【学习笔记】事件如何使用

经过学习&＃xff0c;终于搞清了事件的使用&＃xff0c;以下附上一个小例子

事件主要使用三个类&＃xff1a;

1. 参数定义类testEventArgs&＃xff1a;继承自EventArgs&＃xff08;虽然EventArgs什么也不做&＃xff09;

2. 事件发布类monitor

3. 事件侦听类Receiver

using System;
using System.Collections.Generic;
using System.Text;namespace EventLearn
{class testArgs:EventArgs{public string msg;public testArgs(string msg){this.msg &＃61; msg;}}class monitor{public delegate void delegateHander(object sender, testArgs e);public event delegateHander pressKey;public void Run(){do{Console.WriteLine("Please press any key. Input &＃39;exit&＃39; to finish the process!");string input&＃61;Console.ReadLine();if (input &＃61;&＃61; "exit")break;pressKey(this,new testArgs(input));}while(true);}}class Receiver{public Receiver(monitor Monitor){Monitor.pressKey &＃43;&＃61; new monitor.delegateHander(this.process);}public void process(object sender, testArgs e){Console.WriteLine("You have input the string: {0}", e.msg);}}
}

主程序如下&＃xff1a;

using System;
using System.Collections.Generic;
using System.Text;namespace EventLearn
{class Program{static void Main(string[] args){monitor Monitor &＃61; new monitor();Receiver receiver &＃61; new Receiver(Monitor);Monitor.Run();Console.ReadKey();}}
}