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Nick
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Cannot refer to object inside UpdatePanel from server
posted

I have a ASP.NET Web Application using VB.NET in Visual Studio 2010 with 2012 Volume 1 (CLR 4.0). I have a button inside an UpdatePanel in an item template, but I cannot refer to it in the server code. The page source is:

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="SimpleExample.aspx.vb"
    Inherits="DataPAEnterpriseWeb.SimpleExample" %>
 
<%@ Register Assembly="Infragistics4.Web.v12.1, Version=12.1.20121.1005, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
    Namespace="Infragistics.Web.UI.NavigationControls" TagPrefix="ig" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <ig:WebExplorerBar ID="WebExplorerBar1" runat="server" Width="250px">
            <Groups>
                <ig:ExplorerBarGroup GroupContentsHeight="" Text="Categories" Expanded="True">
                    <Items>
                        <ig:ExplorerBarItem Text="Item" TemplateId="TreeViewTemplate">
                            <Template>
                                <asp:UpdatePanel ID="TreeViewUpdatePanel" runat="server">
                                    <ContentTemplate>
                                        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
                                    </ContentTemplate>
                                </asp:UpdatePanel>
                            </Template>
                        </ig:ExplorerBarItem>
                    </Items>
                </ig:ExplorerBarGroup>
            </Groups>
            <AutoPostBackFlags ItemClick="Off" />
        </ig:WebExplorerBar>
    </div>
    </form>
</body>
</html>

However, The following:

 

Public Class SimpleExample
  Inherits System.Web.UI.Page

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Button1.Text = "OK"
  End Sub

End Class

Gives the following error "'Button1' is not declared. It may be inaccessible due to its protection level.".