset so that the user knows the file was submitted. However, ASP.NET >does not let you change the Value property of an HtmlInputFile control. How >can I reset the HtmlInputFile control to it's original state? Thanks. > -- > Nathan Sokalski > njsokal***@hotmail.com > http://www.nathansokalski.com/ > I think that there is an important lesson you should learn about how ASP.NET
handles controls. Any time you add runat="server" and an ID attribute to a control, whether it is an html control or an ASP.NET webcontrol or any other kind of control, if it is declared ASP.NET will treat it as an object (not necessarily with extensions, it might just be an HtmlGenericControl). But ASP.NET does have a class for the input type="file" control, which is System.Web.UI.HtmlControls.HtmlInputFile One of the properties of this control is Value. The Value property is not labeled as ReadOnly, but when ASP.NET runs into the code where I assign a value to it while my Application is running, it gives me an error saying I cannot change the Value property. If I remember correctly, the same thing happens in JavaScript (although it's been a while since I tried that). I may not have explained every detail with textbook clarity here, but the important thing is that from ASP.NET's view in my code, it is an ASP.NET control. Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:%233UHykWfGHA.1792@TK2MSFTNGP03.phx.gbl... > Nathan, > > A HTML control is not an ASPNET control. If it had extentions to handle it > in a better way, than it would be an ASPNET control. > > Therefore handling an HTML control is as it could be done forever in HTML. > In my opinion is than the way to search for it on Google, but than not in > relation to DotNet but just as HTML control. > > Cor > > "Nathan Sokalski" <njsokal***@hotmail.com> schreef in bericht > news:eKwNKqSfGHA.3996@TK2MSFTNGP04.phx.gbl... >>I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to >>submit files. After the file is successfully submitted, I want the field >>to be reset so that the user knows the file was submitted. However, >>ASP.NET does not let you change the Value property of an HtmlInputFile >>control. How can I reset the HtmlInputFile control to it's original state? >>Thanks. >> -- >> Nathan Sokalski >> njsokal***@hotmail.com >> http://www.nathansokalski.com/ >> > > I am also having difficultly with the htmlinput file control I have a script
to validate the entry if the validation fails I need to return to the form with htmlinputfile value still selected in the input box. The validation is actually failing because of the file description that is entered into another field on the form. I AM SORRY COR to post in this thread but MS does use the HTMLINPUTFILE in documentation and I have not had luck in GOOGLE. Do you think you could tell us where to post this question instead of here? -- Show quoteHide quotecindy "Cor Ligthert [MVP]" wrote: > Nathan, > > A HTML control is not an ASPNET control. If it had extentions to handle it > in a better way, than it would be an ASPNET control. > > Therefore handling an HTML control is as it could be done forever in HTML. > In my opinion is than the way to search for it on Google, but than not in > relation to DotNet but just as HTML control. > > Cor > > "Nathan Sokalski" <njsokal***@hotmail.com> schreef in bericht > news:eKwNKqSfGHA.3996@TK2MSFTNGP04.phx.gbl... > >I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to > >submit files. After the file is successfully submitted, I want the field to > >be reset so that the user knows the file was submitted. However, ASP.NET > >does not let you change the Value property of an HtmlInputFile control. How > >can I reset the HtmlInputFile control to it's original state? Thanks. > > -- > > Nathan Sokalski > > njsokal***@hotmail.com > > http://www.nathansokalski.com/ > > > > > Haven't thoroughly looked at your code, but you may probably want to do the
