.net core2.0 中使用aspectcore实现aop

一、新建一个web application项目

　　1.1、添加AspectCore.Extensions.DependencyInjection引用

二、实现AbstractInterceptorAttribute类

using AspectCore.DynamicProxy;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
 
namespace WebApplication1
{
    public class MyaspectAttribute : AbstractInterceptorAttribute
    {
        public override Task Invoke(AspectContext context, AspectDelegate next)
        {
            try
            {
                //方法调用之前
                Console.WriteLine("Before");
                return context.Invoke(next);
            }
            catch (Exception)
            {
                //方法抛异常调用
                Console.WriteLine("exception!");
                throw;
            }
            finally
            {
                //方法完成之后调用
                Console.WriteLine("After");
            }
        }
    }
}

三、修改startup

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AspectCore.Configuration;
using AspectCore.Extensions.DependencyInjection;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
 
namespace WebApplication1
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }
 
        public IConfiguration Configuration { get; }
 
        public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
            //1.把ConfigureServices方法的返回值修改为IServiceProvider
            //2.使用core自带的ioc
            services.AddTransient<itest, test>();
            //3.使用代理
            services.AddDynamicProxy(config => {
                //使用通配符的特定全局拦截器
                config.Interceptors.AddTyped<MyaspectAttribute>(Predicates.ForService("*est"));
            });
            return services.BuildAspectCoreServiceProvider();
        }
 
 
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
 
            app.UseMvc();
        }
    }
}