1、Nuget引入程序集

2、扩展IInterceptor

    public class CusotmInterceptor : IInterceptor
    {
        /// <summary>
        /// 切入者逻辑
        /// 
        /// 使用了Intercept 方法把 要调用的Call方法给包裹起来了
        /// </summary>
        /// <param name="invocation"></param>
        public void Intercept(IInvocation invocation)
        {
            {
                Console.WriteLine("Before");
            }
            invocation.Proceed(); //这句话的执行就是要去执行真实的方法
            {
                Console.WriteLine("After");
            }

        }
    }

3、注册对象和具体之间的关系的时候，需要执行要支持AOP扩展EnableClassInterceptors

builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory());//通过工厂替换，把Autofac整合进来

builder.Host.ConfigureContainer<ContainerBuilder>(containerBuilder =>
{
    containerBuilder.RegisterType<Microphone>().As<IMicrophone>();
    containerBuilder.RegisterType<Power>().As<IPower>();
    containerBuilder.RegisterType<Headphone>().As<IHeadphone>();
    containerBuilder.RegisterType<ApplePhone>().As<IPhone>()
    //.EnableClassInterceptors(); //当前的配置 要支持AOP扩展--通过类来支持
    .EnableInterfaceInterceptors(new ProxyGenerationOptions()
    {
        Selector = new CustomInterceptorSelector()
    });
    containerBuilder.RegisterType<CusotmInterceptor>();
    containerBuilder.RegisterType<CusotmLogInterceptor>();
    containerBuilder.RegisterType<CusotmCacheInterceptor>();


    //注册每个控制器和抽象之间的关系
    var controllerBaseType = typeof(ControllerBase);
    containerBuilder.RegisterAssemblyTypes(typeof(Program).Assembly)
        .Where(t => controllerBaseType.IsAssignableFrom(t) && t != controllerBaseType)
        .PropertiesAutowired(new CusotmPropertySelector()); //支持属性注入

});

   //支持控制器的实例让IOC容器来创建---autofac来创建
   builder.Services.Replace(ServiceDescriptor.Transient<IControllerActivator, ServiceBasedControllerActivator>());

4.把要扩展aop的方法定义为  virtual 方法

    [Intercept(typeof(CusotmInterceptor))]
    public class ApplePhone : IPhone
    {
        public IMicrophone Microphone { get; set; }
        public IHeadphone Headphone { get; set; }
        public IPower Power { get; set; }

        public ApplePhone(IHeadphone iHeadphone)
        {
            this.Headphone = iHeadphone;
            Console.WriteLine("{0}带参数构造函数", this.GetType().Name);
        }

        public virtual void Call()
        {
            Console.WriteLine("{0}打电话", this.GetType().Name); ;
        }

        public void Text()
        {
            Console.WriteLine("{0}发信息", this.GetType().Name); ;
        }
    }

5.把扩展的IInterceptor 也要注册到容器中去

containerBuilder.RegisterType<CusotmInterceptor>();