01.Asp.Net Core 3.x 笔记 创建项目

目录

• 创建项目
• 启动方式
• 注册服务
• 依赖注入自己的服务

创建项目

在VS中创建一个空的Asp.Net Core 3.1 Web应用程序

Program.cs

    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }

Startup.cs

    public class Startup
    {
        //注册服务
        public void ConfigureServices(IServiceCollection services)
        {
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        //配置Http请求管道（即：添加配置中间件）
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapGet("/", async context =>
                {
                    await context.Response.WriteAsync("Hello World!");
                });
            });
        }
    }

启动方式

launchSettings.json

{
  "iisSettings": {
    "windowsAuthentication": false, 
    "anonymousAuthentication": true, 
    "iisExpress": {
      "applicationUrl": "http://localhost:4982",
      "sslPort": 44314
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "Three": { //自己宿主，作为控制台应用启动
      "commandName": "Project",
      "launchBrowser": true,
      "applicationUrl": "https://localhost:5001;http://localhost:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    }
  }
}

注册服务

Startup.cs

        //注册服务
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews(); //做Web 应用程序，使用视图页面
            services.AddControllers(); //做webApi应用
        }

依赖注入自己的服务

新建服务接口IClock,及其实现类ChinaClock和 UtcClock
新建文件夹 Controllers，并在其里面新建文件 HomeController 继承 Controller

    public class HomeController : Controller
    {
        public HomeController(IClock clock)
        {

        }
    }

注册自己的服务

        //注册服务
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews(); //做Web 应用程序，使用视图页面  services.AddControllers(); //做webApi应用
            services.AddSingleton<IClock, ChinaClock>(); //添加自己的服务
        }