Hi Telerik Team,

       We have a usercontrol (ucList1) with asp:panel. This panel is return by aproperty. In main page this usercontrol is inside an xmlhttppanel.Radajax Manger is also here and in codebehind like below

RadAjaxManager.AjaxSettings.AddAjaxSetting(radgrid1, ucList1.PNL, RadAjaxLoadingPanel1);

       The main page is a child page of a master page. In main page radgrid is on left side and usercontrol is on right side.On first time loading filtering is working properly.But while trying to filter after on grid row click got an error like

Error: Sys.InvalidOperationException: Could not find UpdatePanel with ID 'ctl00_ContentPlaceHolder1_ctl00_ContentPlaceHolder1_ucEmailTemplateDetail1_pnlHasRecordPanel'. If it is being updated dynamically then it must be inside another UpdatePanel.

waiting for the reply
Dayana M.T

Hello Dayana,

Could you please explain in more detail what is the RadXmlHttpPanel used for? By design the RadXmlHttpPanel should be used for loading static HTML from the server, or a WebService, and the calls to the server are initiated from the client using the RadXmlHttpPanel.set_value("value") JavaScript method.
Moreover the controls within the RadXmlHttpPanel must not initiate postbacks, because the state of the controls will be lost.
A sample source code that shows the issue will help us a lot in resolving it.

Regards,
Pero
the Telerik team