Web Hosting Talk : Web Hosting Main Forums : Programming Discussion : ASP.NET Could not load Assembly

[praveenkv1988]

I am using Windows Server 2008, with IIS7.

Getting the following message.

=========================================
Could not load file or assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
=========================================

Plz. help.

[Mike Johnson]

Do you have your web.config setup properly? For example:

<assemblies>
	<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
	<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
	<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
	<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>

and

<system.webServer>
  <validation validateIntegratedModeConfiguration="false"/>
  <modules>
	<remove name="ScriptModule" />
	<add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
  </modules>
  <handlers>
	<remove name="WebServiceHandlerFactory-Integrated"/>
	<remove name="ScriptHandlerFactory" />
	<remove name="ScriptHandlerFactoryAppServices" />
	<remove name="ScriptResource" />
	<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode"
		 type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
	<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode"
		 type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
	<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
  </handlers>
</system.webServer>

You could also check to make sure the DLL is actually in the GAC.

[praveenkv1988]

I found System.Web.Extensions not there in "C:\WINDOWS\assembly"

How can I install that?

[Mike Johnson]

Have you not installed the .NET Framework feature?

http://www.microsoft.com/downloads/d...displaylang=en

[praveenkv1988]

Thank you. Its working. I was using old version. Just now updated it through your link.