原文链接http://blog.csdn.net/joyhen/article/details/8500211
最近在看委托，然后看到事件，以前一直很模糊，关于事件的触发者和响应者的关联。贴一个简单的例子：
1.新建一个类Control.cs
using System; namespace EventComplex { /* * C#中的事件处理实际上是一种具有特殊签名的delegate */ public class Control { /// <summary> /// 代表事件发送者 /// </summary> /// <param name="sender">代表事件发送者</param> /// <param name="e">事件参数类 /// <remarks>用来包含与事件相关的数据，所有的事件参数类都必须从System.EventArgs类派生</remarks> /// </param> public delegate void MyEventHandler(object sender, MyEventArgs e);//System.EventArgs e public event MyEventHandler MyEvent; public Control() { this.MyEvent += new MyEventHandler(RaiseSomeEvent); } /// <summary> /// 一个事件 /// </summary> public void RaiseSomeEvent(object sender, MyEventArgs e) { Console.WriteLine("hello " + e.ParamName); Console.ReadLine(); } public void RiseSomeEvent() { //System.EventArgs e = new System.EventArgs(); Console.Write("Please input 'Name':"); string _param = Console.ReadLine();//ReadLine:按下回车以后才读取，然后触发MyEvent事件 //if (_param.Equals("jon"))//在用户输入jon的情况下触发事件，否则不触发 MyEvent(this, new MyEventArgs(_param));//MyEvent(this,e) } } public class MyEventArgs : System.EventArgs { public string ParamName; public MyEventArgs(string _name) { ParamName = _name; } } }
2.我们去Main函数里面测试一下;
public static void demo4() { Control ctr = new Control(); ctr.MyEvent += new Control.MyEventHandler(ResponseSomeEvent); ctr.RiseSomeEvent(); } public static void ResponseSomeEvent(object sender, EventArgs e) { Console.WriteLine("Some event occur!"); }
static void Main(string[] args) { demo4(); }
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