C#实现JsonString与Object互转

using System;
using System.IO;
using Newtonsoft.Json;
using System.Collections.Generic;
using System.Web.Script.Serialization;
 
namespace TestAutomationUtility.Models
{
    /// <summary>
    /// <para>需要引用程序集 System.Web.Extensions.dll、Newtonsoft.Json.dll</para>
    /// <para>提供了两种方式转换</para>
    /// </summary>
    internal class ConvertToJsonString
    {
        /// <summary>
        /// 把json转集合
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="JsonStr"></param>
        /// <returns></returns>
        public List<T> JSONStringToList<T>(string JsonStr)
        {
            JavaScriptSerializer Serializer = new JavaScriptSerializer();
            List<T> objs = Serializer.Deserialize<List<T>>(JsonStr);
            return objs;
        }
 
        /// <summary>
        /// 把json转对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="JsonStr"></param>
        /// <returns></returns>
        public T JSONStringToEntity<T>(string JsonStr)
        {
            JavaScriptSerializer Serializer = new JavaScriptSerializer();
            T objs = Serializer.Deserialize<T>(JsonStr);
            return objs;
        }
 
        /// <summary>
        /// 把对象转为json
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public string ToString<T>(T t)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            string jsonString = serializer.Serialize(t);
            return jsonString;
        }
 
        /// <summary>
        /// 把list集合转为json
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public string ToString<T>(List<T> ts)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            string jsonString = serializer.Serialize(ts);
            return jsonString;
        }
 
        /// <summary>
        /// object转string
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public string ToStringObject(Object obj)
        {
            string json = Newtonsoft.Json.JsonConvert.SerializeObject(obj);
            return json;
        }
 
        /// <summary>
        /// json转Entity
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="jsonString"></param>
        /// <returns></returns>
        public T StringToEntity<T>(string jsonString)
        {
            T person = JsonConvert.DeserializeObject<T>(jsonString);
            return person;
        }
 
        /// <summary>
        /// json转List
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="jsonString"></param>
        /// <returns></returns>
        public IList<T> StringToEntitys<T>(string jsonString)
        {
            IList<T> person = JsonConvert.DeserializeObject<IList<T>>(jsonString);
            return person;
        }
 
        /// <summary>
        /// 格式化输出json字符串
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        private string ConvertJsonString(string json)
        {
            JsonSerializer serializer = new JsonSerializer();
            TextReader tr = new StringReader(json);
            JsonTextReader jtr = new JsonTextReader(tr);
            object obj = serializer.Deserialize(jtr);
            if (obj != null)
            {
                StringWriter textWriter = new StringWriter();
                JsonTextWriter jsonWriter = new JsonTextWriter(textWriter)
                {
                    Formatting = Formatting.Indented,
                    Indentation = 4,
                    IndentChar = ' '
                };
                serializer.Serialize(jsonWriter, obj);
                return textWriter.ToString();
            }
            else
            {
                return json;
            }
        }
    }
}

Install-Package Newtonsoft.Json

using System;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace JsonToCSharpObject
{
    class Program
    {
        static void Main(string[] args)
        {
            string jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";

            // 将JSON字符串转换为C#对象
            Person person = JsonConvert.DeserializeObject<Person>(jsonString);

            Console.WriteLine($"Name: {person.Name}");
            Console.WriteLine($"Age: {person.Age}");
            Console.WriteLine($"City: {person.City}");

            // 将C#对象转换回JSON字符串
            string jsonFromObject = JsonConvert.SerializeObject(person);

            Console.WriteLine($"JSON from object: {jsonFromObject}");
        }
    }

    public class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string City { get; set; }
    }
}