The Type JavaScriptSerializer is not defined

Question

Hi,

in my ASPX-page I'm importing the Namespace:

Imports System.Web.Script.Serialization

and then try to use the class:

Dim Jsonconvert As New JavaScriptSerializer

On my test server this causes no Problems, but on my production Server I get an error, stating that the type JavaScriptSerializer is not defined.

Does anyone know how to fix this?

Answer 1

Hi,

Please try to check that you have added the following to your project:

    using System.Web;
    using System.Web.Script;
    using System.Web.Script.Serialization;

Here is a similar thread, hope it can give your some idea:
http://stackoverflow.com/questions/7000811/cannot-find-javascriptserializer-in-net-4-0 .

Best Regards,
Amy Peng

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Answer 2

Thanks for your suggestions. Unfortunately none of it helped. When I changed my project to target .NET Framework 4, I still couldn't add Version 4.0 of System.Web.Extension, because the System said that I have already referenced it. Explicitly removing it first doesn't seem to be possible either. And I still cannot comprehend why it works without problems on our testing server, as both machines seem to be configured identically.