策略模式

1 //抽象算法类
2     abstract class strategy
3     { 
4        //算法方法
5         public abstract void AlgorithmInterface();
6     }

 1 //具体算法A
 2     class ConcreteStrategyA : strategy
 3     { 
 4         //算法A实现方法
 5         public override void AlgorithmInterface()
 6         {
 7             Console.WriteLine("我是算法A的实现方法！");
 8         }
 9     }
10     //具体算法B
11     class ConcreteStrategyB : strategy
12     { 
13         //算法B实现方法
14         public override void AlgorithmInterface()
15         {
16             Console.WriteLine("我是算法B的实现方法！");
17         }
18     }
19     //具体算法C
20     class ConcreteStrategyC : strategy
21     { 
22         //算法C实现方法
23         public override void AlgorithmInterface()
24         {
25             Console.WriteLine("我是算未能C的实现方法！");
26         }
27     }

 1 class Context 
 2     {
 3         private strategy strate;
 4         public Context(strategy strate) 
 5         {
 6             this.strate = strate;
 7         }
 8         public void ContextInterface() 
 9         {
10             strate.AlgorithmInterface();
11         }
12     }

1 class Program
2     {
3         static void Main(string[] args)
4         {
5             //获取上下文类
6             Context context = new Context(new ConcreteStrategyA());
7             context.ContextInterface();
8         }
9     }