利用C#序列化和反序列化json

//把对象序列化为json对象
public static string GetJson<T>(T obj)
{
  DataContractJsonSerializer json=new   DataContractJsonSerializer(typeof(T));
  using(MemoryStream ms=new MemoryStream())
  {
      json.WriteObject(ms,obj);
      string szJson=Encoding.UTF8.GetString(ms.ToArray());
      return szJson;  
   }    
}    

//把JSON字符串还原为对象
public static T ParseFormJson<T>(string szJson)
{
  T obj=Activator.CreateInstance<T>();
  using(MemoryStream ms=new MemoryStream(Encoding.UTF8.GetBytes(szJson)))
  {
      DataContractJsonSerializer dcj=new DataContractJsonSerializer(typeof(T));
      return (T)dcj.ReadObject(ms);
   }      
}

　　记住 添加引用 System.ServiceModel.Web 和System.Runtime.Serialization.Json