using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace EventSamle
{public class AlarmEventArgs : System.EventArgs//事件参数{private  bool _snoozPresed;//懒惰键private int _nrings;//响了几次public bool SnoozPressed{get { return _snoozPresed; }set { _snoozPresed = value; }}public int NumRings{get { return _nrings; }set { _nrings = value; }}public string AlarmText//提醒{get{if (SnoozPressed)return ("Wake up!!! snooze time is over.");elsereturn ("Wake up!!!");}}public AlarmEventArgs(bool snooz, int nrings){this._snoozPresed = snooz;this._nrings = nrings;}}public delegate void AlarmEventHander(object sender, AlarmEventArgs e);//1.声明委托事件处理函数，其实是个类public class AlarmClock//产生事件的类{private bool _snoozPressed = false;private int _nrings = 0;private bool _stop = false;public bool Stop//是否停止。事件类的域，这个例子中事件处理函数会反馈修改这个域的值{get { return _stop; }set { _stop = value; }}public bool SnoozPressed//是否懒惰。事件类的域，这个例子中事件处理函数会反馈修改这个域的值{get { return _snoozPressed; }set { _snoozPressed = value; }}public event AlarmEventHander Alarm;//2.声明一个事件，或叫做产生一个委托事件处理函数的实例protected virtual void OnAlarm(AlarmEventArgs e)//3.触发事件的函数，protected{if (Alarm != null)//一定要加！{Alarm(this, e);}}public void Start()//调用这个函数后开始触发事件，传入参数{for (; ; ){_nrings++;if (Stop)break;else if (SnoozPressed){System.Threading.Thread.Sleep(1000);AlarmEventArgs e = new AlarmEventArgs(SnoozPressed, _nrings);OnAlarm(e);}else{System.Threading.Thread.Sleep(300);AlarmEventArgs e = new AlarmEventArgs(SnoozPressed, _nrings);OnAlarm(e);}}}}public class WakeUp//处理事件的类{public void RingRang(object sender, AlarmEventArgs e)//4.处理事件的函数，同delegate签名一样{Console.WriteLine(e.AlarmText+"\n");if(!e.SnoozPressed){Console.WriteLine(" Let alarm ring? Enter Y");Console.WriteLine(" Stop Alarm? Enter Q");Console.WriteLine(" Press Snooze? Enter N");string input = Console.ReadLine();if(input.Equals("Y")||input.Equals("y")) return;else  if(input.Equals("Q")||input.Equals("q")) {((AlarmClock)sender).Stop = true;//这个例子中可以向发送者反馈信息return;}else{((AlarmClock)sender).SnoozPressed = 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;if(input.Equals("Q")||input.Equals("q")) {((AlarmClock)sender).Stop = true;return;}}}}public class AlarmDriver//测试类{  public static void Main (string[] args){  // Instantiates the event receiver.WakeUp w= new WakeUp();// Instantiates the event source.AlarmClock clock = new AlarmClock();// Wires the AlarmRang method to the Alarm event.clock.Alarm += new AlarmEventHander(w.RingRang);//把事件处理函数注册到事件处理队列中clock.Start();}}   }