C#关于委托与事件的例子

/// <summary>
/// 事件的参数类
/// </summary>
public class EatEventArgs : EventArgs
{
public string hotelsName;
public int moneyOut;
}

/// <summary>
/// 事件的发送者
/// </summary>
public class Mastor
{
//声明一个委托
public delegate void EatEventHandles(object sender, EatEventArgs e);
//声明一个事件
public event EatEventHandles EatEvent;

//触发事件函数
public void OnEatEvent(EatEventArgs e)
{
if (EatEvent != null)
{
EatEvent(this, e);
}
}

//饿的时候执行‘触发函数’
public void Hungry()
{
Console.WriteLine("主人说：饿了，要吃饭，地点老地方，消费金额老价钱");
EatEventArgs e = new EatEventArgs();
e.hotelsName = "鲍翅皇宫";
e.moneyOut = 10000;
OnEatEvent(e);
}
}

/// <summary>
/// 事件的处理者
/// </summary>
public class Servant
{
//构造函数
public Servant(Mastor mastor)
{
mastor.EatEvent += new Mastor.EatEventHandles(this.Arrange);
}
//委托的处理函数
public void Arrange(object sender, EatEventArgs e)
{
//new Mastor().EatEvent+=new Mastor.EatEventHandles(Arrange);
Console.WriteLine("主人稍等，我这就安排");
System.Threading.Thread.Sleep(5000);
Console.WriteLine();
Console.WriteLine("主人，{0}饭店的{1}大餐已经安排好，请慢用……", e.hotelsName, e.moneyOut);
}
}

/// <summary>
/// 调用
/// </summary>
public class Test3
{
public static void Main()
{
//创建事件发送者的实例
Mastor mastor = new Mastor();
//创建事件处理者的实例
Servant servant = new Servant(mastor);
//将处理者与发送者关联起来
//mastor.EatEvent += new Mastor.EatEventHandles(servant.Arrange);
//事件发送者开始触发事件
mastor.Hungry();

}
}