在上一章中主要和大家分享了在ASP.NET Core中如何使用Autofac替换自带DI进行构造函数的批量依赖注入，本章将和大家继续分享如何使之能够同时支持属性的批量依赖注入。

1、仓储层接口都以“I”开头，以“Repository”结尾。仓储层实现都以“Repository”结尾。

2、服务层接口都以“I”开头，以“Service”结尾。服务层实现都以“Service”结尾。

接下来我们正式进入主题，在上一章的基础上我们再添加一个web项目TianYa.DotNetShare.CoreAutofacDemo，首先来看一下我们的解决方案

本demo的web项目为ASP.NET Core Web 应用程序（.NET Core 2.2） MVC框架，需要引用以下几个程序集：

1、TianYa.DotNetShare.Model 我们的实体层

2、TianYa.DotNetShare.Service 我们的服务层

3、TianYa.DotNetShare.Repository 我们的仓储层， 正常我们的web项目是不应该使用仓储层的，此处我们引用是为了演示IOC依赖注入

4、Autofac 依赖注入基础组件

5、Autofac.Extensions.DependencyInjection 依赖注入.NET Core的辅助组件

其中Autofac和Autofac.Extensions.DependencyInjection需要从我们的NuGet上引用，依次点击下载以下2个包：

接着我们在web项目中添加一个类AutofacModuleRegister.cs用来注册Autofac模块，如下所示：

/// 重写Autofac管道Load方法，在这里注册注入 /// </summary> protected override void Load(ContainerBuilder builder) // builder.RegisterType<StudentRepository>().As<IStudentRepository>().PropertiesAutowired() // .InstancePerLifetimeScope(); // builder.RegisterType<StudentService>().As<IStudentService>().PropertiesAutowired() // .InstancePerLifetimeScope(); builder.RegisterAssemblyTypes(GetAssemblyByName( " TianYa.DotNetShare.Repository " )) .Where(a => a.Name.EndsWith( " Repository " )) .AsSelf().AsImplementedInterfaces().PropertiesAutowired().InstancePerLifetimeScope(); builder.RegisterAssemblyTypes(GetAssemblyByName( " TianYa.DotNetShare.Service " )) .Where(a => a.Name.EndsWith( " Service " )) .AsSelf().AsImplementedInterfaces().PropertiesAutowired().InstancePerLifetimeScope(); // 注册MVC控制器，注册所有到控制器 var controllersTypesInAssembly = typeof (Startup).Assembly.GetExportedTypes() .Where(type => typeof (Microsoft.AspNetCore.Mvc.ControllerBase).IsAssignableFrom(type)).ToArray(); builder.RegisterTypes(controllersTypesInAssembly).PropertiesAutowired(); /// <summary> /// 根据程序集名称获取程序集 /// </summary> /// <param name="assemblyName"> 程序集名称 </param> public static Assembly GetAssemblyByName( string assemblyName) return Assembly.Load(assemblyName); using System.Threading.Tasks; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.AspNetCore.Http; using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Autofac; using Autofac.Extensions.DependencyInjection; namespace TianYa.DotNetShare.CoreAutofacDemo public class Startup public Startup(IConfiguration configuration) Configuration = configuration; public IConfiguration Configuration { get ; } // This method gets called by the runtime. Use this method to add services to the container. public IServiceProvider ConfigureServices(IServiceCollection services) services.Configure <CookiePolicyOptions>(options => // This lambda determines whether user consent for non-essential cookies is needed for a given request. options.CheckConsentNeeded = context => true ; options.MinimumSameSitePolicy = SameSiteMode.None; services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2).AddControllersAsServices(); return RegisterAutofac(services); // 注册Autofac // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env) if (env.IsDevelopment()) app.UseDeveloperExceptionPage(); app.UseExceptionHandler( " /Home/Error " ); app.UseStaticFiles(); app.UseCookiePolicy(); app.UseMvc(routes => routes.MapRoute( name: " default " , template: " {controller=Home}/{action=Index}/{id?} " ); /// <summary> /// 注册Autofac /// </summary> private IServiceProvider RegisterAutofac(IServiceCollection services) // 实例化Autofac容器 var builder = new ContainerBuilder(); // 将services中的服务填充到Autofac中 builder.Populate(services); // 新模块组件注册 builder.RegisterModule<AutofacModuleRegister> (); // 创建容器 var container = builder.Build(); // 第三方IoC容器接管Core内置DI容器 return new AutofacServiceProvider(container); services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2).AddControllersAsServices(); 接下来我们来看看控制器里面怎么弄：

using System.Threading.Tasks; using Microsoft.AspNetCore.Mvc; using TianYa.DotNetShare.CoreAutofacDemo.Models; using TianYa.DotNetShare.Service; using TianYa.DotNetShare.Repository; using TianYa.DotNetShare.Repository.Impl; namespace TianYa.DotNetShare.CoreAutofacDemo.Controllers public class HomeController : Controller /// <summary> /// 定义仓储层学生抽象类对象 /// </summary> private IStudentRepository _stuRepository; /// <summary> /// 定义服务层学生抽象类对象 /// </summary> private IStudentService _stuService; /// <summary> /// 定义服务层学生抽象类对象 /// 属性注入：访问修饰符必须为public，否则会注入失败。 /// </summary> public IStudentService StuService { get ; set ; } /// <summary> /// 定义仓储层学生实现类对象 /// 属性注入：访问修饰符必须为public，否则会注入失败。 /// </summary> public StudentRepository StuRepository { get ; set ; } /// <summary> /// 通过构造函数进行注入 /// 注意：参数是抽象类，而非实现类，因为已经在Startup.cs中将实现类映射给了抽象类 /// </summary> /// <param name="stuRepository"> 仓储层学生抽象类对象 </param> /// <param name="stuService"> 服务层学生抽象类对象 </param> public HomeController(IStudentRepository stuRepository, IStudentService stuService) this ._stuRepository = stuRepository; this ._stuService = stuService; public IActionResult Index() var stu1 = StuRepository.GetStuInfo( " 10000 " ); var stu2 = StuService.GetStuInfo( " 10001 " ); var stu3 = _stuService.GetStuInfo( " 10002 " ); var stu4 = _stuRepository.GetStuInfo( " 1003 " ); string msg = $ " 学号：10000，姓名：{stu1.Name}，性别：{stu1.Sex}，年龄：{stu1.Age}<br /> " ; msg += $ " 学号：10001，姓名：{stu2.Name}，性别：{stu2.Sex}，年龄：{stu2.Age}<br/> " ; msg += $ " 学号：10002，姓名：{stu3.Name}，性别：{stu3.Sex}，年龄：{stu3.Age}<br/> " ; msg += $ " 学号：10003，姓名：{stu4.Name}，性别：{stu4.Sex}，年龄：{stu4.Age}<br/> " ; return Content(msg, " text/html " , System.Text.Encoding.UTF8); public IActionResult Privacy() return View(); [ResponseCache(Duration = 0 , Location = ResponseCacheLocation.None, NoStore = true )] public IActionResult Error() return View( new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });