C# 对象实例化 用json保存 泛型类 可以很方便的保存程序设置

参考页面：

http://www.yuanjiaocheng.net/webapi/test-webapi.html

http://www.yuanjiaocheng.net/webapi/web-api-controller.html

http://www.yuanjiaocheng.net/webapi/config-webapi.html

http://www.yuanjiaocheng.net/webapi/web-api-route.html

http://www.yuanjiaocheng.net/webapi/parameter-binding.html

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 = ;            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()}";        }    }}