事件委托小例子

定义一个猫类

public class Cat

{

private string name;

public Cat(String name)

{

this.name=name;

}

 

//定义一个委托

public delegate void CatShoutEventHandler();

//定义一个事件

public event CatShoutEventHandler CatShout;

 

public void Shout()

{

Console.WriteLine("喵，我是猫{0}",this.name);

if(CatShout!=null)

{

CatShout();

}

}

}

 

定义一个老鼠类

public class Mouse

{

private string name;

public Mouse(String name)

{

this.name=name;

}

 

public void Run()

{

Console.WriteLine("我是老鼠{0}，猫来了，快跑啊！");

}

}

 

public class Program

{

void Main(string[] args)

{

Cat cat1=new Cat("猫1");

 

Mouse mouse1=new Mouse("老鼠一");

Mouse mouse2=new Mouse("老鼠二");

 

//订阅事件

cat1.CatShout+=new Cat.CatShoutEventHander(mouse1.Run);

cat1.CatShout+=new Cat.CatShoutEventHander(mouse2.Run);

 

cat1.Shout();

}

}