C# Event事件的订阅与发布

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace EventSimpleDemo
 7 {
 8     class Program
 9     {
10         static void Main(string[] args)
11         {
12             Mom mom = new Mom();
13             Dad dad = new Dad();
14             Son son = new Son();
15             mom.Eat += new Action(dad.Eat);// 订阅
16             //mom.Eat += new Action(son.Eat);
17 
18             mom.Cooking();
19             Console.ReadKey();
20         }
21     }
22 
23     public class Mom
24     {
25         //public delegate void delegateAction();
26         public event Action Eat;// Action 可以改成委托方法：delegateAction
27 
28         public void Cooking()
29         {
30             Console.WriteLine("妈妈：饭好了！");
31             if (Eat != null)
32             {
33                 Eat();
34             }
35         } 
36     }
37 
38     public class Dad
39     {
40         public void Eat()
41         {
42             Console.WriteLine("爸爸：马上来！");
43         }
44     }
45 
46     public class Son
47     {
48         public void Eat()
49         {
50             Console.WriteLine("儿子：等会再吃！");
51         }
52     }
53 
54 }