json string 与object 之间的转化

1.将json string转化成object

public static T GetObjectFromJson<T>(string jsonString)
{
    DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
    MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
    var obj = (T)serializer.ReadObject(stream);
    stream.Close();
    return obj;
}

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：

[DataContract]
class Demo
{
　　　　　　[DataMember]
    public int ID { get; set; }
    [DataMember]
    public List<Student> Items { get; set; }
}

[DataContract]
class Student
{
    [DataMember]
    public string Name { get; set; }
}

其中T就是Demo 这个类

使用：

string json = "{"ID":1,"Items":[{"Name":"22"},{"Name":"23"}]}";
Demo obj = GetObjectFromJson<Demo>(json);