命令模式： 允许把动作请求者和动作执行者解耦

1、这里拿遥控器和家用电器的例子来说，遥控器就是动作请求者，动作执行者就是家用电器

2、以下只是一个简答的实现可扩展性设计思路，仅供参考

1、家用电器（灯泡）

Light类对象

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

namespace DesignModel
{
    public class Light
    {
        public void On()
        {
            Console.WriteLine("开灯");
        }

        public void Off()
        {
            Console.WriteLine("关灯");
        }
    }
}

2、遥控器

RemoteControl类对象

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

namespace DesignModel
{
    class RemoteControl
    {
        public ICommond Slot { get; set; }

        /// <summary>
        /// 按钮执行
        /// </summary>
        public void ButtonWasPressed() {
            Slot.Execute();
        }
    }
}

3、开灯命令

LighOnCommond 类对象

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

namespace DesignModel
{
    public class LighOnCommond : ICommond
    {
        private readonly Light light;

        public LighOnCommond(Light _light) {
            this.light = _light;
        }

        public void Execute() {
            this.light.On();
        }
    }
}

4、关灯命令

LightOffCommond 类对象

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

namespace DesignModel
{
    public class LightOffCommond:ICommond
    {
        private readonly Light light;

        public LightOffCommond(Light _light)
        {
            this.light = _light;
        }

        public void Execute()
        {
            this.light.Off();
        }
    }
}

5、执行命令

using System;

namespace DesignModel
{
    class Program
    {
        static void Main(string[] args)
        {
            RemoteControl rc = new RemoteControl();
            Light light = new Light();
            LighOnCommond lightOn = new LighOnCommond(light);
            //1、开灯
            rc.Slot = lightOn;
            rc.ButtonWasPressed();

            //2、关灯
            LightOffCommond lightOff = new LightOffCommond(light);
            rc.Slot = lightOff;
            rc.ButtonWasPressed();
        }
    }
}

6、效果如下所示

浅谈设计模式之命令设计模式_ico

浅谈设计模式之命令设计模式_类对象_02