天天向上

   1: public class Light

   2: {

   3:     //Action: On/Off

   4:     public void On()

   5:     {

   6:         Console.WriteLine("Turn on the light.");

   7:     }

   8:     public void Off()

   9:     {

  10:         Console.WriteLine("Turn off the light.");

  11:     }

  12:     public void Up()

  13:     {

  14:         Console.WriteLine("Open the door");

  15:     }

  16:     public void Down()

  17:     {

  18:         Console.WriteLine("Close the door");

  19:     }

  20: }

   1: namespace CommandPattern

   2: {

   3:     interface ICommand

   4:     {

   5:         void Execute();

   6:         void Unexecute();

   7:     }

   8: }

   1:  

   2: class LightOnCommand : ICommand

   3: {

   4:     Light light;

   5:     public LightOnCommand(Light _light)

   6:     {

   7:         this.light = _light;

   8:     }

   9:     public void Execute()

  10:     {

  11:         this.light.On();

  12:     }

  13:  

  14:     public void Unexecute()

  15:     {

  16:         this.light.Off();

  17:     }

  18: }

  19:  

   1: class LightOffCommand : ICommand

   2: {

   3:     Light light;

   4:     public LightOffCommand(Light _light)

   5:     {

   6:         this.light = _light;

   7:     }

   8:     public void Execute()

   9:     {

  10:         this.light.Off();

  11:     }

  12:  

  13:     public void Unexecute()

  14:     {

  15:         this.light.On();

  16:     }

  17: }

   1: class LightUpCommand : ICommand

   2: {

   3:     Light light;

   4:     public LightUpCommand(Light _light)

   5:     {

   6:         this.light = _light;

   7:     }

   8:     public void Execute()

   9:     {

  10:         this.light.Up();

  11:     }

  12:  

  13:     public void Unexecute()

  14:     {

  15:         this.light.Down();

  16:     }

  17: }

   1: class LightDownCommand : ICommand

   2: {

   3:     Light light;

   4:     public LightDownCommand(Light _light)

   5:     {

   6:         this.light = _light;

   7:     }

   8:     public void Execute()

   9:     {

  10:         this.light.Down();

  11:     }

  12:  

  13:     public void Unexecute()

  14:     {

  15:         this.light.Up();

  16:     }

  17: }

   1: class Invoker

   2: {

   3:     IList<ICommand> commands = new List<ICommand>();

   4:     public Invoker(ICommand cmd)

   5:     {

   6:         this.commands.Add(cmd);

   7:     }

   8:     public void setCommand(ICommand cmd)

   9:     {

  10:         this.commands.Add(cmd);

  11:     }

  12:     public void Execute()

  13:     {

  14:         foreach(ICommand cmd in commands)

  15:         {

  16:             cmd.Execute();

  17:         }

  18:     }

  19: }

   1: class Program

   2: {

   3:    static void Main(string[] args)

   4:    {

   5:        Light light = new Light();

   6:        ICommand onCmd = new LightOnCommand(light);

   7:        ICommand offCmd = new LightOffCommand(light);

   8:        ICommand upCmd = new LightUpCommand(light);

   9:        ICommand downCmd = new LightDownCommand(light);

  10:        Invoker invoker = new Invoker(onCmd);

  11:        invoker.setCommand(upCmd);

  12:        invoker.setCommand(downCmd);

  13:        invoker.setCommand(upCmd);

  14:        invoker.setCommand(upCmd);

  15:        invoker.setCommand(offCmd);

  16:        invoker.Execute();

  17:        Console.ReadKey();

  18:    }

  19: }