using Autofac.Extras.DynamicProxy;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace aopTest

{

    [Intercept(typeof(CallLogger))]

    public interface IProduct

    {

        string Title { get; set; }

        decimal Price { get; set; }

        string Show();

    }

    [Intercept(typeof(CallLogger))]

    public class Apple : IProduct

    {

        public Apple()

        {

            Title = "苹果";

            Price = 5.0m;

        }

        public string Title { get ; set ; }

        public decimal Price { get ; set; }

        public virtual string Show()

        {

            return $"{Title} - {Price}";

        }

    }

    [Intercept(typeof(CallLogger))]

    public class Book : IProduct

    {

        public Book()

        {

            Title = "Asp.net开发";

            Price = 35.0m;

        }

        public string Title { get; set; }

        public decimal Price { get; set; }

        [Auth("product.show")]

        public virtual string Show()

        {

            Test();

            return $"{Title} - {Price}";

        }

        protected virtual void Test()

        {

            Console.WriteLine("is a test code....");

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace aopTest

{

    [AttributeUsage(AttributeTargets.Method)]

    public class AuthAttribute : Attribute

    {

        public AuthAttribute(string code)

        {

            Code = code;

        }

        public string Code { get; set; }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace aopTest

{

    public class UserInfo

    {

        static LocalDataStoreSlot storeSlot = Thread.AllocateNamedDataSlot("user-info");

        public static void SetUser(string name)

        {

            Thread.SetData(storeSlot, name);

        }

        public static string GetUser()

        {

            return Thread.GetData(storeSlot).ToString();

        }

    }

}

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Castle.DynamicProxy;

namespace aopTest

{

    public class CallLogger : IInterceptor

    {

        TextWriter _output;

        public CallLogger(TextWriter output)

        {

            _output = output;

        }

        public void Intercept(IInvocation invocation)

        {

            Stopwatch stopWatch = new Stopwatch();

            stopWatch.Start();

            string m = invocation.TargetType.ToString() + "." + invocation.Method.Name;

            _output.WriteLine($"方法:{m}调用开始");

            _output.Write("Calling method {0} with parameters {1}... ",

            invocation.Method.Name,

            string.Join(", ", invocation.Arguments.Select(a => (a ?? "").ToString()).ToArray()));

            var authAttribute = invocation.Method.GetCustomAttributes(typeof(AuthAttribute), false).FirstOrDefault();

            if (authAttribute != null)

            {

                var authInfo = (AuthAttribute)authAttribute;

                if (UserInfo.GetUser() != "zhangsan" && authInfo.Code == "product.show")

                {

                    _output.WriteLine($"当前用户{UserInfo.GetUser()}没有方法{m}的访问权限，需要权限{authInfo.Code}");

                }

            }

            invocation.Proceed();

            _output.WriteLine("Done: result was {0}.", invocation.ReturnValue);

            stopWatch.Stop();

            _output.WriteLine($"方法:{m}调用结束，总耗时{stopWatch.ElapsedMilliseconds}毫秒");

        }

    }

}

using Autofac;

using Autofac.Extras.DynamicProxy;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace aopTest

{

    class Program

    {

        static void Main(string[] args)

        {

            var builder = new ContainerBuilder();

            /*builder.RegisterType<Apple>()

                   .As<IProduct>()

                   .EnableInterfaceInterceptors();

            builder.RegisterType<Book>()

                   .As<IProduct>()

                   .EnableInterfaceInterceptors();*/

            builder.RegisterType<Apple>()

                  .As<IProduct>()

                  .EnableClassInterceptors();

            builder.RegisterType<Book>()

                   .As<IProduct>()

                   .EnableClassInterceptors();

            builder.Register(c => new CallLogger(Console.Out));

            var container = builder.Build();

            UserInfo.SetUser("zhaoliu");

            var products = container.Resolve<IEnumerable<IProduct>>();

            products.ToList().ForEach(product => {

                product.Show();

            });

            Console.ReadKey();

        }

    }

}