Hi @
I am using Telerik Rad list boxes in my application The list box's are inside Telerik:RadAjaxPanel. I some time get the following error when the page with RadListbox loads.
This is a show stopper in my application. I am forced to go back to asp:list boxes.
The content page is inside a Nested Master Page and master page contain the Rad tab strip.
Please help me how to get rid of this Issue.
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)
Timestamp: Wed, 9 Mar 2011 09:47:16 UTC
Message: Sys.InvalidOperationException: Component 'ctl00_ctl00_ContentPlaceHolder1_Main_uclFieldSelection_RHSListBox' was not found.
Line: 4599
Char: 25
Code: 0
URI: ScriptResource.axd?d=qlvRxOrmpywM_08z8refchHddcbVZsvK4Ywotss_Ymd_2hJVYkLcDxVnLi_OeSkv8B6tfayteJ6SVeKd7o_DwYe4725KqPpiYzA653aPMP_F0rYUNPf5bufsZONZE3BA1W0wDg2&t=ffffffffcb989f59
I have tried the following options without any success:
1) Made sure that ScriptResource.axd reference is in web.config <httphandlers> and <handlers> section.
2) I have replaced the telerik:radajaxpanel with asp:updatepanel
3) I have removed all the client side events from the list boxes.
4) I have made sure that order of ScriptManager is at the top of any other controls
Please suggest me how to proceed.

Dim Details As HyperLink = DirectCast(e.Item.FindControl("DetailsLink"), HyperLink)
Details is set to nothing.
case "tbrQueryPanel": var filter = contentWin.document.getElementById("filter"); if (filter) { if (filter.style.display == '') { filter.style.display = 'none'; } else { filter.style.display = ''; } } var grid = contentWin.document.getElementById("Grid_RadGrid"); grid.repaint(); break;<telerik:RadScriptManager ID="ScriptManager" runat="server" /> <telerik:RadGrid ID="RadGrid" runat="server" Width="100%" Height="100%" Font-Names="Verdana" GridLines="Horizontal" AllowSorting="True" ShowGroupPanel="True" Skin="Office2007" AllowPaging="True" PageSize="50" AutoPostBack="True"> <MasterTableView> <HeaderStyle Wrap="false" /> </MasterTableView> <ClientSettings AllowDragToGroup="True"> <Scrolling UseStaticHeaders="true" AllowScroll="True" SaveScrollPosition="True"/> <Selecting AllowRowSelect="True" /> <ClientEvents OnRowDblClick="RowDblClick" /> </ClientSettings> <PagerStyle AlwaysVisible="true" /> <ExportSettings ExportOnlyData="true" IgnorePaging="true"/> </telerik:RadGrid>
...