Report Viewer Control (Web) Shows Blank Report

Question

I have a web form containing a ReportViewer control, a DIV element so I can see that the page actually renders. I see that my page properly loads, I see the report service being accessed in Fiddler, but there is never anything displayed.

At present, I'm using a report with static text, no queries on it, in order to ensure that I isolate the issue.

My page is as follows:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ReportViewer.aspx.cs" Inherits="PeopleNet.Web.Views.Reports.ReportViewer" %>

<%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"
    Namespace="Microsoft.Reporting.WebForms" TagPrefix="rsweb" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Scripts>
                <asp:ScriptReference Path="~/scripts/jquery-1.7.2.js" />
                <asp:ScriptReference Path="~/scripts/fixReportViewer.js" />
            </Scripts>
        </asp:ScriptManager>

        <div>
            This is the report viewer page...
        </div>
        <rsweb:ReportViewer ID="ReportViewer1" runat="server"></rsweb:ReportViewer>
    </form>
</body>
</html>

The code to display the report is:

protected void Page_Load(object sender, EventArgs e)
{
    this.ReportViewer1.ServerReport.ReportServerUrl = ConfigurationFacade.ReportServerUri;
    this.ReportViewer1.ServerReport.ReportPath = { path to report name };
    this.ReportViewer1.ServerReport.ReportServerCredentials = new ReportServerCredentials(); // custom class implementing IReportServerCredentials as described in various places around the web, including SO
    this.ReportViewer1.ServerReport.Refresh();
}

My web.config file is configured with the HttpHandlers as required:

<system.web>
    <!-- abbreviated... -->
    <httpHandlers>
        <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" validate="false" />
    </httpHandlers>
</system.web>

And :

<system.webServer>
    <!-- abbreviated... -->
    <handlers>
        <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
    </handlers>
</system.webServer>

The server runs Windows 2008 and SQL Server 2008 R2.

I am using the SQL Server 2012 version of the viewer, as we are in the process of updating our environments to 2012.

I have repeatedly verified that the report is accessible from the ReportManager, with no issues whatsoever.

I have been attempting to access this in IE9, having seen various issues stated with other browsers.

I am presently (for testing only) passing my credentials as the report server credentials. I am a Reporting Services Administrator, as well as a member of the server administrators group on the server.

I have checked both the event log and the ReportServerService log, and have found nothing amiss.

UPDATE: Looks like when change the AsyncRendering to false, and ensure that I don't try to "SetParameters" with an empty collection, this gets mostly cleared up:

this.ReportViewer1.AsyncRendering = false;

What am I missing in the configuration/code here?

Just a silly check/question: have you checked this with a new, basic (e.g. just a textbox with hardcoded text) report as well? Also, can you add which version of the ReportViewer controls you're using? — Jeroen
Yes, at present, I'm using a simple page with static text on it, just to ensure that I can isolate the issue. — reallyJim
Do you still have a problem, or does your update mean that you've resolved it? — Ann L.
"Resolved" is a loaded term here. It's working, but everything about it feels a bit too hack-y. What's async for if I can't use it? Why can't I SetParameters with an empty list? (leaving out whether or not that's a good idea) — reallyJim
Try the same report but this time, add it to your VS project and use it as a LocalReport -- does it work? — udog

John M John M · Accepted Answer · 2015-03-11T18:07:23

My solution to this issue was related to trying to set the report viewer height to 100%. This resulted in no report showing. Changing the height to a px value (ie 900px) got the reportviewer working.

Report Viewer Control (Web) Shows Blank Report

5 Answers