Command Pattern（命名模式）C#源代码

最新推荐文章于 2025-08-12 14:27:48 发布
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本文通过实现一个遥控器的例子展示了命令设计模式的应用。遥控器上有多个按钮，每个按钮对应一个命令，可以控制不同的家用电器执行打开或关闭操作。文章详细介绍了各个类的设计与实现过程。
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Command
{
    class CRunMain
    {
        static void Main(string[] args)
        {
            int i = 0;
            //ctrl command
            CRemote objRemote= new CRemote(6);
            //work object
            CLight objLightLivingRoom = new CLight("Living Room");
            CLight objLightKitch = new CLight("Kitch");
            CStereo objStereoLivingRoom = new CStereo("Living Room");
            CCeilingFan objCeilingFan = new CCeilingFan("Living Room");
            CGarageDoor objGrageDoor = new CGarageDoor("Garage");
            CHottub objHottu = new CHottub();
            //commad object
            CLightOnCmd objLightLivingRoomOn = new CLightOnCmd(objLightLivingRoom);
            CLightOnCmd objLightLivingRoomOff = new CLightOnCmd(objLightLivingRoom);
            CLightOnCmd objLightKitchOn = new CLightOnCmd(objLightKitch);
            CLightOnCmd objLightKitchOff = new CLightOnCmd(objLightKitch);
            CGarageDoorUpCmd objGarageDoorUp = new CGarageDoorUpCmd(objGrageDoor);
            CGarageDoorDownCmd objGarageDorrDown = new CGarageDoorDownCmd(objGrageDoor);
            CCmdStereoOnWithCD objStereoOnWithCD = new CCmdStereoOnWithCD(objStereoLivingRoom);
            CCmdStereoOffWithCD objStereoOffWithCD = new CCmdStereoOffWithCD(objStereoLivingRoom);
            CCeilingFanOnCmd objCeilingFangOn = new CCeilingFanOnCmd(objCeilingFan);
            CCeilingFanOffCmd objCeilingFangOff = new CCeilingFanOffCmd(objCeilingFan);
            CHottubOnCmd objHottubOn = new CHottubOnCmd(objHottu);
            CHottubOffCmd objHottubOff = new CHottubOffCmd(objHottu);
            //set command object
            objRemote.SetCmd(0, objLightLivingRoomOn, objLightLivingRoomOff);
            objRemote.SetCmd(1, objLightKitchOn, objLightKitchOff);
            objRemote.SetCmd(2, objGarageDoorUp, objGarageDorrDown);
            objRemote.SetCmd(3, objStereoOnWithCD, objStereoOffWithCD);
            objRemote.SetCmd(4, objCeilingFangOn, objCeilingFangOff);
            objRemote.SetCmd(5, objHottubOn, objHottubOff);           
            //execute event
            for (i = 0; i < 6; i++)
            {
                Console.WriteLine(objRemote.BtnOnWasPushed(i));
                Console.WriteLine(objRemote.BtnOffWasPushed(i));
            }
        }
    };
    public class CStereo
    {
        public CStereo(string strLocation)
        {
            this.m_strLocation = strLocation;
        }
        public string On()
        {
            return this.m_strLocation + "stereo is on";
        }
        public string Off()
        {
            return this.m_strLocation + "stereo if off";
        }
        public string SetCD()
        {
            return this.m_strLocation + "stereo is set for CD input";
        }
        public string SetDVD()
        {
            return this.m_strLocation + "stereo is set for DVD input";
        }
        public string SetRadio()
        {
            return this.m_strLocation + "stereo is set for Radio";
        }
        public string SetVolume(int nVolume)
        {
            return this.m_strLocation + "stereo volume set to " + nVolume;
        }
        protected string m_strLocation;
    };
    public interface ICommand
    {
        object Execute();
    };
    public class CCmdStereoOnWithCD : ICommand
    {
        public CCmdStereoOnWithCD(CStereo objStereo)
        {
            this.m_objStereo = objStereo;
        }
        public object Execute()
        {
            return this.m_objStereo.On() + "/n" + this.m_objStereo.SetCD() + "/n"
                + this.m_objStereo.SetVolume(11);
        }
        private CStereo m_objStereo;
    };
    public class CCmdStereoOffWithCD : ICommand
    {
        public CCmdStereoOffWithCD(CStereo objStereo)
        {
            this.m_objStereo = objStereo;
        }
        public object Execute()
