桥梁模式 Bridge Patter

IElectricalEquipment.cs

// Interface // Implementor 实现类接口// 电器共性，抽象处理public interface IElectricalEquipment{    void PowerOn(); // Each electrical equipment can be turned on    void PowerOff(); // Each electrical equipment can be turned off}// 接口只包含方法、属性、事件或索引器的签名。// 实现接口的类或结构必须实现接口定义中指定的接口成员。

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Fan.cs

// ConcreteImplementor 具体实现类// 电扇类public class Fan : IElectricalEquipment{  public void PowerOn()  {    Console.WriteLine("Fan is on");  }  public void PowerOff()  {    Console.WriteLine("Fan is off");  }}

Light.cs

// ConcreteImplementor 具体实现类// 电灯类public class Light : IElectricalEquipment{  public void PowerOn()  {    Console.WriteLine("Light is on");  }  public void PowerOff()  {    Console.WriteLine("Light is off");  }}

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Switch.cs

// Abstraction// Switch 基类// 电器开关public class Switch{  // Switch拥有IElectricalEquipment被封装的实例  public IElectricalEquipment equipment  {    get;    set;  }  public void On()  {    // Switch has an on button    Console.WriteLine("Switch on the equipment");    equipment.PowerOn();  }  public void Off()  {    // Switch has an off button    Console.WriteLine("Switch off the equipment");    equipment.PowerOff();  }}

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NormalSwitch.cs

// RefinedAbstraction 扩充抽象类// 普通类型的开关public class NormalSwitch : Switch{}

FancySwitch.cs

// RefinedAbstraction 扩充抽象类// 特定类型的开关public class FancySwitch : Switch{}

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Main.cs

static void Main(string[] args){  // We have some electrical equipments, say Fan, Light etc.  // So, lets create them first.  IElectricalEquipment fan = new Fan();  IElectricalEquipment light = new Light();  // We also have some switches. Lets create them too.  Switch fancySwitch = new FancySwitch();  Switch normalSwitch = new NormalSwitch();  // Lets connect the Fan to the fancy switch  fancySwitch.equipment = fan;  // As the switch now has an equipment (Fan),  // so switching on or off should  // turn on or off the electrical equipment  fancySwitch.On(); // It should turn on the Fan.  // so, inside the On() method of Switch,  // we must turn on the electrical equipment.  // It should turn off the Fan. So, inside the On() method of  fancySwitch.Off();  // Switch, we must turn off the electrical equipment  // Now, lets plug the light to the fancy switch  fancySwitch.equipment = light;  fancySwitch.On(); // It should turn on the Light now  fancySwitch.Off(); // It should be turn off the Light now  normalSwitch .equipment = light;  normalSwitch.On(); // It should turn on the Light now  normalSwitch.Off(); // It should be turn off the Light now}

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源文:我给媳妇解释设计模式：第一部分