ASP.NET

Adding HTML controls dynamically in asp.net page

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Join Date: Feb 2008

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ItsMeYuvan ItsMeYuvan is offline

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Adding HTML controls dynamically in asp.net page

Feb 29th, 2008

All,

I am adding HTML controls with runat ="server" dynamically from my asp.net code.

<form id="frm1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" /></div>
<div runat="Server"> <asp

laceHolder ID="p1" runat="server"><%=strControl%></asp

laceHolder></div>
</form>

The code behind has
Public strControl as New string
strControl = "<input type=""hidden"" id=""test"" value=""test1"" runat=""server""/>"

Am able to view the input hidden control when the page is rendered. On click of submit button in page am writing a code like

Dim hdn1 as New HTMLInputHidden
hdn1 = Ctype(FindControl("test"), HTMLInputHidden)

But hdn1 always returns me nothing. is it possible to get the control in the code behind? I think there has to be something missing in my code. Can anyone help?

Thanks in advance.

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Join Date: Sep 2007

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SheSaidImaPregy SheSaidImaPregy is offline

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Re: Adding HTML controls dynamically in asp.net page

Feb 29th, 2008

you cannot add the control like that. There you are just adding an attribute to the HTML input, but it is never rendered as a control. Therefore you cannot find the control on the page.

You would need something like this (untested):

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 ASP.NET Syntax (Toggle Plain Text) 
Dim hdn1 As New HtmlInputHidden
hdn1.value = "test1"
Controls.Add(hdn1)
 
'--onclick:
Dim hdn1 As HtmlInputHidden = CType(FindCOntrol("hdn1"), HtmlInputHidden)
 
response.write(hdn1.value)
 
Dim hdn1 As New HtmlInputHidden
hdn1.value = "test1"
Controls.Add(hdn1)

'--onclick:
Dim hdn1 As HtmlInputHidden = CType(FindCOntrol("hdn1"), HtmlInputHidden)

response.write(hdn1.value)