浅谈委托和事件之委托链

 

一、委托链的概念                                                                               

将多个方法捆绑到同一个委托对象上，形成委托链，当调用这个委托对象时，将依次调用委托链中的方法。如下代码:

MSDN上也把这种方式翻译为合并委托或者是多路广播委托，参看： http://msdn.microsoft.com/zh-cn/library/ms173175.aspx

 

二、代码解释：                                                                                  

1、在Publisher声明一个委托PublishBook

2、在Program中实现两个方法ReadCSharpBook和ReadJavaBook

3、在Main函数中实例化委托利用运算符“+=”形成委托链。

4、调用委托链pck()。

 

   1: /*

   2:  * Date: 2011-07-07

   3:  * Time: 11:29

   4:  * Create by xiangyun

   5:  */

   6: using System;

   7:  

   8: namespace LearnDelegate

   9: {

  10:     public class Publisher

  11:     {

  12:         public delegate void  PublishBook();

  13:     }

  14:  

  15:     class Program

  16:     {

  17:         public static void ReadCSharpBook()

  18:         {

  19:             Console.WriteLine("Im Reading C Sharp Book Now!!");

  20:         }

  21:         public static void ReadJavaBook()

  22:         {

  23:             Console.WriteLine("Im Reading Java Book Now!!");

  24:         }

  25:         public static void Main(string[] args)

  26:         {

  27:             Publisher.PublishBook pck = new Publisher.PublishBook(Program.ReadCSharpBook);

  28:             pck+= new Publisher.PublishBook(Program.ReadJavaBook);

  29:             pck();

  30:             Console.Write("Press any key to continue . . . ");

  31:             Console.ReadKey(true);

  32:         }

  33:     }

  34: }

三、推荐文章：                                                                                 

http://www.cnblogs.com/wangiqngpei557/archive/2011/04/29/2032762.html

转载于:https://www.cnblogs.com/xiangyun/archive/2011/07/07/2099968.html