or

<telerik:RadAjaxManager runat="server" DefaultLoadingPanelID="loadingPanel"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="btnLoad"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="rgResults"/> <telerik:AjaxUpdatedControl ControlID="lblResults"/> </UpdatedControls> </telerik:AjaxSetting> <telerik:AjaxSetting AjaxControlID="txtIDs"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="rtb1"/> <telerik:AjaxUpdatedControl ControlID="rtb2"/> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings></telerik:RadAjaxManager><telerik:AjaxUpdatedControl ControlID="rgResults" LoadingPanelID="loadingPanel"/><telerik:AjaxUpdatedControl ControlID="lblResults"/>protected override void OnPreRender(EventArgs e) { base.OnPreRender(e); RadAjaxManager manager = RadAjaxManager.GetCurrent(Page); manager.AjaxSettings.AddAjaxSetting(controlA, controlB, loadingPanel); manager.AjaxSettings.AddAjaxSetting(controlB, controlA, loadingPanel); }<telerik:AjaxSetting AjaxControlID="radFScore"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="radFScore" LoadingPanelID="RadAjaxLoadingPanel1" /> </UpdatedControls></telerik:AjaxSetting><telerik:AjaxSetting AjaxControlID="radFScore"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="btnPreview"/> </UpdatedControls></telerik:AjaxSetting>
