Attribute AOP 特性和AOP

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Castle.DynamicProxy;//Castle.Core

namespace MyAttribute.AOPWay
{
    /// 

    /// 使用Castle\DynamicProxy 实现动态代理
    /// 
    public class CastleProxy
    {
        public static void Show()
        {
            User user = new User() { Name = "Eleven", Password = "123123123123" };
            ProxyGenerator generator = new ProxyGenerator();
            MyInterceptor interceptor = new MyInterceptor();
            UserProcessor userprocessor = generator.CreateClassProxy(interceptor);
            userprocessor.RegUser(user);
        }


        public class MyInterceptor : IInterceptor
        {
            public void Intercept(IInvocation invocation)
            {
                PreProceed(invocation);
                invocation.Proceed();
                PostProceed(invocation);
            }
            public void PreProceed(IInvocation invocation)
            {
                Console.WriteLine("方法执行前");
            }

            public void PostProceed(IInvocation invocation)
            {
                Console.WriteLine("方法执行后");
            }
        }

        public interface IUserProcessor
        {
            void RegUser(User user);
        }

        public class UserProcessor : IUserProcessor
        {
            public virtual void RegUser(User user)
            {
                Console.WriteLine("用户已注册。Name:{0},PassWord:{1}", user.Name, user.Password);
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AOPWay
{
    /// 

    /// 装饰器模式实现静态代理
    /// AOP 在方法前后增加自定义的方法
    /// 
    public class Decorator
    {
        public static void Show()
        {
            User user = new User() { Name = "Eleven", Password = "123123123123" };
            IUserProcessor processor = new UserProcessor();
            processor = new UserProcessorDecorator(processor);
            processor.RegUser(user);
        }

        public interface IUserProcessor
        {
            void RegUser(User user);
        }
        public class UserProcessor : IUserProcessor
        {
            public void RegUser(User user)
            {
                Console.WriteLine("用户已注册。Name:{0},PassWord:{1}", user.Name, user.Password);
            }
        }

        /// 

        /// 装饰器的模式去提供一个AOP功能
        /// 
        public class UserProcessorDecorator : IUserProcessor
        {
            private IUserProcessor UserProcessor { get; set; }
            public UserProcessorDecorator(IUserProcessor userprocessor)
            {
                UserProcessor = userprocessor;
            }

            public void RegUser(User user)
            {
                PreProceed(user);
                try
                {
                    this.UserProcessor.RegUser(user);
                }
                catch (Exception)
                {

                    throw;
                }
                PostProceed(user);
            }

            public void PreProceed(User user)
            {
                Console.WriteLine("方法执行前");
            }

            public void PostProceed(User user)
            {
                Console.WriteLine("方法执行后");
            }
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AOPWay
{

    public class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Password { get; set; }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Proxies;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AOPWay
{
    /// 

    /// 使用.Net Remoting/RealProxy 实现动态代理
    /// 
    public class Proxy
    {
        public static void Show()
        {
            User user = new User() { Name = "Eleven", Password = "123123123123" };

            //UserProcessor processor = new UserProcessor();

            UserProcessor userprocessor = TransparentProxy.Create();
            userprocessor.RegUser(user);
        }

        public class MyRealProxy : RealProxy
        {
            private T tTarget;
            public MyRealProxy(T target)
                : base(typeof(T))
            {
                this.tTarget = target;
            }

            public override IMessage Invoke(IMessage msg)
            {
                PreProceede(msg);
                IMethodCallMessage callMessage = (IMethodCallMessage)msg;
                object returnValue = callMessage.MethodBase.Invoke(this.tTarget, callMessage.Args);
                PostProceede(msg);
                return new ReturnMessage(returnValue, new object[0], 0, null, callMessage);
            }
            public void PreProceede(IMessage msg)
            {
                Console.WriteLine("方法执行前");
            }
            public void PostProceede(IMessage msg)
            {
                Console.WriteLine("方法执行后");
            }
        }

