简单.net事件模型

代码

   
     

    
      
    
      using
    
       System;

    
      using
    
       System.Collections.Generic;

    
      using
    
       System.Linq;

    
      using
    
       System.Text;

    
      using
    
       System.ComponentModel;


    
      namespace
    
       ConsoleApplication1
{
 
    
      public
    
       
    
      class
    
       Program
 {
 
    
      static
    
       
    
      void
    
       Main(
    
      string
    
      [] args)
 {
 publisher p 
    
      =
    
       
    
      new
    
       publisher(
    
      "
    
      P
    
      "
    
      );
 Receive r 
    
      =
    
       
    
      new
    
       Receive();
 p.Sayhello 
    
      +=
    
       
    
      new
    
       publisher.SayhelloEventHandler(r.tip);
 p.OnSayhello(
    
      "
    
      OK
    
      "
    
      );
 }


 }
 
    
      public
    
       
    
      class
    
       Receive
 {
 
    
      public
    
       
    
      void
    
       tip(String s)
 {
 Console.WriteLine(
    
      "
    
      Reciver Heard: 
    
      "
    
       
    
      +
    
       s);
 }
 }

 
    
      public
    
       
    
      class
    
       publisher
 {
 
    
      public
    
       String Name { 
    
      get
    
      ; 
    
      set
    
      ; }
 
    
      public
    
       publisher() { }
 
    
      public
    
       publisher(String name) { 
    
      this
    
      .Name 
    
      =
    
       name; }
 
    
      public
    
       
    
      delegate
    
       
    
      void
    
       SayhelloEventHandler(String s);
 
    
      public
    
       
    
      event
    
       SayhelloEventHandler Sayhello;

 
    
      public
    
       
    
      void
    
       OnSayhello(String s)
 {
 
    
      if
    
       (
    
      this
    
      .Sayhello 
    
      !=
    
       
    
      null
    
      )
 {
 Console.WriteLine(
    
      "
    
      PUBLISH Say 
    
      "
    
       
    
      +
    
       s);
 Sayhello(s);
 }

 }
 }

}