ASP.NET Core如何不重启获取更改后的配置

1.appsettings.json配置文件中配置数据

{
  "UserName": "Admin"
}

2.Startup文件Configure方法中添加以下配置(热更新主要使用的ChangeToken.OnChange​方法通知设置的回调方法来达到及时更新)

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

 {

            IConfigurationRoot configurationRoot;

            if (env.IsDevelopment())

            {

                app.UseDeveloperExceptionPage();

                configurationRoot = new ConfigurationBuilder().AddJsonFile("appsettings.Development.json", true, true).Build();

            }

            else

            {

                configurationRoot = new ConfigurationBuilder().AddJsonFile("appsettings.json", true, true).Build();

            }

            //string environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");

            //获取配置

            GetAppSettingsModel(configurationRoot.Get());

 

            //配置文件更新后回调更新方法

            ChangeToken.OnChange(() => configurationRoot.GetReloadToken(), () =>

            {

                GetAppSettingsModel(configurationRoot.Get());

            });

}

 

 public void GetAppSettingsModel(AppSettingsModel appSettings)

 {

            AppSettingsConfig.UserName = appSettings.UserName;

            Console.WriteLine($"UserName:{ appSettings.UserName}");

}

 

//配置文件实体模型

 public class AppSettingsModel

 {

        public string UserName { get; set; }

 }

 

  //配置文件数据

public class AppSettingsConfig

  {

        public static string UserName { get; set; }

}