C# 关于事件

class Publish
    {
        public event EventHandler eventName; //declare event named eventName


        public void inspireEvent()           // inspire the event
        {
            onEventName(new EventArgs());
        }


        public void onEventName(EventArgs e) // will use the scriber‘s method to reply the event
        {
            EventHandler handle = eventName;
            if (handle != null)
            {
                handle(this,e);
            }
        }
    }

class Scriber
    {
        public Scriber(Publish pb)
        {
            pb.eventName += howDo; // scribe the event
        }


        public void howDo(Object sender, EventArgs e)
        {
            Console.WriteLine("what a fuck day it is");
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            Publish ph = new Publish();
            Scriber sb = new Scriber(ph);


            ph.inspireEvent();		//motivate the event
        }
    }

EventHandler handle = eventBase；
eventBase(obj,e);

 class BaseEvent
    {
        public event EventHandler baseEvent;


        public virtual void draw()
        {
            Console.WriteLine("This is in base draw");
        }


        public virtual void onDraw(EventArgs e)
        {
            EventHandler handle = baseEvent;
            if (handle != null)
            {
                handle(this ,e);
            }
            Console.WriteLine("this is in base on");
        }
    }

class Derived : BaseEvent
    {
        public override void draw()
        {
            //base.draw();
            Console.WriteLine("this is in derived class");
        }


        public override void onDraw(EventArgs e)
        {
            //EventHandler handle = baseEvent;
            //baseEvent(this, e);


            base.onDraw(e);
            
        }


        public void motivateDraw()
        {
            onDraw(new EventArgs());
        }
    }

class Scribe
    {
        public Scribe(Derived dr)
        {
            dr.baseEvent += Motive;
        }


        public void Motive(Object sender, EventArgs e)
        {
            Console.WriteLine("what a fuck day");
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            Derived D = new Derived();
            BaseEvent B = new BaseEvent();
            Scribe Sb = new Scribe(D);
            D.motivateDraw();
        }
    }

namespace ConsoleApplication16InterfaceEvent
{
    interface Iface
    {
        event EventHandler faceEvent;
    }


    interface Ifoot
    {
        event EventHandler footEvent;
    }


    interface Ihand
    {
        event EventHandler footEvent;
    }
    class InterEvent : Iface,Ifoot,Ihand
    {
        public event EventHandler faceEvent;
        //public event EventHandler footEvent;
        public event EventHandler preFootEvent;
        public event EventHandler nexHandEvent;


        Object objectLock = new Object();


        event EventHandler Ifoot.footEvent
        {
            add 
            {
                lock (objectLock)
                {
                    preFootEvent += value;
                }
            }
            remove
            {
                lock (objectLock)
                {
                    preFootEvent -= value;
                }
            }
        }


        event EventHandler Ihand.footEvent
        {
            add 
            {
                lock (objectLock)
                {
                    nexHandEvent += value;
                }
            }


            remove
            {
                lock (objectLock)
                {
                    nexHandEvent -= value;
                }
            }
        }


        public void finger()
        {
            EventHandler handle = preFootEvent;
            if ( handle != null)
                preFootEvent(this,new EventArgs());


            handle = nexHandEvent;
            if (handle != null)
                nexHandEvent(this,new EventArgs());
        }
    }


}

//...............
namespace ConsoleApplication16InterfaceEvent
{
    class Scribe
    {
        public Scribe(InterEvent Et)
        {
            Ifoot foot = (Ifoot)Et;
            foot.footEvent += draw1;


            Ihand hand = (Ihand)Et;
            hand.footEvent += draw2;


            
        }


        void draw1(Object sender, EventArgs e)
        {
            Console.WriteLine("this is in Scribe draw1");
        }


        void draw2(Object sender, EventArgs e)
        {
            Console.WriteLine("this is in Scribe draw2");
        }
    }
}

//..................
namespace ConsoleApplication16InterfaceEvent
{
    class Program
    {
        static void Main(string[] args)
        {
            InterEvent EI = new InterEvent();
            Scribe Sb = new Scribe(EI);
            EI.finger();
        }
    }
}

C# 关于事件,布布扣,bubuko.com

C# 关于事件

原文：http://blog.csdn.net/ddupd/article/details/22101661