Enabling Report Viewer in ASP.net

STEP 1:Copy following files in bin folder of your application:   
    Microsoft.ReportViewer.Common.dll
    Microsoft.ReportViewer.WebForms.dll
    Microsoft.ReportViewer.ProcessingObjectModel.dll  

STEP 2: Add following enteries in web.config:

<add assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/> <add assembly="Microsoft.ReportViewer.Common, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/><add assembly="Microsoft.ReportViewer.ProcessingObjectModel, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>

STEP 3: In IIS 7, we need to make sure to configure the ReportViewer handler.
You can follow these steps:

• Open Internet Information Services (IIS) Manager and select your Web application.
• Under IIS area, double-click on Handler Mappings icon.
• At the Action pane on your right, click on Add Managed Handler.
• At the Add Managed Handler dialog, enter the following:
  Request path: Reserved.ReportViewerWebControl.axd
  Type: Microsoft.Reporting.WebForms.HttpHandler
  Name: Reserved-ReportViewerWebControl-axd
• Click OK.