C#面向对象设计模式纵横谈——23 Strategy策略模式

主讲：李建忠

来源：http://www.microsoft.com/china/msdn/events/webcasts/shared/webcast/consyscourse/CsharpOOD.aspx

 

 

   1:  enum CartType

   2:  {

   3:      A,

   4:      B,

   5:      C

   6:  }

   7:   

   8:  public interface IProcessStrategy    //表达算法抽象

   9:  {

  10:      void Process();

  11:  }

  12:   

  13:  public ProcessStrategyA: IProcessStrategy 

  14:  {

  15:      public void Process()

  16:      {

  17:          //...

  18:      }

  19:  }

  20:   

  21:  public ProcessStrategyB: IProcessStrategy 

  22:  {

  23:      public void Process()

  24:      {

  25:          //...

  26:      }

  27:  }

  28:   

  29:  public ProcessStrategyC: IProcessStrategy 

  30:  {

  31:      public void Process()

  32:      {

  33:          //...

  34:      }    

  35:  }

  36:   

  37:  class Cart

  38:  {

  39:      IProcessStrategy processStrategy;

  40:   

  41:      public Cart(IProcessStrategy processStrategy)

  42:      {

  43:          this.processStrategy=processStrategy;

  44:      }

  45:   

  46:      public void Somemethod()

  47:      {

  48:          //...

  49:          processStrategy.Process();

  50:      }

  51:  }

  52:   

  53:  class App

  54:  {

  55:      public static void Main()

  56:      {

  57:          Cart cart=new Cart(new ProcessStrategyC());

  58:      }

  59:  }