        //TransparentProxy
        public static class TransparentProxy
        {
            public static T Create()
            {
                T instance = Activator.CreateInstance();
                MyRealProxy realProxy = new MyRealProxy(instance);
                T transparentProxy = (T)realProxy.GetTransparentProxy();
                return transparentProxy;
            }
        }

        public interface IUserProcessor
        {
            void RegUser(User user);
        }

        public class UserProcessor : MarshalByRefObject, IUserProcessor
        {
            public void RegUser(User user)
            {
                Console.WriteLine("用户已注册。用户名称{0} Password{1}", user.Name, user.Password);
            }
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Microsoft.Practices.Unity.InterceptionExtension;//InterceptionExtension扩展
using Microsoft.Practices.Unity;
namespace MyAttribute.AOPWay
{
    /// 

    /// 使用EntLib\PIAB Unity 实现动态代理
    /// 
    public class UnityAOP
    {
        public static void Show()
        {
            User user = new User()
            {
                Name = "Eleven",
                Password = "123123123123"
            };

            IUnityContainer container = new UnityContainer();//声明一个容器
            container.RegisterType();//声明UnityContainer并注册IUserProcessor
            IUserProcessor processor = container.Resolve();
            processor.RegUser(user);//调用

            container.AddNewExtension().Configure()
                .SetInterceptorFor(new InterfaceInterceptor());


            //IUserProcessor userprocessor = new UserProcessor();
            IUserProcessor userprocessor = container.Resolve();

            Console.WriteLine("********************");
            userprocessor.RegUser(user);//调用
            //userprocessor.GetUser(user);//调用
        }

        #region 特性对应的行为
        public class UserHandler : ICallHandler
        {
            public int Order { get; set; }
            public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
            {
                User user = input.Inputs[0] as User;
                if (user.Password.Length < 10)
                {
                    return input.CreateExceptionMethodReturn(new Exception("密码长度不能小于10位"));
                }
                Console.WriteLine("参数检测无误");


                IMethodReturn methodReturn = getNext.Invoke().Invoke(input, getNext);

                //Console.WriteLine("已完成操作");

                return methodReturn;
            }
        }

        public class LogHandler : ICallHandler
        {
            public int Order { get; set; }
            public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
            {
                User user = input.Inputs[0] as User;
                string message = string.Format("RegUser:Username:{0},Password:{1}", user.Name, user.Password);
                Console.WriteLine("日志已记录，Message:{0},Ctime:{1}", message, DateTime.Now);
                return getNext()(input, getNext);
            }
        }


        public class ExceptionHandler : ICallHandler
        {
            public int Order { get; set; }
            public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
            {
                IMethodReturn methodReturn = getNext()(input, getNext);
                if (methodReturn.Exception == null)
                {
                    Console.WriteLine("无异常");
                }
                else
                {
                    Console.WriteLine("异常:{0}", methodReturn.Exception.Message);
                }
                return methodReturn;
            }
        }

        public class AfterLogHandler : ICallHandler
        {
            public int Order { get; set; }
            public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
            {
                IMethodReturn methodReturn = getNext()(input, getNext);
                User user = input.Inputs[0] as User;
                string message = string.Format("RegUser:Username:{0},Password:{1}", user.Name, user.Password);
                Console.WriteLine("完成日志，Message:{0},Ctime:{1},计算结果{2}", message, DateTime.Now, methodReturn.ReturnValue);
                return methodReturn;
            }
        }
        #endregion 特性对应的行为

        #region 特性
        public class UserHandlerAttribute : HandlerAttribute
        {
            public override ICallHandler CreateHandler(IUnityContainer container)
            {
                ICallHandler handler = new UserHandler() { Order = this.Order };
                return handler;
            }
        }

        public class LogHandlerAttribute : HandlerAttribute
        {
            public override ICallHandler CreateHandler(IUnityContainer container)
            {
                return new LogHandler() { Order = this.Order };
            }
        }

        public class ExceptionHandlerAttribute : HandlerAttribute
        {
            public override ICallHandler CreateHandler(IUnityContainer container)
            {
                return new ExceptionHandler() { Order = this.Order };
            }
        }

        public class AfterLogHandlerAttribute : HandlerAttribute
        {
            public override ICallHandler CreateHandler(IUnityContainer container)
            {
                return new AfterLogHandler() { Order = this.Order };
            }
        }
        #endregion 特性

