1
我有一个集线器类,有一个“在线”用户的静态集合,我有另一个集线器类,我想能够显示第一个集线器的“在线”用户我将如何去做到这一点,具体来说,我该如何让2个集线器类互相交谈并在它们之间共享数据(我的静态集合)在我的集线器类中访问内部静态集合
我有一个集线器类,有一个“在线”用户的静态集合,我有另一个集线器类,我想能够显示第一个集线器的“在线”用户我将如何去做到这一点,具体来说,我该如何让2个集线器类互相交谈并在它们之间共享数据(我的静态集合)在我的集线器类中访问内部静态集合
简单版本:让第一类公开一个类event
,另一个实现事件监听器。
using System;
namespace EventSample
{
// Class that contains the data for
// the alarm event. Derives from System.EventArgs.
//
public class AlarmEventArgs : EventArgs
{
private bool snoozePressed;
private int nrings;
//Constructor.
//
public AlarmEventArgs(bool snoozePressed, int nrings)
{
this.snoozePressed = snoozePressed;
this.nrings = nrings;
}
// The NumRings property returns the number of rings
// that the alarm clock has sounded when the alarm event
// is generated.
//
public int NumRings
{
get { return nrings;}
}
// The SnoozePressed property indicates whether the snooze
// button is pressed on the alarm when the alarm event is generated.
//
public bool SnoozePressed
{
get {return snoozePressed;}
}
// The AlarmText property that contains the wake-up message.
//
public string AlarmText
{
get
{
if (snoozePressed)
{
return ("Wake Up!!! Snooze time is over.");
}
else
{
return ("Wake Up!");
}
}
}
}
// Delegate declaration.
//
public delegate void AlarmEventHandler(object sender, AlarmEventArgs e);
// The Alarm class that raises the alarm event.
//
public class AlarmClock
{
private bool snoozePressed = false;
private int nrings = 0;
private bool stop = false;
// The Stop property indicates whether the
// alarm should be turned off.
//
public bool Stop
{
get {return stop;}
set {stop = value;}
}
// The SnoozePressed property indicates whether the snooze
// button is pressed on the alarm when the alarm event is generated.
//
public bool SnoozePressed
{
get {return snoozePressed;}
set {snoozePressed = value;}
}
// The event member that is of type AlarmEventHandler.
//
public event AlarmEventHandler Alarm;
// The protected OnAlarm method raises the event by invoking
// the delegates. The sender is always this, the current instance
// of the class.
//
protected virtual void OnAlarm(AlarmEventArgs e)
{
AlarmEventHandler handler = Alarm;
if (handler != null)
{
// Invokes the delegates.
handler(this, e);
}
}
// This alarm clock does not have
// a user interface.
// To simulate the alarm mechanism it has a loop
// that raises the alarm event at every iteration
// with a time delay of 300 milliseconds,
// if snooze is not pressed. If snooze is pressed,
// the time delay is 1000 milliseconds.
//
public void Start()
{
for (;;)
{
nrings++;
if (stop)
{
break;
}
else
{
if (snoozePressed)
{
System.Threading.Thread.Sleep(1000);
}
else
{
System.Threading.Thread.Sleep(300);
}
AlarmEventArgs e = new AlarmEventArgs(snoozePressed, nrings);
OnAlarm(e);
}
}
}
}
// The WakeMeUp class has a method AlarmRang that handles the
// alarm event.
//
public class WakeMeUp
{
public void AlarmRang(object sender, AlarmEventArgs e)
{
Console.WriteLine(e.AlarmText +"\n");
if (!(e.SnoozePressed))
{
if (e.NumRings % 10 == 0)
{
Console.WriteLine(" Let alarm ring? Enter Y");
Console.WriteLine(" Press Snooze? Enter N");
Console.WriteLine(" Stop Alarm? Enter Q");
String input = Console.ReadLine();
if (input.Equals("Y") ||input.Equals("y"))
{
return;
}
else if (input.Equals("N") || input.Equals("n"))
{
((AlarmClock)sender).SnoozePressed = true;
return;
}
else
{
((AlarmClock)sender).Stop = true;
return;
}
}
}
else
{
Console.WriteLine(" Let alarm ring? Enter Y");
Console.WriteLine(" Stop Alarm? Enter Q");
String input = Console.ReadLine();
if (input.Equals("Y") || input.Equals("y"))
{
return;
}
else
{
((AlarmClock)sender).Stop = true;
return;
}
}
}
}
// The driver class that hooks up the event handling method of
// WakeMeUp to the alarm event of an Alarm object using a delegate.
// In a forms-based application, the driver class is the
// form.
//
public class AlarmDriver
{
public static void Main(string[] args)
{
// Instantiates the event receiver.
WakeMeUp w = new WakeMeUp();
// Instantiates the event source.
AlarmClock clock = new AlarmClock();
// Wires the AlarmRang method to the Alarm event.
clock.Alarm += new AlarmEventHandler(w.AlarmRang);
clock.Start();
}
}
}
了解更多关于MSDN。
1)如果可见度足够高,您可以从appdomain中的任何位置使用'ClassName.MemberName'访问静态成员。 2)IMO的用户列表不应该是静态的。 – CodesInChaos 2012-08-09 20:07:34