SSRS Report Viewer not working with RadAjaxManager

[Robin]

Hello all, 

I have a problem to show AjaxLoadingPanel when loading report in SSRS ReportViewer. I created a simple webpage that contains only one button and one report viewer control. OnClick event of the button, I load the report. It working properly without AjaxManager.
With AjaxManager, I ended with this error message: "Uncaught Sys.InvalidOperationException: Sys.InvalidOperationException: Could not find UpdatePanel with ID 'rptViewer_ReportViewer'. If it is being updated dynamically then it must be inside another UpdatePanel."

I need to use AjaxManager as I need to show loading panel while report was generating. Following is the markup of my page.

<form id="form1" runat="server">
    <%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"
        Namespace="Microsoft.Reporting.WebForms" TagPrefix="rvweb" %>
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" EnablePartialRendering="true">
    </telerik:RadScriptManager>
    <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
    </telerik:RadAjaxLoadingPanel>
    <telerik:RadSkinManager ID="radSkinManager1" runat="server" Skin="WebBlue"></telerik:RadSkinManager>
    <telerik:RadAjaxManager ID="ajaxMgr1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="pnlMain">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="pnlMain" LoadingPanelID="RadAjaxLoadingPanel1" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    <div>
        <asp:Panel ID="pnlMain" runat="server" Style="height: 100vh;">
            <asp:Button ID="btnViewReport" runat="server" Text="View" OnClick="btnViewReport_Click" />
            <hr />
            <rvweb:ReportViewer ID="rptViewer" runat="server" AsyncRendering="false" Height="100%" Width="100%"
                ProcessingMode="Remote" ShowZoomControl="false" SizeToReportContent="true" CssClass="reportBody"
                PageCountMode="Actual" ShowPrintButton="true" ExportContentDisposition="AlwaysInline">
            </rvweb:ReportViewer>
        </asp:Panel>
    </div>
</form>

FYI: In my real project, asp:Panel (pnlMain) is the wrapper of Master Page ContentPlaceHolder. My main intention is to show loading panel on every postback of the whole project.

Please advice.

Thanks in advanced,
Robin

[Viktor Tachev]

Hi Robin,

There are multiple reports of a ReportViewer not working as expected with AJAX. Check out the following resources for additional information.

• https://social.msdn.microsoft.com/Forums/en-US/3c555eb9-6bc2-4155-8233-67462d45fdd1/ajax-reportviewer?forum=vsreportcontrols
• http://stackoverflow.com/questions/159391/reportviewer-control-and-ajax-updatepanel
• http://forums.asp.net/t/1044194.aspx?ReportViewer+inside+UpdatePanel+not+working

Would you try to use Telerik ReportViewer and see if the behavior is different? In order to Ajax-enable the control you can use the approach from the article below:

• Reporting AJAX support

 

Regards,
Viktor Tachev
Telerik