        #region 业务
        [UserHandlerAttribute(Order = 1)]
        [ExceptionHandlerAttribute(Order = 3)]
        [LogHandlerAttribute(Order = 2)]
        [AfterLogHandlerAttribute(Order = 5)]
        public interface IUserProcessor
        {
            void RegUser(User user);
            User GetUser(User user);
        }

        public class UserProcessor : IUserProcessor//MarshalByRefObject,
        {
            public void RegUser(User user)
            {
                Console.WriteLine("用户已注册。");
                //throw new Exception("11");
            }

            public User GetUser(User user)
            {
                return user;
            }
        }
        #endregion 业务

        /*
         TransparentProxyInterceptor：直接在类的方法上进行标记，但是这个类必须继承MarshalByRefObject...不建议用
         VirtualMethod：直接在类的方法上进行标记，但这个方法必须是虚方法（就是方法要带virtual关键字）
         InterfaceInterceptor：在接口的方法上进行标记，这样继承这个接口的类里实现这个接口方法的方法就能被拦截
         */
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AttributeExtend
{
    public class BaseDAL
    {
        /// 

        /// 校验而且保存
        /// 
        /// 
        /// 
        public static void Save(T t)
        {
            bool isSafe = true;

            Type type = t.GetType();

            foreach (var property in type.GetProperties())
            {
                object[] oAttributeList = property.GetCustomAttributes(true);
                foreach (var item in oAttributeList)
                {
                    if (item is IntValidateAttribute)
                    {
                        IntValidateAttribute attribute = item as IntValidateAttribute;
                        isSafe = attribute.Validate((int)property.GetValue(t));
                    }
                }
                if (!isSafe)
                    break;
            }

            if (isSafe)
                Console.WriteLine("保存到数据库");
            else
                Console.WriteLine("数据不合法");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AttributeExtend
{
    public enum UserState
    {
        /// 

        /// 正常
        /// 
        [Remark("正常")]
        Normal = 0,
        /// 

        /// 冻结
        /// 
        [Remark("冻结")]
        Frozen = 1,
        /// 

        /// 删除
        /// 
        [Remark("删除")]
        Delete = 2
    }

    //public enum UserState1
    //{
    //    /// 

    //    /// 正常
    //    /// 
    //    [Remark("正常")]
    //    正常 = 0,
    //    /// 

    //    /// 冻结
    //    /// 
    //    [Remark("冻结")]
    //    冻结 = 1,
    //    /// 

    //    /// 删除
    //    /// 
    //    [Remark("删除")]
    //    删除 = 2
    //}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AttributeExtend
{
    public class RemarkAttribute : Attribute
    {
        public RemarkAttribute(string remark)
        {
            _Remark = remark;
        }

        private string _Remark;

        public string Remark
        {
            get
            {
                return _Remark;
            }
        }
    }


    public static class RemarkExtend
    {
        public static string GetRemark(this Enum eValue)
        {
            Type type = eValue.GetType();
            FieldInfo field = type.GetField(eValue.ToString());
            RemarkAttribute remarkAttribute = (RemarkAttribute)field.GetCustomAttribute(typeof(RemarkAttribute));
            return remarkAttribute.Remark;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute.AttributeExtend
{
    [AttributeUsage(AttributeTargets.Property)]
    public class IntValidateAttribute : Attribute
    {

        private int _Min = 0;
        private int _Max = 0;

        public IntValidateAttribute(int min, int max)
        {
            this._Min = min;
            this._Max = max;
        }

        public bool Validate(int num)
        {
            return num > this._Min && num < this._Max;
        }


    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    /// 

    /// 特性是一个继承或者间接继承Attribute的类
    /// 通常用attribute结尾，那么在使用的时候，可以去掉这个结尾
    /// 
    /// 

    [AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = true)]
    public class CustomAttribute : Attribute
    {
        public CustomAttribute()
        { }

        public CustomAttribute(int id)
        { }

        public CustomAttribute(int id, string name)
        { }

        public string Remark { get; set; }

        public string Description = null;

        public void Show()
        { }
    }

    public class TableAttribute : Attribute
    {
        private string _TableName = null;

        public TableAttribute(string tableName)
        {
            this._TableName = tableName;
        }

        public string GetTableName()
        {
            return this._TableName;
        }

    }

    public class CustomChildAttribute : CustomAttribute
    {
    }

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    public static class Extend
    {
        /// 

