【ASP.NET Core快速入门】（九） RoutingMiddleware介绍以及MVC引入

services.AddRouting();

            //第一种方式
            app.UseRouter(builder=>builder.MapGet("actionfirst",async context =>{
                await context.Response.WriteAsync("this is first action");
            }));

            //第二种方式
            RequestDelegate handler=context=>context.Response.WriteAsync("this is second action");
            var route=new Route(new RouteHandler(handler),"actionsecond",app.ApplicationServices.GetRequiredService<IInlineConstraintResolver>());
            app.UseRouter(route);

            //第三种方式：不常用
            app.Map("/task",taskApp=>{
                taskApp.Run(async context=>{
                    await context.Response.WriteAsync("this is a task");
                });
            });