c#事件示例代码

FlyEventArgs.cs

using System;

namespace ConsoleApplication1
{
 /// <summary>
 /// FlyEventArgs 的摘要说明。
 /// </summary>
 public class FlyEventArgs:EventArgs
 {
  private string status;
  public string Status
  {
   get
   {
    return status;
   }
  }
  public FlyEventArgs(string m):base()
  {
   this.status=m;
  }
 }
}

FlyBird.cs
using System;

namespace ConsoleApplication1
{
 
 
 public class FlyBird
 { 
  public event FlyEventHandler OnFly;

  public void OnFlyHandler(FlyEventArgs e)
  {
   if(OnFly!=null)
   {
    OnFly(this,e);
   }
  }   
  public FlyBird()
  {
            
  }

 }
}

Sky.cs
using System;

namespace ConsoleApplication1
{
 public delegate void FlyEventHandler(object sender, FlyEventArgs e);
 /// <summary>
 /// Sky 的摘要说明。
 /// </summary>
 public class Sky
 {
  public void onFly(object sender,FlyEventArgs e)
  {
   Console.Write(e.Status);
  }
  public Sky(FlyBird bird)
  {
   bird.OnFly+=new FlyEventHandler(onFly);
  }
  [STAThread]
  static void Main(string[] args)
  {
   FlyBird bird=new FlyBird();
   Sky sky=new Sky(bird);
   FlyEventArgs ar=new FlyEventArgs("起飞....");    
   bird.OnFlyHandler(ar);   
  }
 }
}