        /// 根据类型获取表名称
        /// 
        /// 
        /// 
        /// 
        public static string GetTableName(this T t) where T : new()
        {
            Type type = t.GetType();
            object[] oAttributeList = type.GetCustomAttributes(true);
            foreach (var item in oAttributeList)
            {
                if (item is TableAttribute)
                {
                    TableAttribute attribute = item as TableAttribute;
                    return attribute.GetTableName();
                }
            }

            return type.Name;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    /// 

    /// 这里是注释，除了让人看懂这里写的是什么，对运行没有任何影响
    /// 
    //[Obsolete("请不要使用这个了，请使用什么来代替", true)]
    [Serializable]
    public class People
    {
        //[Obsolete("请不要使用这个了1")]

        public int Id { get; set; }
        public string Name { get; set; }
    }
}

using MyAttribute.AOPWay;
using MyAttribute.AttributeExtend;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyAttribute
{
    /// 

    /// 1 特性attribute，和注释有什么区别
    /// 特性可以影响编译
    /// 特性可以影响运行
    /// 2 声明和使用attribute
    /// 3 应用attribute
    /// 特性就是在不影响类型封装的前提下，额外的添加一些信息
    /// 如果你用这个信息，那特性就有用，
    /// 如果你不管这个信息，那特性就没用
    /// 
    /// 4 AOP面向切面编程 
    /// Aspect Oriented Programming
    /// OOP 面向对象编程
    /// 
    /// 5 多种方式实现AOP
    /// 
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("今天的内容是特性和AOP===================================");
                People people = new People();

                UserModel user = new UserModel();
                user.Id = 1;

                string name = user.GetTableName();

                string remark = UserState.Normal.GetRemark();

                BaseDAL.Save(user);


                #region AOP show
                Console.WriteLine("***********************");
                Decorator.Show();
                Console.WriteLine("***********************");
                Proxy.Show();
                Console.WriteLine("***********************");
                CastleProxy.Show();
                Console.WriteLine("***********************");
                UnityAOP.Show();
                #endregion
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.Read();
        }
    }
}

using MyAttribute.AttributeExtend;
using System;
namespace MyAttribute
{
    /// 

    /// User:实体类(业务信息)
    /// 
    //[CustomAttribute]
    //[Custom]
    //[CustomAttribute()]
    //[Custom()]
    //[Custom(123)]
    //[CustomAttribute(123)]
    //[Custom(123,"456")]
    //[CustomAttribute(123, "456")]
    //[Custom(Remark="这里是特性")]
    //[Custom(123, Remark = "这里是特性")]
    //[CustomAttribute(123, Remark = "这里是特性")]
    //[Custom(123, "456",Remark="这里是特性")]
    //[CustomAttribute(123, "456", Remark = "这里是特性", Description = "Description")]










    [Table("User")]

    public class UserModel
    {
        //public string TableName = "User";

        [IntValidateAttribute(0, 10000)]
        //[IntValidateAttribute(2, 5000)]
        public int Id { get; set; }
        #region Model

        /// 

        /// 
        /// 
        public string Account
        {
            set;
            get;
        }
        /// 

        /// 密码
        /// 
        public string Password
        {
            set;
            get;
        }
        /// 

        /// EMaill
        /// 
        public string Email
        {
            set;
            get;
        }
        /// 

        /// 手提
        /// 
        public string Mobile
        {
            set;
            get;
        }
        /// 

        /// 企业ID
        /// 
        public int? CompanyId
        {
            set;
            get;
        }
        /// 

        /// 企业名称
        /// 
        public string CompanyName
        {
            set;
            get;
        }
        /// 

        /// 用户状态  0正常 1冻结 2删除
        /// 
        public int? State
        {
            set;
            get;
        }
        /// 

        /// 用户类型  1 普通用户 2管理员 4超级管理员
        /// 
        public int? UserType
        {
            set;
            get;
        }
        /// 

        /// 最后一次登陆时间
        /// 
        public DateTime? LastLoginTime
        {
            set;
            get;
        }

        /// 

        /// 最后一次修改人
        /// 
        public int? LastModifierId
        {
            set;
            get;
        }
        /// 

        /// 最后一次修改时间
        /// 
        public DateTime? LastModifyTime
        {
            set;
            get;
        }
        #endregion Model

    }
}

 

转载于:https://www.cnblogs.com/zhengqian/p/8615112.html