Gof定義

將一個請求封裝為一個對象，從而使你可用不同的請求對客戶進行參數化；對請求排隊或記錄請求日志，以及支持可撤銷的操作。

理解

對命令模式我有一些膚淺的認識，也許是不對的。但我還是寫一下。其實在我理解的命令模式很簡單的。比如，A想去超市買菜，B想去超市買蘋果，C想去超市買魚。那么這時候要是有一個接收命令的人，那該多好哇。這個人接收A的命令，接收B的命令，接收C的命令，等所有人的命令都接收完后，他就開始去DO。當然如果A發過命令后，突然覺的還是 自己去買好了不買好了，那又有相應的CANCEL命令。?

CODE

class Program{static void Main(string[] args){Command cmd1 = new BakeChickenWingCommand();Command cmd2 = new BakeMuttonCommand();Waiter waiter = new Waiter();waiter.SetOrder(cmd1);waiter.SetOrder(cmd2);waiter.Notify();Console.WriteLine("-----------------------------------------");waiter.CancelOrder(cmd1);waiter.Notify();Console.ReadLine();}}class Waiter{private IList<Command> orders = new List<Command>();//設置訂單public void SetOrder(Command command){orders.Add(command);Console.WriteLine("增加訂單：" + command.ToString() + " 時間：" + DateTime.Now.ToString());}//取消訂單public void CancelOrder(Command command){orders.Remove(command);Console.WriteLine("取消訂單：" + command.ToString() + " 時間：" + DateTime.Now.ToString());}//通知全部執行public void Notify(){foreach (Command cmd in orders){cmd.ExcuteCommand();}}}//抽象命令abstract class Command{abstract public void ExcuteCommand(); }//烤羊肉串命令class BakeMuttonCommand : Command{public override void ExcuteCommand(){Console.WriteLine("烤羊肉串");} }//烤雞翅命令class BakeChickenWingCommand : Command{public override void ExcuteCommand(){Console.WriteLine("烤雞翅命令");}}

?

大話設計模式里的CODE

View Code using System; using System.Collections.Generic; using System.Text;namespace 命令模式 {class Program{static void Main(string[] args){//開店前的準備Barbecuer boy = new Barbecuer();Command bakeMuttonCommand1 = new BakeMuttonCommand(boy);Command bakeMuttonCommand2 = new BakeMuttonCommand(boy);Command bakeChickenWingCommand1 = new BakeChickenWingCommand(boy);Waiter girl = new Waiter();//開門營業 girl.SetOrder(bakeMuttonCommand1);girl.Notify();girl.SetOrder(bakeMuttonCommand2);girl.Notify();girl.SetOrder(bakeChickenWingCommand1);girl.Notify();Console.Read();}}//服務員public class Waiter{private Command command;//設置訂單public void SetOrder(Command command){this.command = command;}//通知執行public void Notify(){command.ExcuteCommand();}}//抽象命令public abstract class Command{protected Barbecuer receiver;public Command(Barbecuer receiver){this.receiver = receiver;}//執行命令abstract public void ExcuteCommand();}//烤羊肉串命令class BakeMuttonCommand : Command{public BakeMuttonCommand(Barbecuer receiver): base(receiver){ }public override void ExcuteCommand(){receiver.BakeMutton();}}//烤雞翅命令class BakeChickenWingCommand : Command{public BakeChickenWingCommand(Barbecuer receiver): base(receiver){ }public override void ExcuteCommand(){receiver.BakeChickenWing();}}//烤肉串者public class Barbecuer{public void BakeMutton(){Console.WriteLine("烤羊肉串!");}public void BakeChickenWing(){Console.WriteLine("烤雞翅!");}}}

可以對比一下代碼的不同！！會發現我刪了一些，更簡單的實現了。

轉載于:https://www.cnblogs.com/cxeye/archive/2012/09/22/2698088.html

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