C#序列化和反序列化JSON的两种方法（转载）（三）

　　C#有两种方式序列化和反序列化JSON字符串：

　　第一种是System.Web.Script.Serialization下的JavaScriptSerializer，原生自带的这种方法需要与类绑定，不方便。

　　第二种是Json.NET第三方库方法，既可以与对象绑定，也可以反序列化为更通用的JObject，方便易用，推荐。

一：  JavaScriptSerializer

　　

using System;
using System.Collections.Generic;
using System.Web.Script.Serialization;

namespace ConsoleAppTest
{
    public class Studet
    {
        public string name { get; set; }
        public int age { get; set; }
        public string idCard { get; set; }
        public DateTime birthday { get; set; }
        public List<Hobby> hobbys { get; set; }
    }
    public class Hobby
    {
        public int sort { get; set; }
        public string desc { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            string json = @"{
              ""name"": ""张三"",
              ""age"": 20,
              ""idCard"": ""123456789"",
              ""birthday"": ""2022-10-21 00:00:00"",
              ""hobbys"": [
                {
                  ""sort"": 1,
                  ""desc"": ""写字""
                },
                {
                  ""sort"": 2,
                  ""desc"": ""游泳""
                }
              ]
            }";
            JavaScriptSerializer jss = new JavaScriptSerializer();

            // 反序列化：解析JSON字符串
            Studet student = jss.Deserialize<Studet>(json);
            Console.WriteLine(student.birthday);

            // 序列化：对象转JSON字符串
            string resultJson = jss.Serialize(student);
            Console.WriteLine(resultJson);
            Console.ReadKey();
        }
    }
}

 二：   Json.NET

using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ConsoleAppTest
{
    public class Studet
    {
        public string name { get; set; }
        public int age { get; set; }
        public string idCard { get; set; }
        public DateTime birthday { get; set; }
        public List<Hobby> hobbys { get; set; }
    }
    public class Hobby
    {
        public int sort { get; set; }
        public string desc { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            string json = @"{
              ""name"": ""张三"",
              ""age"": 20,
              ""idCard"": ""123456789"",
              ""birthday"": ""2022-10-21 00:00:00"",
              ""hobbys"": [
                {
                  ""sort"": 1,
                  ""desc"": ""写字""
                },
                {
                  ""sort"": 2,
                  ""desc"": ""游泳""
                }
              ]
            }";
            // 反序列化JSON字符串到对象
            Studet student = JsonConvert.DeserializeObject<Studet>(json);
            Console.WriteLine(student.birthday);

            // 序列化对象到JSON字符串
            string resultJson = JsonConvert.SerializeObject(student);
            Console.WriteLine(resultJson);

            Console.ReadKey();
        }
    }
}

 三：JSON字符串和JObject之间相互转换：JObject.Parse

using System;
using Newtonsoft.Json.Linq;

namespace ConsoleAppTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string json = @"{
              ""name"": ""张三"",
              ""age"": 20,
              ""idCard"": ""123456789"",
              ""birthday"": ""2022-10-21 00:00:00"",
              ""hobbys"": [
                {
                  ""sort"": 1,
                  ""desc"": ""写字""
                },
                {
                  ""sort"": 2,
                  ""desc"": ""游泳""
                }
              ]
            }";

            JObject jobj = JObject.Parse(json);
            Console.WriteLine(jobj["birthday"].ToString());

            JObject jObject = new JObject();
            jObject["name"] = "张三";
            jObject["birthday"] = new DateTime(2022, 10, 21, 16, 11, 9);
            Console.WriteLine(jObject);
            Console.ReadKey();
        }
    }
}

 四：JSON对象数组的四种方法
        对于类似于[{},{}]这种对象数组的字符串有四种方法：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Web.Script.Serialization;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ConsoleAppTest
{
    public class Studet
    {
        public string name { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            string json = @"[{""name"": ""张三""},{""name"": ""李四""}, {""name"": ""王五""}]";

            // 第一种：DataTable
            DataTable dt = JsonConvert.DeserializeObject<DataTable>(json);
            Console.WriteLine(dt.Rows[0][0]);

            // 第二种：JavaScriptSerializer
            JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
            ArrayList arrayList = javaScriptSerializer.Deserialize<ArrayList>(json);
            Dictionary<string, object> dic = (Dictionary<string, object>)arrayList[0];
            Console.WriteLine(dic["name"]);

                // 第三种：JArray
                JArray jArray = JArray.Parse(json);
            Console.WriteLine(jArray[0]["name"]);

            // 第四种：反序列化到对象 DeserializeObject
            List<Studet> list = JsonConvert.DeserializeObject<List<Studet>>(json);
            Console.WriteLine(list[0].name);
            Console.ReadKey();
        }
    }
}

原文地址：https://blog.csdn.net/lilongsy/article/details/127445346