        {
            return this.m_objStereo.Off();
        }
        private CStereo m_objStereo;
    }
    public class CLight
    {
        public CLight(string strLocation)
        {
            this.m_strLocation = strLocation;
        }
        public string On()
        {
            return this.m_strLocation + " light is on";
        }
        public string Off()
        {
            return this.m_strLocation + " light is off";
        }
        private string m_strLocation;
    };
    public class CNoCmd : ICommand
    {
        public CNoCmd()
        {
        }
        public object Execute()
        {
            return null;
        }
    };
    public class CRemote
    {
        public CRemote(int nCmd)
        {
            int i = 0;
            CNoCmd objNoCmd = new CNoCmd();
            this.m_arrCmdOff = new ICommand[nCmd];
            this.m_arrCmdOn = new ICommand[nCmd];
            for (i = 0; i < nCmd; i++)
            {
                this.m_arrCmdOn[i] = objNoCmd;
                this.m_arrCmdOff[i] = objNoCmd;
            }
        }
        public void SetCmd(int nIndex, ICommand objCmdOn, ICommand objCmdOff)
        {
            if ((nIndex >= m_arrCmdOn.Length) || (nIndex < 0))
            {
                return;
            }
            this.m_arrCmdOn[nIndex] = objCmdOn;
            this.m_arrCmdOff[nIndex] = objCmdOff;
        }
        public object BtnOnWasPushed(int nIndex)
        {
            if (nIndex >= this.m_arrCmdOn.Length)
            {
                return null;
            }
            return this.m_arrCmdOn[nIndex].Execute();
        }
        public object BtnOffWasPushed(int nIndex)
        {
            if (nIndex >= this.m_arrCmdOff.Length)
            {
                return null;
            }
            return this.m_arrCmdOff[nIndex].Execute();
        }
        public override  string ToString()
        {
            int i = 0;
            StringBuilder strbd = new StringBuilder();
            strbd.Append("/n----------- Remote Control --------------/n");
           
            for (i = 0; i < this.m_arrCmdOn.Length; i++)
            {
                strbd.Append("[slot" + i + "]" + this.m_arrCmdOn.GetType().Name 
                    + "/t" + this.m_arrCmdOff[i].GetType().Name + "/n");
            }
            return strbd.ToString();
        }
        private ICommand[] m_arrCmdOn;
        private ICommand[] m_arrCmdOff;
    };
    public class CLightOnCmd : ICommand
    {
        public CLightOnCmd(CLight objLight)
        {
            this.m_objLight = objLight;
        }
        public object Execute()
        {
            return this.m_objLight.On();
        }
        private CLight m_objLight;
    };
    public class CLightOffCmd : ICommand
    {
        public CLightOffCmd(CLight objLight)
        {
            this.m_objLight = objLight;
        }
        public object Execute()
        {
            return this.m_objLight.Off();
        }
        private CLight m_objLight;
    };
    public class CHottub
    {
        public CHottub()
        {
        }
        public bool On()
        {
            this.m_bOn = true;
            return this.m_bOn;
        }
        public bool Off()
        {
            this.m_bOn = false;
            return this.m_bOn;
        }
        public string BubblesOn()
        {
            if (this.m_bOn)
            {
                return "Hottub is bubbling!";
            }
            return null;
        }
        public string BubblesOff()
        {
            if (this.m_bOn)
            {
                return "Hottub is not bubbling!";
            }
            return null;
        }
        public string JetsOn()
        {
            if (this.m_bOn)
            {
                return "Hottub jets are on!";
            }
            return null;
        }
        public string JetsOff()
        {
            if (this.m_bOn)
            {
                return "Hottub jets are not on!";
            }
            return null;
        }
        public int SetTemperature(int nTemperature)
        {
            this.m_nTemperature = nTemperature;
