json string 与object 之间的转化

1.将json string转化成object

   1:  public static T GetObjectFromJson<T>(string jsonString)

   2:  {

   3:      DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));

   4:      MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));

   5:      var obj = (T)serializer.ReadObject(stream);

   6:      stream.Close();

   7:      return obj;

   8:  }

2.将obect转化成json string

   1:  public static string GetJsonFromObject<T>(T obj)

   2:  {

   3:      DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T));

   4:      using (MemoryStream ms = new MemoryStream())

   5:      {

   6:          json.WriteObject(ms, obj);

   7:          string szJson = Encoding.UTF8.GetString(ms.ToArray());

   8:          return szJson;

   9:      }

  10:  }

注意，定义的对象T一定要和json 字符串一一对应

e.g: json string {\"ID\":1,\"Items\":[{\"Name\":\"22\"},{\"Name\":\"23\"}]}

定义的对象就必须是：

   1:  [DataContract]

   2:  class Demo

   3:  {
　　　　　　[DataMember]

   4:      public int ID { get; set; }

   5:      [DataMember]

   6:      public List<Student> Items { get; set; }

   7:  }

   8:   

   9:  [DataContract]

  10:  class Student

  11:  {

  12:      [DataMember]

  13:      public string Name { get; set; }

  14:  }

其中T就是Demo 这个类

使用：

   1:   string json = "{\"ID\":1,\"Items\":[{\"Name\":\"22\"},{\"Name\":\"23\"}]}";

   2:   Demo obj = GetObjectFromJson<Demo>(json);