Question

I tried using this example: http://www.asp.net/ajaxlibrary/AjaxControlToolkitSampleSite/modalpopup/modalpopup.aspx

<ajaxToolkit:ModalPopupExtender ID="MPE" runat="server"
TargetControlID="LinkButton1"
</ajaxToolkit:ModalPopupExtender>

And try using

MPE.Show(); 

on the C# side but I keep getting an error message:
“The name ‘MPE’ does not exist in the current context” I really don’t know why the C# side can’t see the asp side.

I mean the popup doesn’t have to use ajax but that’s what I was currently trying at the moment.

Answer 1

The modal popup extender needs a control to extend:

<!-- modal popup target - hidden -->
<asp:Button ID="btnModalTarget" runat="server" style="display:none;" />

<cc1:ModalPopupExtender ID="PopupExtender1" runat="server"
    BehaviorID="ModalPopupBehavior1"
    TargetControlID="btnModalTarget"
    PopupControlID="Panel1">     
</cc1:ModalPopupExtender>   
<asp:Panel ID="Panel1" runat="server">
    <!-- popup contents -->
</asp:Panel>

<asp:LinkButton ID="Button1" runat="server" Text="Open" OnClick="Button1_Click" />

Code-behind:

protected void Button1_Click(object sender, EventArgs e)
{
    PopupExtender1.Show();
}