ASP.NET Core 2.2–第三方依赖注入容器Autofact替换内置IServiceCollection容器 -云博客

ASP.NET Core 2.2–第三方依赖注入容器Autofact替换内置IServiceCollection容器

# 前端 2024-05-05 06:54 0 26 来源：云博客

一、定制第三方依赖注入容器Autofac

1、nuget引入autofac和 Autofac.Extensions.DependencyInjection

2、注释掉原来的IServiceCollection，ConfigureServices需要返回值IServiceProvider

3、new ContainerBuilder实例化容器

4、注册服务

　　a、使用containerBuilder.RegisterType注册服务

　　b、使用containerBuilder.RegisterModule注册服务，通过Module注册

5、返回AutofacServiceProvider 的实例

 　　　　#region 原来的IServiceCollection容器 // This method gets called by the runtime. Use this method to add services to the container. //public void 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); //} #endregion /// <summary> /// 整合Autofac /// 1、引入autofac Autofac.Extensions.DependencyInjection /// 2、ConfigureServices需要返返回值 IServiceProvider /// 3、实例化容器 /// 4、注册服务 /// 5、返回AutofacServiceProvider的实例 /// </summary> /// <param name="services"></param> 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); //1、实例一个容器 ContainerBuilder containerBuilder = new ContainerBuilder(); //services默认的注册服务，还需要处理控制器实例相关的的工作。  containerBuilder.Populate(services); //autofac全权接管了之前这个Service的所有工作 //2、注册服务 containerBuilder.Register(a => new CustomAutofacAOP()); //autofac允许使用Aop //a、使用containerBuilder.RegisterType注册服务 containerBuilder.RegisterType<ApplePhoneService>().As<IPhone>().SingleInstance(); //b、使用containerBuilder.RegisterModule注册服务，通过Module注册 containerBuilder.RegisterModule<CustomAutofacModule>(); IContainer container = containerBuilder.Build(); return new AutofacServiceProvider(container); }

注册服务

namespace Self.David.Core.Service.Utility{ public class CustomAutofacModule : Module { /// <summary> /// 当前这Module专用做服务注册 /// </summary> /// <param name="builder"></param> protected override void Load(ContainerBuilder builder) { builder.RegisterType<DogService>().As<IAnimal>().SingleInstance(); builder.RegisterType<SmsMsgService>().As<IMsg>().SingleInstance(); } }}

接口

namespace Self.David.Core.Interface{ public interface IAnimal { void Running(); }}namespace Self.David.Core.Interface{ public interface IMsg { void SendMsg(); }}namespace Self.David.Core.Interface{ public interface IPhone { void Call(); }}

服务

namespace Self.David.Core.Service{
 public class ApplePhoneService : IPhone { public void Call() { Console.WriteLine($"{nameof(ApplePhoneService)}打电话！"); } }}namespace Self.David.Core.Service{ public class DogService : IAnimal { public void Running() { Console.WriteLine($"{nameof(DogService)}奔跑！"); } }}namespace Self.David.Core.Service{ public class SmsMsgService : IMsg { public void SendMsg() { Console.WriteLine($"{nameof(SmsMsgService)}发送消息！"); } }}

控制器

namespace Self.David.Core.MVC6.Controllers{ /// <summary> /// 在服务中实现AOP /// Autofacr容器替换IServiceCollection容器 /// </summary> public class AutofacDIController : Controller { private IPhone _iPhone = null; public AutofacDIController(IPhone iPhone) { _iPhone = iPhone; } public IActionResult Index() { _iPhone.Call(); return View(); } }}

 /// <summary> /// Autofacr容器替换IServiceCollection容器 /// </summary> public class AutofacDIModuleController : Controller { private IAnimal _iAnimal = null; private IMsg _iMsg = null; public AutofacDIModuleController(IAnimal iAnimal, IMsg iMsg) { _iAnimal = iAnimal; _iMsg = iMsg; } public IActionResult Index() { _iAnimal.Running();//动物奔跑 _iMsg.SendMsg();//发送消息 return View(); } }