Wednesday 4 August 2010

Fix - ASP.NET ReportViewer for SSRS not Rendering in IIS 7.0 or 7.5

Fix - If you are unable to render the ReportViewer Control on your ASP.NET Web pages while running on IIS7, the typical cause of this problem is:
  1. When the ReportViewer control is added to Web Form (.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.
  2. IIS7 Handler Mappings does not contain the Reserved.ReportViewerWebControl.axd httpHandler, and is therefore unable to render the ReportViewer elements needed by the JavaSript.
See  for a fix.