            return this.m_nTemperature;
        }
        public string Heat()
        {
            this.m_nTemperature = 105;
            return "Hottub is heating to a steaming 105 degrees";
        }
        public string Cool()
        {
            this.m_nTemperature = 98;
            return "Hottub is cooling to 98 degrees";
        }
        private bool m_bOn;
        private int m_nTemperature;
    };
    public class CHottubOnCmd : ICommand
    {
        public CHottubOnCmd(CHottub objHottub)
        {
            this.m_objHottub = objHottub;
        }
        public object Execute()
        {
            return this.m_objHottub.On() + "/n" + this.m_objHottub.Heat() + "/n" + this.m_objHottub.BubblesOn();
        }
        private CHottub m_objHottub;
    }
    
    public class CHottubOffCmd : ICommand
    {
        public CHottubOffCmd(CHottub objHottub)
        {
            this.m_objHottub = objHottub;
        }
        public object Execute()
        {
            return this.m_objHottub.Off();
        }
        private CHottub m_objHottub;
    }
    public class CGarageDoor
    {
        public CGarageDoor(string strLocation)
        {
            this.m_strLocation = strLocation;
        }
        public string Up()
        {
            return "Garage door is up";
        }
        public string Down()
        {
            return "Garage door is down";
        }
        public string Stop()
        {
            return "Garage door movement is stopped";
        }
        public string LightOn()
        {
            return "Garage door light is on";
        }
        public string LightOff()
        {
            return "Garage door light is off";
        }
        private string m_strLocation;
    };
    public class CGarageDoorUpCmd : ICommand
    {
        public CGarageDoorUpCmd(CGarageDoor objGarageDoor)
        {
            this.m_objGarageDoor = objGarageDoor;
        }
        public object Execute()
        {
            return this.m_objGarageDoor.Up();
        }
        private CGarageDoor m_objGarageDoor;
    };
    public class CGarageDoorDownCmd : ICommand
    {
        public CGarageDoorDownCmd(CGarageDoor objGarageDoor)
        {
            this.m_objGarageDoor = objGarageDoor;
        }
        public object Execute()
        {
            return this.m_objGarageDoor.Down();
        }
        private CGarageDoor m_objGarageDoor;
    };
    public class CCeilingFan
    {
        public CCeilingFan(string strLocation)
        {
            this.m_strLoation = strLocation;
            this.m_nLevel = 0;
        }
        public string High()
        {
            this.m_nLevel = HIGH;
            return this.m_strLoation + " ceiling fan is on high";
        }
        public string Medium()
        {
            this.m_nLevel = MEDIUM;
            return this.m_strLoation + " ceiling fan is on medium";
        }
        public string Low()
        {
            this.m_nLevel = LOW;
            return this.m_strLoation + " ceiling fan is on low";
        }
        public string Off()
        {
            this.m_nLevel = 0;
            return this.m_strLoation + " ceiling fan is off";
        }
        public int GetSpeed()
        {
            return this.m_nLevel;
        }
        private string m_strLoation;
        private int m_nLevel;
        public const int HIGH = 2;
        public const int MEDIUM = 1;
        public const int LOW = 0;
    };
    public class CCeilingFanOnCmd : ICommand
    {
        public CCeilingFanOnCmd(CCeilingFan objCeilingFan)
        {
            this.m_objCeilingFan = objCeilingFan;
        }
        public object Execute()
        {
            return this.m_objCeilingFan.High();
        }
        private CCeilingFan m_objCeilingFan;
    }
    public class CCeilingFanOffCmd : ICommand
    {
        public CCeilingFanOffCmd(CCeilingFan objCeilingFan)
        {
            this.m_objCeilingFan = objCeilingFan;
        }
        public object Execute()
        {
            return this.m_objCeilingFan.Off();
        }
        private CCeilingFan m_objCeilingFan;
    }
};