.NET 中有两种方法进行JSON的操作分别需要引用不同的命名空间

1.System.Runtime.Serialization.Json（System.Runtime.Serialization.dll）

public class JsonHelper{    /// 
    /// 生成Json格式    /// 
    /// 
         ///     /// 
         public static string GetJson
     
      (T obj)    {        DataContractJsonSerializer json = new DataContractJsonSerializer(obj.GetType());        using (MemoryStream stream = new MemoryStream())        {            json.WriteObject(stream, obj);            string szJson = Encoding.UTF8.GetString(stream.ToArray()); return szJson;        }    }    /// 
      
    /// 获取Json的Model    /// 
    /// 
          /// 
          /// 
          public static T ParseFromJson
      
       (string szJson)    {        T obj = Activator.CreateInstance
       
        ();        using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson)))        {            DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());            return (T)serializer.ReadObject(ms);        }    }}public class topMenu{    public string id { get; set; }    public string title { get; set; }    public string defaulturl { get; set; }}
       
      
     

具体的操作代码

topMenu t_menu = new topMenu()            {                id = "1",                title = "全局",                defaulturl = "123456"            };List
     
       l_topmenu = new List
      
       ();for (int i = 0; i < 3; i++)            {                l_topmenu.Add(t_menu);            }Response.Write(JsonHelper.GetJson
       
        
         >(l_topmenu));
        
       
      
     

输出结果为：

       [{"defaulturl":"123456","id":"1","title":"全局"},{"defaulturl":"123456","id":"1","title":"全局"},{"defaulturl":"123456","id":"1","title":"全局"}] 

下面利用上面ParseFromJson方法读取Json

     输出结果为：全局

string szJson = @"{""id"":""1"",""title"":""全局"",""defaulturl"":""123456""} ";      topMenu t_menu2 = JsonHelper.ParseFromJson
     
      (szJson);      Response.Write(t_menu2.title);
     

 

2.System.Web.Script.Serialization(System.Web.Extensions.dll)

JavaScriptSerializer jss = new JavaScriptSerializer(); Response.Write( jss.Serialize(l_topmenu ));

string szJson = @"{""id"":""1"",""title"":""全局"",""defaulturl"":""123456""} ";topMenu toptabmenu = jss.Deserialize
     
      (szJson); Response.Write( jss.Serialize(toptabmenu.title));