C#中String类型与json之间相互转换的实现方法

////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

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);
    }
  }
}