//日志特性截取类    [Serializable]    [AttributeUsage(AttributeTargets.Method, AllowMultiple = true, Inherited = true)]class LogsAttribute:OnMethodBoundaryAspect    {///<summary>/// 入口参数信息///</summary>        public string EntryText { get; set; }

///<summary>/// 出口参数信息///</summary>        public string ExitText { get; set; }

///<summary>/// 异常信息///</summary>        public string ExceptionText { get; set; }

//进入函数时输出函数的输入参数        public override void OnEntry(MethodExecutionArgs eventArgs)        {            Arguments arguments = eventArgs.Arguments;            StringBuilder sb = new StringBuilder();            ParameterInfo[] parameters = eventArgs.Method.GetParameters();for (int i = 0; arguments != null && i < arguments.Count; i++)            {//进入的参数的值                sb.Append( parameters[i].Name + "=" + arguments[i] + "");            }string message = string.Format("{0}.{1} Method. The Entry Arg Is：{2}",                eventArgs.Method.DeclaringType.FullName, eventArgs.Method.Name, sb.ToString());            Console.WriteLine(message);        }

//退出函数时的函数返回值        public override void OnExit(MethodExecutionArgs eventArgs)        {            Console.WriteLine(string.Format("{0}.{1} Method. The Result Is：{2}",                 eventArgs.Method.DeclaringType.FullName, eventArgs.Method.Name, eventArgs.ReturnValue.ToString()));        }

//函数发生异常时记录异常信息        public override void OnException(MethodExecutionArgs eventArgs)        {            Console.WriteLine(string.Format("{0}.{1} Method. The Exception Is：{2}",                eventArgs.Method.DeclaringType.FullName, eventArgs.Method.Name, eventArgs.Exception.Message));

        }    }

    //截取异常并且处理异常    [Serializable]    [AttributeUsage(AttributeTargets.Method, AllowMultiple = true, Inherited = true)]class ExceptionAttribute:MethodInterceptionAspect    {//调用本函数时截取异常        public override void  OnInvoke(MethodInterceptionArgs args)        {try            {base.OnInvoke(args);            }catch(Exception ex)            {                Console.WriteLine(string.Format("此方法异常信息是：{0}", ex.ToString()));            }        }    }

    class Program    {static void Main(string[] args)        {            Add(3, 5);            Console.WriteLine("-------------------------------------------------------");            Subject(5, 12);            Console.ReadLine();        }

//此函数让我们看其输入参数和返回值的日志记录        [Logs]        [Exception]public static int Add(int a, int b)        {return a + b;           }

//此函数看我们的异常通过自定义Exception特性记录下来        [Logs]        [Exception]public static int Subject(int a, int b)        {

throw new ArgumentException("减法出现异常，需要处理");

return a - b;        }    }