事件是C#中一个重要的内容,MSDN上有一个自定义事件的演示示例。我看了半天有点晕,所以新建了一个winform工程添加了一个按钮,然后找出调用的程序,一对比做了一个类似的示例,就明白了。看代码有时候比看文档来得更快。
所以还是一贯的原则,来干的,不来稀的。
转自:http://blog.csdn.net/callmeback/article/details/8330931
using System; namespace TestEventArgs { /// <summary> /// 这个类对应于EventArgs,做对比学习。 /// 添加两个内容:info1,info2。 /// </summary> public class MyEventArgs : EventArgs { private String info1; private UInt32 info2; public MyEventArgs(String info1, UInt32 info2) { this.info1 = info1; this.info2 = info2; } public String Info1 { get { return this.info1; } set { this.info1 = value; } } public UInt32 Info2 { get { return this.info2; } set { this.info2 = value; } } } /// <summary> /// 仿真Button按钮 /// </summary> public class MyButton { public delegate void MyEvnetHandler(object sender, MyEventArgs e); /// <summary> /// 按钮点击的次数计数器 /// </summary> public static UInt32 clicked_num = 0; public event MyEvnetHandler MyClick; public void 触发() { MyEventArgs arg = new MyEventArgs(DateTime.UtcNow.ToString(), ++clicked_num); MyClick(this, arg); } } /// <summary> /// 仿真Form窗体 /// </summary> public class MyForm { public MyButton 按钮; public MyForm() { 按钮 = new MyButton(); 按钮.MyClick += new MyButton.MyEvnetHandler(this.button_Clicked); } public void button_Clicked(object sender, MyEventArgs e) { Console.WriteLine("button clicked(sender is:" + sender.ToString() + "; info1 = " + e.Info1 + "; info2 = " + e.Info2); } } class Program { static void Main(string[] args) { MyForm 窗体 = new MyForm(); for (int i = 0; i < 10; i++ ) { 窗体.按钮.触发(); System.Threading.Thread.Sleep(500); } Console.WriteLine("Press any key to continue..."); Console.ReadKey(); } } }
不同的地方:
1 本示例中delegate myevnethandler是mybutton类内部成员,在系统中eventhander是system命名空间下的一个成员。