这很简单(它也适用于动态对象(类型对象)):

string json = new
System.Web.Script.Serialization.JavaScriptSerializer().Serialize(MYOBJECT);

使用Json。Net库，你可以从Nuget包管理器下载。

序列化为Json字符串:

 var obj = new Lad
        {
            firstName = "Markoff",
            lastName = "Chaney",
            dateOfBirth = new MyDate
            {
                year = 1901,
                month = 4,
                day = 30
            }
        };

var jsonString = Newtonsoft.Json.JsonConvert.SerializeObject(obj);

反序列化到Object:

var obj = Newtonsoft.Json.JsonConvert.DeserializeObject<Lad>(jsonString );

另一个解决方案是使用内置的System.Text.Json(。NET Core 3.0+)，其中对象是自给自足的，不公开所有可能的字段:

通过测试:

using NUnit.Framework;

namespace Intech.UnitTests
{
    public class UserTests
    {
        [Test]
        public void ConvertsItselfToJson()
        {
            var userName = "John";
            var user = new User(userName);

            var actual = user.ToJson();

            Assert.AreEqual($"{{\"Name\":\"{userName}\"}}", actual);
        }
    }
}

一个实现:

using System.Text.Json;
using System.Collections.Generic;

namespace Intech
{
    public class User
    {
        private readonly string name;

        public User(string name)
        {
            this.name = name;
        }

        public string ToJson()
        {
            var params = new Dictionary<string, string>{{"Name", name}};
            return JsonSerializer.Serialize(params);
        }
    }
}

序列化器

 public static void WriteToJsonFile<T>(string filePath, T objectToWrite, bool append = false) where T : new()
{
        var contentsToWriteToFile = JsonConvert.SerializeObject(objectToWrite, new JsonSerializerSettings
        {
            Formatting = Formatting.Indented,
        });
        using (var writer = new StreamWriter(filePath, append))
        {
            writer.Write(contentsToWriteToFile);
        }
}

对象

namespace MyConfig
{
    public class AppConfigurationSettings
    {
        public AppConfigurationSettings()
        {
            /* initialize the object if you want to output a new document
             * for use as a template or default settings possibly when 
             * an app is started.
             */
            if (AppSettings == null) { AppSettings=new AppSettings();}
        }

        public AppSettings AppSettings { get; set; }
    }

    public class AppSettings
    {
        public bool DebugMode { get; set; } = false;
    }
}

实现

var jsonObject = new AppConfigurationSettings();
WriteToJsonFile<AppConfigurationSettings>(file.FullName, jsonObject);

输出

{
  "AppSettings": {
    "DebugMode": false
  }
}

你可以通过使用Newtonsoft.json来实现这一点。安装Newtonsoft。json从NuGet。然后:

using Newtonsoft.Json;

var jsonString = JsonConvert.SerializeObject(obj);

请注意

微软建议不要使用JavaScriptSerializer

请参阅文档页的标题:

对于. net Framework 4.7.2及更高版本，使用System.Text.Json命名空间中的api进行序列化和反序列化。对于早期版本的. net Framework，请使用Newtonsoft.Json。

最初的回答:

你可以使用JavaScriptSerializer类(添加对System.Web.Extensions的引用):

using System.Web.Script.Serialization;

var json = new JavaScriptSerializer().Serialize(obj);

完整的例子:

using System;
using System.Web.Script.Serialization;

public class MyDate
{
    public int year;
    public int month;
    public int day;
}

public class Lad
{
    public string firstName;
    public string lastName;
    public MyDate dateOfBirth;
}

class Program
{
    static void Main()
    {
        var obj = new Lad
        {
            firstName = "Markoff",
            lastName = "Chaney",
            dateOfBirth = new MyDate
            {
                year = 1901,
                month = 4,
                day = 30
            }
        };
        var json = new JavaScriptSerializer().Serialize(obj);
        Console.WriteLine(json);
    }
}