嘱托事件

class PubEventArgs : EventArgs    {        private readonly string _magname;        public string Magname        {            get { return _magname; }        }         public PubEventArgs(string magname)        {            _magname = magname;        }    }    class Event//创建事件类    {        public delegate void PubComputerEventHandle(object sender,PubEventArgs e);//声明委托        public event PubComputerEventHandle PubComputer;//创建委托链，即事件        public delegate void PubLifeEventHandle(object sender, PubEventArgs e);        public event PubLifeEventHandle PubLife;        public virtual void OnComputer(PubEventArgs e)        {            PubComputerEventHandle handle = PubComputer;            if (handle != null)            {                handle(this,e);            }        }        public virtual void OnLife(PubEventArgs e)        {            PubLifeEventHandle handle = PubLife;            if (handle != null)            {                handle(this, e);            }        }        public void IsComputer(string magname)//创建触发事件过程        {            Console.WriteLine("发行"+magname+"杂志");            OnComputer(new PubEventArgs(magname));        }        public void IsLife(string magname)        {            Console.WriteLine("发行" + magname + "杂志");            OnComputer(new PubEventArgs(magname));        }    }    class Man//创建操作主体    {        public string name;        public Man(string name)        {            this.name = name;        }        public void Order(object sender, PubEventArgs e)//在主体中创建被委托的函数        {            Console.WriteLine(name + "订阅" + e.Magname + "刊物");        }    }    class Program    {        static void Main(string[] args)        {            Event e = new Event();//事件建好            Man zs = new Man("张三");//主体建好            e.PubComputer += new Event.PubComputerEventHandle(zs.Order);//调用主体的被委托函数            Man ls = new Man("李四");            e.PubComputer += new Event.PubComputerEventHandle(ls.Order);            e.PubLife += new Event.PubLifeEventHandle(ls.Order);            e.IsComputer("电脑");//触发事件            e.IsLife("生活");            Console.Read();        }    }