1. 类对象代码

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Timers; namespace WinformEventTest{    /// 
    /// 定义了一个 ShowString 事件的对象类    /// 
    internal class EventClass    {        /// 
          /// 声明委托          /// 
          /// 委托传递的参数          public delegate void BroadcastEventHander(string a);        /// 
        /// 声明委托相关的事件        /// 
        public event BroadcastEventHander Broadcast;        /// 
        /// 声明定时器        /// 
        private Timer _timer;        /// 
        ///         /// 
        public EventClass()        {            _timer = new Timer(1000);            _timer.Elapsed += new ElapsedEventHandler(Timer_Elapsed);            _timer.Enabled = true;        }        /// 
        /// 内部定时器事件，用于模拟产生事件        /// 
        ///         ///         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;        /// 
          /// 控制台打印字符串        /// 
          ///           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）        }    }}