C#怎么实现JSON与对象之间互相转换功能

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1.首先是声明用户信息对象，DataContract修饰类，表示可以被解析成JSON，DataMember修饰属性，Order表示 解析的顺序，另外Lover是数组列表，表示女朋友个数

Address 表示送货地址，DailyRecord  表示日常记录

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization;
namespace FunctionTest.Model
{
  [DataContract]
  public class UserInfo
  {
    [DataMember(Order =0)]
    public string UserName { get; set; }
    [DataMember(Order = 1)]
    public int Age { get; set; }
    [DataMember(Order = 2)]
    public int Gender { get; set; }
    [DataMember(Order =3)]
    public List Lover { get; set; }
    [DataMember(Order = 4)]
    public ContactAddress Address { get; set; }
    [DataMember(Order = 5)]
    public Dictionary DailyRecord {
      get; set;
    }
  }
  [DataContract]
  public class ContactAddress
  {
    [DataMember(Order =0)]
    public string Province { get; set; }
    [DataMember(Order = 1)]
    public string City { get; set; }
    [DataMember(Order = 2)]
    public string Country { get; set; }
    [DataMember(Order = 3)]
    public string Details { get; set; }
  }
}

2.JSON帮助类 核心代码

/// 

/// Json转换成对象
/// 
/// 
/// 
/// 
public static T JsonToObject(string jsonText)
{
  DataContractJsonSerializer s = new DataContractJsonSerializer(typeof(T));
  MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonText));
  T obj = (T)s.ReadObject(ms);
  ms.Dispose();
  return obj;
}
/// 

/// 对象转换成JSON
/// 
/// 
/// 
/// 
public static string ObjectToJSON(T obj)
{
  DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
  string result = string.Empty;
  using (MemoryStream ms = new MemoryStream())
  {
    serializer.WriteObject(ms, obj);
    ms.Position = 0;
    using (StreamReader read = new StreamReader(ms))
    {
      result = read.ReadToEnd();
    }
  }
  return result;
}

3.调用

//1.对象-->JSON
UserInfo info = new UserInfo
{
    Age = 10,
    Gender = 1,
    UserName = "刘德华",
    Lover = new List { "美女1", "美女2", "美女3" },
    Address = new ContactAddress
    {
      Province = "湖南省",
      City = "长沙市",
      Country = "望城县",
      Details = "某旮旯快递找不到的地方"
    },
    DailyRecord = new Dictionary { { "星期一", "吃饭" }, { "星期二", "洗衣服" }, { "星期三", "好事情" } }
};
string json = ObjectToJSON(info);

4.反序列化后的结果

代码如下:

{"UserName":"刘德华","Age":10,"Gender":1,"Lover":["美女1","美女2","美女3"],"Address":{"Province":"湖南省","City":"长沙市","Country":"望城县",
"Details":"某旮旯快递找不到的地方"},"DailyRecord":[{"Key":"星期一","Value":"吃饭"},{"Key":"星期二","Value":"洗衣服"},{"Key":"星期三","Value":"好事情"}]}

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