Strategy 模式

AbstractPunish.cs;//抽象策略类

Context.cs;//管理类

LaJiaoShui.cs;//具体策略类

LaoHuDeng.cs;//具体策略类

XiaZhuQian.cs;//具体策略类

Program.cs.//客户端类

//AbstractPunish.cs;

namespace StrategyPunish
{
    abstract class Punish
    {
        public abstract void PunishMethod();
    }

}

//Context.cs;

namespace StrategyPunish
{
    //策略Context
    class PunishContext
    {
        //声明一个父类对象
        private Punish punish = null;

        //设置策略行为，参数为具体的
        //public PunishContext(Punish punish)
        //{
        //    this.punish = punish;
        //}
        public PunishContext(string type)
        {
            switch (type)
            {
            case "ljs":
                punish = new LaJiaoShui();
                break;
            case "lhd":
                punish = new LaoHuDeng();
                break;
            case "xzq":
                punish = new XiaZhuQian();
                break;
            }
        }

        //得到结果（利用了多态机制，不同的策略行为导致不同的结果）
        public void GetResult()
        {
            if (punish != null)
            {
                punish.PunishMethod();
            }
            else
            {
                Console.WriteLine("输入非法");
            }

}
}
}

//LaJiaoShui.cs;

namespace StrategyPunish
{
    //正常，继承Punish
    class LaJiaoShui : Punish
    {
        public override void PunishMethod()
        {
            Console.WriteLine("LaJiaoShui!");
        }
    }

}

//LaoHuDeng.cs;

namespace StrategyPunish
{
    //正常，继承Punish
    class LaoHuDeng : Punish
    {
        public override void PunishMethod()
        {
            Console.WriteLine("LaoHuDeng!");
        }
    }

}

//XiaZhuQian.cs;

namespace StrategyPunish
{
    //正常，继承Punish
    class XiaZhuQian : Punish
    {
        public override void PunishMethod()
        {
            Console.WriteLine("XiaZhuQian!");
        }
    }

}

//Program.cs.

namespace StrategyPunish
{
    class Program
    {
        static void Main(string[] args)
        {
            //PunishContext pc;
            //pc = new PunishContext(new LaJiaoShui());
            //pc.GetResult();

//pc = new PunishContext(new LaoHuDeng());
//pc.GetResult();

            //pc = new PunishContext(new XiaZhuQian());
            //pc.GetResult();
            while (true)
            {
                string strAha = Console.ReadLine();
                PunishContext pc;
                pc = new PunishContext(strAha);
                pc.GetResult();
            }

}
}
}