AJAX :: Collapsible Panel Extender Doesn't Re-expand After Postback?

Jun 29, 2010

Here is my code. The only problem i am facing is that header panel does not expand after a button in content panel postbacks.

The header panel returns to its original state i.e. collapsed but doe not expand on clicking it.


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cause i have put it inside the panel in the inner listview like the example code below.

example(type by hand):

<asp:Listview id=main>
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<asp:Listview id=sub>

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CollapsiblePanelExtender.aspx.cs"
Inherits="CollapsiblePanelExtender" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL]">
<html xmlns="[URL]">
<head runat="server">
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<asp:ScriptManager ID="ScriptManager1" runat="server">
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<asp:Image ID="Image1" runat="server" ImageUrl="~/MasterFiles/images/collapse.jpg" />
AJAX Collapsible Panel Test
<asp:Literal ID="Literal1" runat="server">(Show Details...)</asp:Literal>
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ID="CollapsiblePanelExtender1" runat="server"
SuppressPostBack="True" >
ID="CollapsiblePanelExtender2" runat="server"
SuppressPostBack="True" >
THe header and content
<asp:Panel ID="PanelTitleMain" runat="server" CssClass="collapsePanelHeader">
Application Information
<asp:Panel ID="PanelContentMain" runat="server" CssClass="collapsePanel" >
<ucpers:ucpspers id="ucpspers1" runat="server" />
<asp:Panel ID="PanelTitleAddress" runat="server" CssClass="collapsePanelHeader">
Contact Address Information
<asp:Panel ID="PanelContentAddress" runat="server" CssClass="collapsePanel">
Contact Address
The css
background-color: #E7FBFB;
border: 1px double #2E4d7B;
font-size: 12px;
border: 1px solid #b85dc3;
cursor: pointer;

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Here is my Custom Control's ASP code:


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I am using a grid view as a child control inside a grid view and using an collapsible panel extender to show and hide the child grid.
Here is my code
I am getting the following error:
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var newcpe = $find(cpe);

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