following: object SaveViewState() { object[] data = new object[2]; data[0] = base.SaveViewState(); date[1] = hash; return data; } LoadViewState(object obj) { if(obj != null && obj is object[]) { object[] data = (object[]) obj; base.LoadViewState(data[0]); Hashtable hash = (Hashtable) data[1]; <<Populate from the hash>> } } Show quoteHide quote "cindy" <cmello@nospam.nospam> wrote in message news:F76F6FB9-316C-4C64-8FF1-5E44B7A1C911@microsoft.com... >I am also having difficultly with the htmlinput file control I have a >script > to validate the entry if the validation fails I need to return to the form > with htmlinputfile value still selected in the input box. The validation > is > actually failing because of the file description that is entered into > another > field on the form. > > I AM SORRY COR to post in this thread but MS does use the HTMLINPUTFILE in > documentation and I have not had luck in GOOGLE. > > Do you think you could tell us where to post this question instead of > here? > -- > cindy > > > "Cor Ligthert [MVP]" wrote: > >> Nathan, >> >> A HTML control is not an ASPNET control. If it had extentions to handle >> it >> in a better way, than it would be an ASPNET control. >> >> Therefore handling an HTML control is as it could be done forever in >> HTML. >> In my opinion is than the way to search for it on Google, but than not in >> relation to DotNet but just as HTML control. >> >> Cor >> >> "Nathan Sokalski" <njsokal***@hotmail.com> schreef in bericht >> news:eKwNKqSfGHA.3996@TK2MSFTNGP04.phx.gbl... >> >I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to >> >submit files. After the file is successfully submitted, I want the field >> >to >> >be reset so that the user knows the file was submitted. However, ASP.NET >> >does not let you change the Value property of an HtmlInputFile control. >> >How >> >can I reset the HtmlInputFile control to it's original state? Thanks. >> > -- >> > Nathan Sokalski >> > njsokal***@hotmail.com >> > http://www.nathansokalski.com/ >> > >> >> >> Cindy,
This is for me always the first start to problems with HTML controls. And this special with the input file one. http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/objects/input_file.asp This can be handled with javascript. In VB.Net the javascript can be used with register.......... Be aware that this have different implementations in version 1.x and 2.0 Cor Show quoteHide quote "cindy" <cmello@nospam.nospam> schreef in bericht news:F76F6FB9-316C-4C64-8FF1-5E44B7A1C911@microsoft.com... >I am also having difficultly with the htmlinput file control I have a >script > to validate the entry if the validation fails I need to return to the form > with htmlinputfile value still selected in the input box. The validation > is > actually failing because of the file description that is entered into > another > field on the form. > > I AM SORRY COR to post in this thread but MS does use the HTMLINPUTFILE in > documentation and I have not had luck in GOOGLE. > > Do you think you could tell us where to post this question instead of > here? > -- > cindy > > > "Cor Ligthert [MVP]" wrote: > >> Nathan, >> >> A HTML control is not an ASPNET control. If it had extentions to handle >> it >> in a better way, than it would be an ASPNET control. >> >> Therefore handling an HTML control is as it could be done forever in >> HTML. >> In my opinion is than the way to search for it on Google, but than not in >> relation to DotNet but just as HTML control. >> >> Cor >> >> "Nathan Sokalski" <njsokal***@hotmail.com> schreef in bericht >> news:eKwNKqSfGHA.3996@TK2MSFTNGP04.phx.gbl... >> >I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to >> >submit files. After the file is successfully submitted, I want the field >> >to >> >be reset so that the user knows the file was submitted. However, ASP.NET >> >does not let you change the Value property of an HtmlInputFile control. >> >How >> >can I reset the HtmlInputFile control to it's original state? Thanks. >> > -- >> > Nathan Sokalski >> > njsokal***@hotmail.com >> > http://www.nathansokalski.com/ >> > >> >> >> I am new to c# I just want to inherit from htmlinputfile control and override
default LoadPostData always returns false I want it to return true it is not security violation because the Value property is readonly. The user then does not have to reselect the file to try upload again. I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to submit files. Before the file is successfully submitted I validate another field on the form, it is the description of the file must be 500 characters. I am adding the file to a site server library programmatically so if the field is too long I want to return the user to the form with file still selected in the HtmlInputFile control. I am using an error label to inform the user to shorten the description. I do not want the user to have to browse again to the same file after he has shortened the description. Right now the file does not upload but the control is empty. ASP.NET does not let me programmatically put the full filename and path back into the Value property of the HtmlInputFile control. How can I do this? I have