Cannot find JavaScriptSerializer in .Net 4.0
C#Visual StudioJsonserializerC# Problem Overview
I cannot seem to find the JavaScriptSerializer
object nor the the System.Web.Script.Serialization
namespace within Visual Studio 2010. I need to serialize something to JSON what am I supposed to use?
And yes, I already included the System.Web.Extensions
(in System.Web.Extensions.dll) within the project. Which is why I am shocked?
-
I do know
System.Web.Extensions
was marked as obsolete in 3.5
C# Solutions
Solution 1 - C#
Check if you included the .net 4 version of System.Web.Extensions
- there's a 3.5 version as well, but I don't think that one works.
These steps work for me:
- Create a new console application
- Change the target to .net 4 instead of Client Profile
- Add a reference to
System.Web.Extensions
(4.0) - Have access to
JavaScriptSerializer
in Program.cs now :-)
Solution 2 - C#
- Right click
References
and doAdd Reference
, then fromAssemblies->Framework
selectSystem.Web.Extensions
. - Now you should be able to add the following to your class file:
using System.Web.Script.Serialization;
Solution 3 - C#
From the first search result on google:
http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx
> JavaScriptSerializer Class > > Provides serialization and deserialization functionality for AJAX-enabled applications. > > Inheritance Hierarchy > > System.Object > > System.Web.Script.Serialization.JavaScriptSerializer > > Namespace: System.Web.Script.Serialization > > Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
So, include System.Web.Extensions.dll
as a reference.
Solution 4 - C#
I'm using Visual Studio 2015 and finally ran across this post.
Yes in order to use
JavaScriptSerializer json = new JavaScriptSerializer();
You must right click on references and under Assemblies --> Framework choose
System.Web.Extensions
Then add in your reference
using System.Web.Script.Serialization;
Solution 5 - C#
This is how to get JavaScriptSerializer available in your application, targetting .NET 4.0
(full)
using System.Web.Script.Serialization;
This should allow you to create a new JavaScriptSerializer
object!
Solution 6 - C#
using System.Web.Script.Serialization;
is in assembly : System.Web.Extensions (System.Web.Extensions.dll)
Solution 7 - C#
Are you targeting the .NET 4 framework or the .NET 4 Client Profile?
If you're targeting the latter, you won't find that class. You also may be missing a reference, likely to an extensions dll.
Solution 8 - C#
For those who seem to be following the answers above but still have the problem (e.g., see the first comment on the poster's question):
You are probably working in a solution with many projects. The project you appear to be working in references other projects, but you are actually modifying a file from one of the other projects. For example:
- project A references
System.Web.Extensions
- project A references project B
But if the file you are modifying to use System.Web.Script.Serialization
is in project B, then you will need to add a reference to System.Web.Extension
in project B as well.
Solution 9 - C#
Did you include a reference to System.Web.Extensions
? If you click on your first link it says which assembly it's in.
Solution 10 - C#
You have to add the reference to the project.
In Assemblies, there is a System.Web.Extensions Add that.
Once that is done put:
using System.Web;
using System.Web.Script;
using System.Web.Script.Serialization;
That worked for me.
Solution 11 - C#
You can use another option which is the Newtonsoft.Json, you can install it from NuGet Package Manager.
Tools >> Nuget Package Manager >> Package Manager Console by issuing command
Install-Package Newtonsoft.Json
or
by using the GUI at Tools >> Nuget Package Manager >> Manage NuGet Packages for Solution...