1  /// <summary>
 2    /// 命令执行者
 3    /// </summary>
 4     public class Invoker
 5     {
 6         private IList<ICommand> commands = new List<ICommand>();
 7         public void AddCommand(ICommand command)
 8         {
 9             commands.Add(command);
10         }
11       
12         public void RemoveCommand(ICommand command)
13         {
14             commands.Remove(command);
15         }
16         public void Invoke()
17         {
18             foreach (ICommand cmd in commands)
19             {
20                 cmd.Excute();
21             }
22         }
23       }
24     /// <summary>
25     /// 命令接口
26     /// </summary>
27     public interface ICommand
28     {
29         void Excute();
30     }
31     /// <summary>
32     /// 命令实现类
33     /// </summary>
34     public class ConcreteCommand : ICommand
35     {
36         IReceiver receiver = null;
37         public ConcreteCommand(IReceiver receiver)
38         {
39             this.receiver = receiver;
40         }
41         public void Excute()
42         {
43             receiver.Action();
44         }
45     }
46     /// <summary>
47     /// 实际接收者接口
48     /// </summary>
49     public interface IReceiver
50     {
51         void Action();
52     }
53     /// <summary>
54     /// Tv
55     /// </summary>
56     public class TvReceiver:IReceiver
57     {
58         public void Action()
59         {
60             Console.WriteLine("Tv show");
61         }
62     }
63     /// <summary>
64     /// light
65     /// </summary>
66     public class LightReceiver : IReceiver
67     {
68         public void Action()
69         {
70             Console.WriteLine("Ligth up");
71         }
72     }
73 
74     /// <summary>
75     /// client
76     /// </summary>
77     public class Client
78     {
79         public void Test()
80         {
81             IReceiver receiver = new LightReceiver();
82             ConcreteCommand cmd = new ConcreteCommand(receiver);
83             Invoker invoker = new Invoker();
84             invoker.AddCommand(cmd);
85             cmd.Excute();
86         }
87     }