using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class Design_Pattern_Command : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Controller controller = new Controller();
Hello hello = new Hello();
HelloCommand helloCommand = new HelloCommand(hello);
controller.SetCommand(0, helloCommand);
Bye bye = new Bye();
ByeCommand byeCommand = new ByeCommand(bye);
controller.SetCommand(1, byeCommand);
Good good = new Good();
GoodCommand goodCommand = new GoodCommand(good);
controller.SetCommand(2, goodCommand);
controller.OnPush(2);
controller.OnPush(0);
controller.OnPush(1);
}
}
public class Hello
{
public void SayHello()
{
System.Web.HttpContext.Current.Response.Write("Hello!");
}
}
public class Bye
{
public void SayBye()
{
System.Web.HttpContext.Current.Response.Write("Bye!");
}
}
public class Good
{
public void SayGood()
{
System.Web.HttpContext.Current.Response.Write("Good!");
}
}
public interface ICommand
{
void Execute();
}
public class HelloCommand : ICommand
{
private Hello _hello;
public HelloCommand(Hello hello)
{
this._hello = hello;
}
public void Execute()
{
this._hello.SayHello();
}
}
public class ByeCommand : ICommand
{
private Bye _bye;
public ByeCommand(Bye bye)
{
this._bye = bye;
}
public void Execute()
{
this._bye.SayBye();
}
}
public class GoodCommand : ICommand
{
private Good _good;
public GoodCommand(Good good)
{
this._good = good;
}
public void Execute()
{
this._good.SayGood();
}
}
public class Controller
{
ICommand[] commands = new ICommand[3];
public void SetCommand(int slot, ICommand command)
{
commands[slot] = command;
}
public void OnPush(int slot)
{
commands[slot].Execute();
}
}