配置MVC

修改Startup文件成如下所示:

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using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace MockSchool
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            // 设置 EnableEndpointRouting 为 false 是为了使用 MVC 默认路由
            //services.AddMvc(a => a.EnableEndpointRouting = false);
            // 使用 AddControllersWithViews 而不使用 AddMvc 是为了不引入 RazorPages 
            // 等未用到的服务
            services.AddControllersWithViews(a => a.EnableEndpointRouting = false);
        }

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

            // 先处理静态文件
            app.UseStaticFiles();

            app.UseMvcWithDefaultRoute();

            app.Run(async (context) =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        }
    }
}