C# - 委托

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace 委托
 8 {
 9     static class Program
10     {
11         //定义委托
12         delegate void AnimalPlay(string name);
13 
14         static void DogPlay(string name)
15         {
16             Console.WriteLine("Name:" + name);
17             Console.WriteLine("汪汪~~~");
18         }
19 
20         static void CatPlay(string name)
21         {
22             Console.WriteLine("Name:" + name);
23             Console.WriteLine("喵喵~~~");
24         }
25 
26         static void LionPlay(string name)
27         {
28             Console.WriteLine(" Name:" + name);
29             Console.WriteLine("呜啊~~~");
30         }
31 
32         /// <summary>
33         /// 使用委托
34         /// </summary>
35         /// <param name="animalPlay">传递的是一个方法</param>
36         /// <param name="name">传递的是要用的名字</param>
37         static void RunCircus(AnimalPlay animalPlay, string name)
38         {
39             animalPlay(name);
40         }
41 
42         static void Main(string[] args)
43         {
44             //声明委托实例
45             AnimalPlay a1 = new AnimalPlay(DogPlay);
46             AnimalPlay a2 = new AnimalPlay(CatPlay);
47             AnimalPlay a3 = new AnimalPlay(LionPlay);
48 
49             //狗
50             Program.RunCircus(a1, "aaa");
51 
52             //猫
53             Program.RunCircus(a2, "bbb");
54 
55             //狮子
56             Program.RunCircus(a3, "ccc");
57 
58 //*******************************************************//
59 
60             //在新版本的.NET中可以不声明委托实例
61             //狗
62             Program.RunCircus(a1, "aaa");
63 
64             //猫
65             Program.RunCircus(a2, "bbb");
66 
67             //狮子
68             Program.RunCircus(a3, "ccc");
69 
70             Console.ReadKey();
71         }
72     }
73 }