一个非常简单的入门级ASP.NET Core Autofac使用

好好学习，天天向上。

这是结构。

 方法一 在Program中，添加Autofac服务

1：

        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }
        //    public static IHostBuilder CreateHostBuilder(string[] args) =>
        //Host.CreateDefaultBuilder(args)
        //    .ConfigureWebHostDefaults(webBuilder =>
        //    {
        //        webBuilder.UseStartup<Startup>();
        //    }).UseServiceProviderFactory(new AutofacServiceProviderFactory());
        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            .UseServiceProviderFactory(new AutofacServiceProviderFactory())//添加Autofac服务
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });

2： Startup类修改ConfigureContainer方法

  public void ConfigureContainer(ContainerBuilder builder)
        {
          builder.RegisterType<OneService>().As<IOneService>(); 
        }

方法二，  继承module 

1. 创建CustomAutofacModule 类

 public class CustomAutofacModule :Autofac.Module
    {
        /// <summary>
        /// AutoFac注册类
        /// </summary>
        /// <param name="builder"></param>
        protected override void Load(ContainerBuilder builder)
        {
            /*单次注入*/
            builder.RegisterType<OneService>().As<IService>();
           14         }
       24     }

2： Startup类修改ConfigureContainer方法

  public void ConfigureContainer(ContainerBuilder builder)
        {
            // 直接用Autofac注册我们自定义的 
            //
            builder.RegisterModule(new CustomAutofacModule());

        }

批量注入

修改CustomAutofacModule 类 

 public class CustomAutofacModule :Autofac.Module
    {
        /// <summary>
        /// AutoFac注册类
        /// </summary>
        /// <param name="builder"></param>
        protected override void Load(ContainerBuilder builder)
        {
            ///*单次注入*/
            //builder.RegisterType<OneService>().As<IService>();
            //注册Service中的对象,Service中的类要以Service结尾，否则注册失败
            builder.RegisterAssemblyTypes(GetAssemblyByName("Services")).
                Where(a => a.Name.EndsWith("Service")).AsImplementedInterfaces();
        }
        /// <summary>
        /// 根据程序集名称获取程序集
        /// </summary>
        /// <param name="AssemblyName">程序集名称</param>
        /// <returns></returns>
        public static Assembly GetAssemblyByName(String AssemblyName)
        {
            return Assembly.Load(AssemblyName);
        }
    }

之后再控制器注入调用一下就好（接口方法就自己去随便定义一下了，这只是一个初级入门。）

    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        private readonly IOneService _server;
        private readonly IArticleService _articleService;

        public HomeController(ILogger<HomeController> logger, IOneService service, IArticleService articleService)
        {
            _logger = logger;
            _server = service;
            _articleService = articleService;
        }

        public IActionResult Index()
        {
            string a = _server.SayHi();
            string b = _articleService.article();
            return View();
        }

      
    }

不知道如何深入学习， 有哪位能够指点一下学习道路。感激不尽