c# string类型和json之间的相互转换

////Donet2.0 需要添加引用

// 从一个对象信息生成Json串
        public static
string ObjectToJson(object obj)

        {

           return JavaScriptConvert.SerializeObject(obj);

        }

        // 从一个Json串生成对象信息
        public static
object JsonToObject(string jsonString,object obj)

        {

           return JavaScriptConvert.DeserializeObject(jsonString, obj.GetType());

        }

//Donet3.5自带了DLL处理json串

//注意引用：System.Runtime.Serialization，System.ServiceModel.Web

代码
using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Json;
namespace CrjIIOfflineAccept.CrjIITools

{

    public class JsonTools

    {

        // 从一个对象信息生成Json串

        public static string ObjectToJson(object obj)

        {

           DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());

           MemoryStream stream = new MemoryStream();

           serializer.WriteObject(stream, obj);

           byte[] dataBytes = new byte[stream.Length];

           stream.Position = 0;

           stream.Read(dataBytes, 0, (int)stream.Length);

           return Encoding.UTF8.GetString(dataBytes);

        }

        // 从一个Json串生成对象信息

        public static object JsonToObject(string jsonString, object obj)

        {

           DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());

           MemoryStream mStream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));

           return serializer.ReadObject(mStream);

        }

    }

}