C#类对象的事件定义
Posted jayhust
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1. 类对象代码
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Timers; namespace WinformEventTest { /// <summary> /// 定义了一个 ShowString 事件的对象类 /// </summary> internal class EventClass { /// <summary> /// 声明委托 /// </summary> /// <param name="a">委托传递的参数</param> public delegate void BroadcastEventHander(string a); /// <summary> /// 声明委托相关的事件 /// </summary> public event BroadcastEventHander Broadcast; /// <summary> /// 声明定时器 /// </summary> private Timer _timer; /// <summary> /// /// </summary> public EventClass() { _timer = new Timer(1000); _timer.Elapsed += new ElapsedEventHandler(Timer_Elapsed); _timer.Enabled = true; } /// <summary> /// 内部定时器事件,用于模拟产生事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void Timer_Elapsed(object sender, ElapsedEventArgs e) { try { Broadcast("来自 EventClass 对象事件的消息:" + DateTime.Now.ToString()); // 产生事件 } catch (Exception) { } } } }
2.Winform调用举例
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WinformEventTest { public partial class Form1 : Form { // 声明变量 EventClass _eventClass; /// <summary> /// 控制台打印字符串 /// </summary> /// <param name="a"></param> public void ConsoleShowTxt(string a) { Console.WriteLine(DateTime.Now.ToString() + " | " + a + "\n"); } public Form1() { InitializeComponent(); // Member initialize _eventClass = new EventClass(); // Member event initialize _eventClass.Broadcast += new EventClass.BroadcastEventHander(ConsoleShowTxt); // 委托类事件(Broadcast)绑定实际处理方法(ConsoleShowTxt) } } }
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