Why ReportViewer Control not working on IIS 7?

Why ReportViewer Control not working on IIS 7?


  •  Unable to render ReportViewer in ASP.NET Web Pages while running on IIS7.
  •  You are able to view your reports on Report Manager as well as while you are debugging locally  but not able to view them on IIS7.
  •  You encounter JavaScript error when loading your report page with ReportViewer. Image buttons such as calendar appear as red ‘X’.


  • When you add ReportViewer control is into web page(.aspx), the
    Reserved.ReportViewerWebControl.axd httpHandler is added to System.Web section of the Web.Config file. In IIS7, It should be added under System.WebServer section.
  • IIS7  Handler Mappings doesn’t contain Reserved.ReportViewerWebControl.axd httpHandler, and that’s why not able to render the some ReportViewer elements which is needed by the JavaScript.

Solution : 

1. Open Internet Information Services (IIS) Manger and select Default Web Site.

2. Under IIS Section, Double click on Handler Mappings.

1-Why ReportViewer Control not working on IIS 7

3. From Action Pane (Right Side of Handler Mappings Section), click on Add Managed Handler.

2-Why ReportViewer Control not working on IIS 7

4. Add Managed Handler dialog opens. In that, enter following values.

Request Path : Reserved.ReportViewerWebControl.axd

Type :Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a

Name : Reserved-ReportViewerWebControl-axd

3-Why ReportViewer Control not working on IIS 7

Then click on OK button.

Reserved-ReportViewerWebControl-axd handler is now added to your Handler Mappings list. Also notice that the following line has also been added to your application’s Web.config file under the system.webserver’s handler section:

<add name=”Reserved-ReportViewerWebControl-axd” path=”Reserved.ReportViewerWebControl.axd” verb=”*” type=”Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a” resourceType=”Unspecified” preCondition=”integratedMode” />

Now try to run your report again.