C#教程之C# 对象实例化 用json保存 泛型类 可以很

用于永久化对象，什么程序都行，依赖NewtonSoft。用于json序列化和反序列化。

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConfigHandler
{
    public class ConfigHandler<T>
        where T : class
    {
        const string SAVE_PATH = "jsonconfig/";
        /// <summary>
        /// 单例模式
        /// </summary>
        static T config;
        private ConfigHandler()
        {

        }
        /// <summary>
        /// 获取保存地址，默认是泛型参数T的类型名称
        /// </summary>
        /// <returns></returns>
        private static string GetSavePath()
        {
            if (!Directory.Exists(SAVE_PATH))
            {
                Directory.CreateDirectory(SAVE_PATH);
            }
            return $"{SAVE_PATH}{typeof(T).ToString()}.json";
        }
        /// <summary>
        /// 保存配置
        /// </summary>
        public static void Save(T _config)
        {
            config = _config;
            string json = JsonConvert.SerializeObject(_config);
            try
            {
                using (var sw = new StreamWriter(GetSavePath()))
                {
                    sw.WriteAsync(json);
                }

            }
            catch (Exception)
            {
                throw;
            }
        }
        /// <summary>
        /// 获取配置信息
        /// </summary>
        /// <returns></returns>
        public static T Load()
        {
            if (config == null)
            {
                string json = "";
                try
                {
                    using (var sr = new StreamReader(GetSavePath()))
                    {
                        json = sr.ReadToEnd();
                        if (json != "")
                        {
                            config = JsonConvert.DeserializeObject<T>(json);
                        }
                        else
                        {
                            config = null;
                        }
                    }
                }
                catch (Exception)
                {
                    config = null;
                }
            }
            return config;
        }

    }


}

 demo:

using ConfigHandler;
using ConsoleApplication1;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            MyConfig config = new MyConfig();
            config = new MyConfig();
            config.name = "leiming";
            config.Age = 20;
            config.Time = DateTime.Now;
            ConfigHandler<MyConfig>.Save(config);
            config = ConfigHandler<MyConfig>.Load();
            Console.WriteLine(config.ToString());
            Console.ReadKey();
        }
    }
    class MyConfig
    {
        public int Hello{get;set;}
        public string name { get; set; }
        public int Age { get; set; }
        public DateTime Time { get; set; }
        public override string ToString()
        {
            return $"Name={name},Age={Age},Time={Time.ToShortDateString()}";
        }
    }
}