C# 事件委托案例

  

   

    

     

    
    

     

      using System;
     
    
   

    

     

    
    

     

      using System.Collections.Generic;
     
    
   

    

     

    
    

     

      using System.Linq;
     
    
   

    

     

    
    

     

      using System.Text;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      namespace TDelegate
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public delegate void MyHandler1(object sender, MyEventArgs e);
     
    
   

    

     

    
    

     
 public delegate void MyHandler2(object sender, MyEventArgs e);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public class Program
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public static void Main()
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       B b = new B();
     
    
   

    

     

    
    

     

       A a = new A(b);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       MyEventArgs e1 = new MyEventArgs();
     
    
   

    

     

    
    

     

       MyEventArgs e2 = new MyEventArgs();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       e1.m_id = "Event args for event 1";
     
    
   

    

     

    
    

     

       e2.m_id = "Event args for event 2";
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       b.FireEvent1(e1);
     
    
   

    

     

    
    

     

       b.FireEvent2(e2);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       Console.ReadKey();
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 class A
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public A(B b)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       b.Event1 += new MyHandler1(OnHandler1);
     
    
   

    

     

    
    

     

       b.Event2 += new MyHandler2(OnHandler2);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public const string m_id = "Class A";
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public void OnHandler1(object sender, MyEventArgs e)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       Console.WriteLine("I am in OnHandler1 and MyEventArgs is {0}", e.m_id);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public void OnHandler2(object sender, MyEventArgs e)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       Console.WriteLine("I am in OnHandler2 and MyEventArgs is {0}", e.m_id);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 class B
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public event MyHandler1 Event1;
     
    
   

    

     

    
    

     
 public event MyHandler2 Event2;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public void FireEvent1(MyEventArgs e)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 if (Event1 != null)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       Event1(this, e);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public void FireEvent2(MyEventArgs e)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 if (Event2 != null)
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     

       Event2(this, e);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 public class MyEventArgs
     
    
   

    

     

    
    

     

       {
     
    
   

    

     

    
    

     
 public string m_id;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
  
 

文章来源: bugstack.blog.csdn.net，作者：Yao__Shun__Yu，版权归原作者所有，如需转载，请联系作者。

原文链接：bugstack.blog.csdn.net/article/details/17416985