.net core 架构

 

1、IApplicationLifetime 作用，应用程序启动、停止中、停止

public void Configure(IApplicationBuilder app, IHostingEnvironment env,IApplicationLifetime applicationLifetime)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            applicationLifetime.ApplicationStarted.Register(() =>
            {
                Console.WriteLine("Started");
            });
            applicationLifetime.ApplicationStopping.Register(()=> {
                Console.WriteLine("Stoping");
            });
            applicationLifetime.ApplicationStopped.Register(()=> {
                Console.WriteLine("Stopped");
            });
            app.Run(async (context) =>
            {
                await context.Response.WriteAsync($"name=\"{env.ApplicationName}\"");
                await context.Response.WriteAsync($"name=\"{env.ContentRootFileProvider}\"");
                await context.Response.WriteAsync($"name=\"{env.ContentRootPath}\"");
                await context.Response.WriteAsync($"name=\"{env.EnvironmentName}\"");
                await context.Response.WriteAsync($"name=\"{env.WebRootFileProvider}\"");   //不一一输出了  原理一样的
                //await context.Response.WriteAsync($"connectionString=\"{configuration["connectionString:defaultConnectionString"]}\"");
                //await context.Response.WriteAsync($"name=\"{configuration["name"]}\"");
                await context.Response.WriteAsync("Hello World!");
            });

            app.UseMvc();
        }