aop postsharp的使用:在方法进入/成功/失败/退出时获取方法名和参数值

1.nuget安装postsharp

2.编写attribute标记

[Serializable]
    [AttributeUsage(AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
    public class CustomerExceptionLogAttribute : OnMethodBoundaryAspect
    {
        private ILog logger;

        public CustomerExceptionLogAttribute()
        {
            logger = new TXTLogger();
        }

        public override void OnException(MethodExecutionArgs args)
        {
            base.OnException(args);
            System.Windows.Forms.MessageBox.Show("OnException:" + args.Method.Name);
            //logger.Log(string.Format("{0}:{1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), args.Exception.Message));
        }

        public override void OnEntry(MethodExecutionArgs args)
        {
            var method = args.Method;
            var ps=method.GetParameters();
            var pv = args.Arguments;
            string p = "";
            int index = 0;
            ps.ToList().ForEach(ee=> {
                var val = pv[index]; //参数值
                p+=ee.Name +":"+val+ ":" + ee.ParameterType + "
";
                index++;
            });

            base.OnEntry(args);
            System.Windows.Forms.MessageBox.Show("OnEntry:"+args.Method.Name+"|"+p);
        }

        public override void OnExit(MethodExecutionArgs args)
        {
            base.OnExit(args);
            System.Windows.Forms.MessageBox.Show("OnExit:" + args.Method.Name);
        }

        public override void OnSuccess(MethodExecutionArgs args)
        {
            base.OnSuccess(args);
            System.Windows.Forms.MessageBox.Show("OnSuccess:" + args.Method.Name);
        }

    }

3.使用

[CustomerExceptionLog] //给方法打上标记
        public decimal GetPercent(int a, int b)
        {
            return decimal.Parse(a + "") / decimal.Parse(b + "");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            GetPercent(1, 2);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            var percent = GetPercent(1, 0);
        }

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参考:http://www.cnblogs.com/xingluzhe/p/4738150.html

问题1：如果想对类的所有方法定义统一的异常日志记录的特性，怎么办呢？

如果把特性Targets定义为All或class，可以捕获该类的所有的方法的异常

问题2：如果想对程序集（dll）中每个方法定义异常日志记录的特性，怎么呢？

把特性的Targets定义为all或Assembly，然后在AssemblyInfo.cs文件中，新增程序集的特性

From:http://www.cnblogs.com/xuejianxiyang/p/7065797.html