I get error in web.config file

krahman01 · June 22nd, 2010, 09:00 PM

Error 4 Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. c:\inetpub\wwwroot\WebSiteDDL1\web.config 32

The line basically is:

<compilation debug="true">
<assemblies>
<add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
....
---

Imar · June 23rd, 2010, 02:35 AM

Hi there,

And where do you get this? Where does the config code from? And in what version of Visual Studio and .NET? The error message seems to suggest the project relies on AJAX. This used to be a separate download but has now been integrated into .NET in 3.5 and later and as such no longer requires the separate install when using .NET 3.5.

If it's indeed AJAX, try creating a brand new web site in Visual Studio 2008 and then copy over the config from the new project to yours, leaving project specific stuff in place.

Cheers,

Imar

krahman01 · June 23rd, 2010, 05:08 PM

I thought I need to add references to the system.web.extensions.dll and system.web.extensions.design.dll file to the Visual Studio project. I do have those files, but, in later versions of .NET. So, I have to change the target .NET functions if were to use those .dll files. I'm not quite sure how I change the target .NET version in VS 2008 or VS 2010!

Imar · June 24th, 2010, 04:49 AM

Hi there,

For a web site project, right-click the project, choose Property Pages and then in the Build category choose the correct framework.

For a web application project, right-click the project, choose Properties and change the target framework on the Application tab.

Hope this helps,

Imar