Good .NET libraries for working with JSON data? [closed]

Answer 1

There is the JavascriptSerialiser which is used by asp.net mvc and asp.net ajax. Also there is the DataContractJsonSerialiser used by WCF. The only problem I have encountered with the JavascriptSerialiser is that it uses funny way to serialise dates, which I do not think will parse into a javascript date. But this is easyly solved by this snippet

    public double MilliTimeStamp()
    {
        DateTime d1 = new DateTime(1970, 1, 1);
        DateTime d2 = DateTime.UtcNow;
        TimeSpan ts = new TimeSpan(d2.Ticks - d1.Ticks);

        return ts.TotalMilliseconds;
    }

Answer 2

Jayrock works well and transparently turns your objects to and from JSON objects providing they have a public constructor. It also creates the script for you so you can just call your web service like a Javascript class.

Example:

public class Person
{
  public string Name { get;set;}
  public int Age { get;set; }

  public Person() { }
}

public class MyService : JsonRpcHandler
{
   [JsonRpcMethod("getBob")]
   public Person GetBob()
   {
       return new Person() { Name="Bob",Age=20};
   }
}

And the Javascript:

var service = new MyService();
var result = service.getBob();
alert(result.name); // JSON objects are camel-cased.

Answer 3

The class JavaScriptSerializer from the System.Web.Script.Serialization namespace provides good JSON serialization/deserialization support.