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@@ -0,0 +1,178 @@
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+using System;
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+using System.Collections.Generic;
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+using System.Linq;
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+using System.Text;
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+using System.Threading.Tasks;
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+
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+namespace CommandPattern
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+{
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+ /// <summary>
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+ /// 调用者角色
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+ /// </summary>
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+ public class Invoker
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+ {
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+ /// <summary>
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+ /// 申明调用的命令，并用构造函数注入
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+ /// </summary>
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+ private readonly Command command;
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+
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+ public string InovkerName { get; set; }
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+
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+ public Invoker(Command command)
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+ {
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+ this.command = command;
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+ }
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+
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+ /// <summary>
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+ /// 调用以执行具体命令
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+ /// </summary>
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+ public void Invoke()
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+ {
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+ Console.WriteLine(string.Format("『{0}』下达命令：{1}", this.InovkerName, this.command.CommandName));
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+ this.command.Execute();
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+ }
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+ }
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+
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+ /// <summary>
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+ /// 命令者角色
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+ /// </summary>
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+ public abstract class Command
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+ {
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+ protected readonly Receiver receiver;
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+
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+ public string CommandName { get; set; }
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+
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+ public Command(Receiver receiver)
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+ {
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+ this.receiver = receiver;
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+ }
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+
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+ /// <summary>
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+ /// 抽象执行具体命令方法
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+ /// 由之类实现
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+ /// </summary>
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+ public abstract void Execute();
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+ }
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+
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+ /// <summary>
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+ /// 武力收复台湾命令
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+ /// </summary>
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+ public class RecaptureTaiwanByFocusCommand : Command
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+ {
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+ string commandName = "武力收复台湾！";
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+
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+ /// <summary>
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+ /// 重写默认构造函数，指定默认接收者
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+ /// 以降低高层模块对底层模块的依赖
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+ /// </summary>
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+ public RecaptureTaiwanByFocusCommand() :
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+ base(new OperationCenter())
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+ {
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+ base.CommandName = commandName;
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+ }
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+
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+ /// <summary>
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+ /// 也可通过构造函数重新指定接收者
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+ /// </summary>
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+ /// <param name="receiver"></param>
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+ public RecaptureTaiwanByFocusCommand(Receiver receiver)
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+ : base(receiver)
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+ {
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+ base.CommandName = commandName;
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+ }
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+
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+ public override void Execute()
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+ {
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+ this.receiver.Plan();
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+ this.receiver.Action();
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+ }
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+ }
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+
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+ /// <summary>
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+ /// 和平方式收复台湾命令
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+ /// </summary>
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+ public class RecaptureTaiwanByPeaceCommand : Command
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+ {
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+ string commandName = "和平收复台湾！";
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+ /// <summary>
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+ /// 重写默认构造函数，指定默认接收者
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+ /// 以降低高层模块对底层模块的依赖
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+ /// </summary>
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+ public RecaptureTaiwanByPeaceCommand() :
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+ base(new NegotiationCenter())
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+ {
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+ base.CommandName = commandName;
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+ }
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+
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+ /// <summary>
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+ /// 也可通过构造函数重新指定接收者
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+ /// </summary>
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+ /// <param name="receiver"></param>
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+ public RecaptureTaiwanByPeaceCommand(Receiver receiver)
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+ : base(receiver)
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+ {
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+ base.CommandName = commandName;
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+ }
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+
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+ public override void Execute()
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+ {
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+ this.receiver.Plan();
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+ this.receiver.Action();
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+ }
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+ }
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+
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+
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+ /// <summary>
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+ /// 接收者角色
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+ /// </summary>
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+ public abstract class Receiver
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+ {
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+ protected string ReceiverName { get; set; }
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+
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+ //定义每个执行者都必须处理的业务逻辑
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+ public abstract void Plan();
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+ public abstract void Action();
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+ }
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+
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+
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+ /// <summary>
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+ /// 作战中心
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+ /// </summary>
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+ public class OperationCenter : Receiver
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+ {
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+ public OperationCenter()
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+ {
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+ this.ReceiverName = "作战中心";
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+ }
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+ public override void Plan()
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+ {
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+ Console.WriteLine(string.Format("{0}:制定作战计划。", this.ReceiverName));
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+ }
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+
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+ public override void Action()
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+ {
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+ Console.WriteLine(string.Format("{0}:海陆空按照即定作战计划作战，收复台湾！", this.ReceiverName));
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+ }
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+ }
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+
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+ /// <summary>
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+ /// 谈判中心
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+ /// </summary>
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+ public class NegotiationCenter : Receiver
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+ {
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+ public NegotiationCenter()
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+ {
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+ this.ReceiverName = "谈判中心";
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+ }
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+ public override void Plan()
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+ {
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+ Console.WriteLine(string.Format("{0}:制定谈判计划。", this.ReceiverName));
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+ }
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+
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+ public override void Action()
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+ {
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+ Console.WriteLine(string.Format("{0}:落实谈判结果，收复台湾！", this.ReceiverName));
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+ }
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+ }
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+
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+}
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jeffrey