program.cs

大话设计模式源码bigtalkdesignpattern_src

using System;
using System.Collections.Generic;
using System.Text;

namespace 命令模式
{
    class Program
    {
        static void Main(string[] args)
        {
            Receiver r = new Receiver();
            Command c = new ConcreteCommand(r);
            Invoker i = new Invoker();

            // Set and execute command 
            i.SetCommand(c);
            i.ExecuteCommand();

            Console.Read();

        }
    }

    abstract class Command
    {
        protected Receiver receiver;

        public Command(Receiver receiver)
        {
            this.receiver = receiver;
        }

        abstract public void Execute();
    }

    class ConcreteCommand : Command
    {
        public ConcreteCommand(Receiver receiver)
            :
          base(receiver) { }

        public override void Execute()
        {
            receiver.Action();
        }
    }

    class Receiver
    {
        public void Action()
        {
            Console.WriteLine("执行请求！");
        }
    }

    class Invoker
    {
        private Command command;

        public void SetCommand(Command command)
        {
            this.command = command;
        }

        public void ExecuteCommand()
        {
            command.Execute();
        }
    }


}