外观模式（Facade）

  1 /*
  2  * 一个保安系统的，由录像机、电灯、红外线监控和警报器组成。保安系统的操作
  3  * 人员需要经常将这些仪器启动和关闭。保安类需要用到所有的录像机(Camera)、
  4  * 电灯(Light)、感应器(Sensor)和警报器(Alarm)对象，保安觉得使用不方便。应
  5  * 用外观模式，用C#控制台应用程序改进该设计。
  6  */
  7 using System;
  8 using System.Collections.Generic;
  9 using System.Linq;
 10 using System.Text;
 11 
 12 namespace Facade
 13 {
 14     //照相机类
 15     class Camera
 16     {
 17         public void Start()
 18         {
 19             Console.WriteLine("启动录像机。");
 20         }
 21         public void Close()
 22         {
 23             Console.WriteLine("关闭录像机。");
 24         }
 25     }
 26     //灯光类
 27     class Light
 28     {
 29         public void Start()
 30         {
 31             Console.WriteLine("启动灯光。");
 32         }
 33         public void Close()
 34         {
 35             Console.WriteLine("关闭灯光。");
 36         }
 37     }
 38     //感应器类
 39     class Sensor
 40     {
 41         public void Start()
 42         {
 43             Console.WriteLine("启动感应器。");
 44         }
 45         public void Close()
 46         {
 47             Console.WriteLine("关闭感应器。");
 48         }
 49     }
 50     //警报器类
 51     class Alarm
 52     {
 53         public void Start()
 54         {
 55             Console.WriteLine("启动警报器。");
 56         }
 57         public void Close()
 58         {
 59             Console.WriteLine("关闭警报器。");
 60         }
 61     }
 62     //遥控器类
 63     class RemoteControl
 64     {
 65         private Alarm alarm;
 66         private Sensor sensor;
 67         private Light light;
 68         private Camera camera;
 69 
 70         public RemoteControl()
 71         {
 72             alarm = new Alarm();
 73             sensor = new Sensor();
 74             light = new Light();
 75             camera = new Camera();
 76         }
 77         public void StartCamera()
 78         {
 79             camera.Start();
 80         }
 81         public void CloseCamera()
 82         {
 83             camera.Close();
 84         }
 85         public void StartLight()
 86         {
 87             light.Start();
 88         }
 89         public void CloseLight()
 90         {
 91             light.Close();
 92         }
 93         public void StartSensor()
 94         {
 95             sensor.Start();
 96         }
 97         public void CloseSensor()
 98         {
 99             sensor.Close();
100         }
101         public void StartAlarm()
102         {
103             alarm.Start();
104         }
105         public void CloseAlarm()
106         {
107             alarm.Close();
108         }
109     }
110     //保安类
111     class Security
112     {
113         private string name;
114         private RemoteControl rc;
115         public Security(string name,RemoteControl rc)
116         {
117             this.name = name;
118             this.rc = rc;
119             Console.WriteLine("{0}值班中。他手里拿了一个遥控器。\n", name);
120         }
121         public RemoteControl Control()
122         {
123             return this.rc;
124         }
125     }
126     class Program
127     {
128         static void Main(string[] args)
129         {
130             Security baoan = new Security("包鞍",new RemoteControl());
131 
132             baoan.Control().StartAlarm();
133             baoan.Control().StartCamera();
134             baoan.Control().StartLight();
135             baoan.Control().StartSensor();
136 
137             Console.WriteLine("");
138             baoan.Control().CloseAlarm();
139             baoan.Control().CloseCamera();
140             baoan.Control().CloseLight();
141             baoan.Control().CloseSensor();
142         }
143     }
144 }