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.
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.