路由事件学习

事件与委托的学习：http://www.cnblogs.com/jimmyzhang/archive/2007/09/23/903360.html（很具体）

看过WPF葵花宝典一书，对小龙女在谷底被找到的叙述记忆犹新，今天想由此重现路由事件，也算自己再温习一遍了。

事件由来：

1. 小龙女在谷底求救，将自己的信息写在蜜蜂的翅膀上。

2. 老顽童抓到蜜蜂，看到了翅膀上的字。

3. 黄蓉抓到蜜蜂，看到了翅膀上的字。

4. 杨过看到翅膀上的字。

整理为路由事件，则是：小龙女写字-->蜜蜂带信-->老顽童，黄蓉，杨过看到字 

代码如下： 

using System;
namespace ConsoleApplication1
{
    class Program
    {
        delegate void beeFly(string message);
        static event beeFly beeServer;

       public  static void Main(string[] args)
        {
           string message= xiaolongnv();
           
            beeServer += laowantong;
            beeServer +=new beeFly(huangrong);
            beeServer +=yangguo;
            beeServer(message);           
            Console.Read();
        }


        static string  xiaolongnv()
        {
            string message = "xiaolongnv：I'm xiaolongnv,I'm at the butom of a valley.who can help me?";
            return message;
        }

        private static void laowantong(string message)
        {
            Console.WriteLine("laowantong：haha,I have caught the bee?\n"
                                         + "……\n"
                                         + "where is xiaolongnv");
        }
        private static void huangrong(string message)
        {
            Console.WriteLine("huangrong：haha,I have caught the bee?\n"
                                        + "……\n"
                                        + "Is she in a place where has many flower?");
        }
        private static void yangguo(string message)
        {
            Console.WriteLine("yangguo：haha,I have caught the bee?\n"
                                        + "……\n"
                                        + "xiaolongnv ,where are you?I miss you");
        }
    }
}

一个简单的事件就写好了。

 .Net Framework的编码规范：

• 委托类型的名称都应该以EventHandler结束。
• 委托的原型定义：有一个void返回值，并接受两个输入参数：一个Object 类型，一个 EventArgs类型(或继承自EventArgs)。
• 事件的命名为 委托去掉 EventHandler之后剩余的部分。
• 继承自EventArgs的类型应该以EventArgs结尾。

换一种写法：

using System;
namespace ConsoleApplication1
{
    class Program
    {
        delegate void SendMessageHander(object obj,MessageEventArgs e);
        static event MessageHander SendMessage;

       public  static void Main(string[] args)
        {
           SendMessage +=new SendMessageHander(laoWanTongEventHandle.laowantong); //注册
           SendMessage += new SendMessageHander(huangrongEventHandle.huangrong);//注册
           SendMessage += new SendMessageHander(yangguoEventHandle.yangguo);//注册
           XiaoLongNv longer = new XiaoLongNv();
           longer.kezi();//事件开始发起
            Console.Read();
        }

       class XiaoLongNv
       {
           public readonly string Name;
           public readonly DateTime birthDate;
           public void kezi()
           {
               MessageEventArgs e = new MessageEventArgs();
               SendMessage(this, e);
           }
          
       }
        class MessageEventArgs:EventArgs
        {
            public readonly string Message = "xiaolongnv：I'm xiaolongnv,I'm at the butom of a valley.who can help me?";

            private DateTime  _messageTime;

            public DateTime  MessageTime
            {
                get { return _messageTime; }
                set { _messageTime = value; }
            }
            
        }

        class laoWanTongEventHandle
        {
            public static void laowantong(object obj, MessageEventArgs e)
            {
                Console.WriteLine(e.Message+"\nlaowantong：haha,I have caught the bee?\n"
                                             + "……\n"
                                             + "where is xiaolongnv");
            }
        }
        class huangrongEventHandle
        {
            public static void huangrong(object obj, MessageEventArgs e)
            {
                Console.WriteLine(e.Message +"\nhuangrong：haha,I have caught the bee?\n"
                                            + "……\n"
                                            + "Is she in a place where has many flower?");
            }
        }
        class yangguoEventHandle
        {
            public static void yangguo(object obj, MessageEventArgs e)
            {
                Console.WriteLine(e.Message + "\nyangguo：haha,I have caught the bee?\n"
                                            + "……\n"
                                            + "xiaolongnv ,where are you?I miss you");
            }
        }
    }
}