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using Microsoft.AspNetCore.Hosting; //IWebHostBuilder using Microsoft.AspNetCore.Builder; //IApplicationBuilder using Microsoft.AspNetCore.Http; //WriteAsync using Microsoft.AspNetCore; //webHost using Microsoft.AspNetCore; using System.Threading.Tasks; namespace WebApplication1 { public class Startup { public void Configure(IApplicationBuilder app) { //The order of these things are important. //Only one Middleware should write to the Response. //Do not write to Response before next.Invoke() app.Use(async (context, next) => { context.Items["Greeting"] = "Hello World"; await next.Invoke(); await context.Response.WriteAsync($"{context.Items["Greeting"]}\n"); await context.Response.WriteAsync($"{context.Items["Goodbye"]}\n"); }); app.Use((context, next) => { context.Items["Goodbye"] = "Goodbye for now"; return Task.CompletedTask; }); } } public class Program { public static void Main(string[] args) { CreateWebHostBuilder(args).Build().Run(); } public static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .UseStartup<Startup>() .UseEnvironment("Development"); } } |
결과 :
Hello World Goodbye for now