version asp.net 1.1 I found this but I don't know enough where to start ............. these controls do not save their viewstate. LoadPostData always returns false. You can inherit from the class and override LoadPostData to return true and try to restore the value, and still have value readonly. I am new to c# and asp net controls. is there example to inherit from HtmlInputFile class and override LoadPostData to return true I am using C# and this is challenging me bad. cindy -- Show quoteHide quotecindy "Cor Ligthert [MVP]" wrote: > Cindy, > > This is for me always the first start to problems with HTML controls. And > this special with the input file one. > > http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/objects/input_file.asp > > This can be handled with javascript. > > In VB.Net the javascript can be used with register.......... Be aware that > this have different implementations in version 1.x and 2.0 > > Cor > > > "cindy" <cmello@nospam.nospam> schreef in bericht > news:F76F6FB9-316C-4C64-8FF1-5E44B7A1C911@microsoft.com... > >I am also having difficultly with the htmlinput file control I have a > >script > > to validate the entry if the validation fails I need to return to the form > > with htmlinputfile value still selected in the input box. The validation > > is > > actually failing because of the file description that is entered into > > another > > field on the form. > > > > I AM SORRY COR to post in this thread but MS does use the HTMLINPUTFILE in > > documentation and I have not had luck in GOOGLE. > > > > Do you think you could tell us where to post this question instead of > > here? > > -- > > cindy > > > > > > "Cor Ligthert [MVP]" wrote: > > > >> Nathan, > >> > >> A HTML control is not an ASPNET control. If it had extentions to handle > >> it > >> in a better way, than it would be an ASPNET control. > >> > >> Therefore handling an HTML control is as it could be done forever in > >> HTML. > >> In my opinion is than the way to search for it on Google, but than not in > >> relation to DotNet but just as HTML control. > >> > >> Cor > >> > >> "Nathan Sokalski" <njsokal***@hotmail.com> schreef in bericht > >> news:eKwNKqSfGHA.3996@TK2MSFTNGP04.phx.gbl... > >> >I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to > >> >submit files. After the file is successfully submitted, I want the field > >> >to > >> >be reset so that the user knows the file was submitted. However, ASP.NET > >> >does not let you change the Value property of an HtmlInputFile control. > >> >How > >> >can I reset the HtmlInputFile control to it's original state? Thanks. > >> > -- > >> > Nathan Sokalski > >> > njsokal***@hotmail.com > >> > http://www.nathansokalski.com/ > >> > > >> > >> > >> > > > Hi,
What you mean by reseting ?? is it means that you need to clear the value from the control after the postback ?? -- Show quoteHide quoteDeepson Thomas "Nathan Sokalski" wrote: > I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to > submit files. After the file is successfully submitted, I want the field to > be reset so that the user knows the file was submitted. However, ASP.NET > does not let you change the Value property of an HtmlInputFile control. How > can I reset the HtmlInputFile control to it's original state? Thanks. > -- > Nathan Sokalski > njsokal***@hotmail.com > http://www.nathansokalski.com/ > > > Yes, if the control continues to display the file path after I upload it,
many users will be inclined to think the upload was unsuccessful (even though they will be able to see it in a list on the page). But I also want it to be cleared so that the validator control I use to check that they selected a file is useful. Show quoteHide quote "Deepson Thomas" <DeepsonTho***@discussions.microsoft.com> wrote in message news:AB6B9CB5-C3AC-4F6E-8F47-AADC4DA19863@microsoft.com... > Hi, > What you mean by reseting ?? is it means that you need to clear the value > from the control after the postback ?? > -- > Deepson Thomas > > > "Nathan Sokalski" wrote: > >> I have a System.Web.UI.HtmlControls.HtmlInputFile control that I use to >> submit files. After the file is successfully submitted, I want the field >> to >> be reset so that the user knows the file was submitted. However, ASP.NET >> does not let you change the Value property of an HtmlInputFile control. >> How >> can I reset the HtmlInputFile control to it's original state? Thanks. >> -- >> Nathan Sokalski >> njsokal***@hotmail.com >> http://www.nathansokalski.com/ >> >> >> 
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