问题
I am trying to use JavaScriptSerializer in my application.
I initially received
Cannot find JavaScriptSerializer
and I solved it by adding:
using System.Web.Script.Serialization;
But then the sub-keyword Script is underlined with a blue line:
The type or namespace 'Script' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)
So I added to the project a reference to:
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0\System.Web.Extensions.dll
That didn't help. I am still receiving the same blue underline with same error. The reference is marked with an exclamation mark yellow warning:
I tried the suggested solutions on this thread, but as @user781490 indicated, they didn't help in my situation.
Any idea how to resolve this?
回答1:
I found this MSDN forum post which suggests two solutions to your problem.
First solution (not recommended):
Find the .Net Framework 3.5 and 2.0 folder
Copy System.Web.Extensions.dll from 3.5 and System.Web.dll from 2.0 to the application folder
Add the reference to these two assemblies
Change the referenced assemblies property, setting "Copy Local" to true And build to test your application to ensure all code can work
Second solution (Use a different class / library):
The user who had posted the question claimed that Uri.EscapeUriString and How to: Serialize and Deserialize JSON Data helped him replicate the behavior of JavaScriptSerializer.
You could also try to use Json.Net. It's a third party library and pretty powerful.
回答2:
I had the same. Script been underlined. I added a reference to System.Web.Extensions. Thereafter the Script was no longer underlined. Hope this helps someone.
回答3:
Add System.Web.Extensions as a reference to your project
For Ref.
回答4:
Just Add reference to System.Web.Extensions and happy to go.
回答5:
Since JsonSerializer is deprecated in .Net 4.0+ I used http://www.newtonsoft.com/json to solve this issue.
NuGet- > Install-Package Newtonsoft.Json
来源：https://stackoverflow.com/questions/13035192/error-cs0234-the-type-or-namespace-name-script-does-not-exist-in-the-namespac