using System;

namespace TestEvent
{
    class Program
    {
        static void Main(string[] args)
        {

            Caculator caculator = new Caculator();

            CaculateManager caculateManager = new CaculateManager();

            //事件绑定
            caculator.MyCaculator += caculateManager.Add;

            caculator.Caculate(100, 200);

            caculator.MyCaculator += caculateManager.sub;

            caculator.Caculate(100, 200);

            //事件注销
            caculator.MyCaculator -= caculateManager.Add;

            Console.Read();
        }
    }

    public class CaculateEventArgs : EventArgs
    {
        ///

/// 二元操作的第一个数
///

public readonly Int32 x;
///

/// 二元操作的第二个数
///

        public readonly Int32 y;

        public CaculateEventArgs(Int32 x, Int32 y)
        {
            this.x = x;
            this.y = y;
        }

    }

    public class Caculator
    {
        //声明事件委托
        public delegate void CaculateEventHandler(object sender, CaculateEventArgs e);

        //声明事件成员，提供外部绑定
        public event CaculateEventHandler MyCaculator;

        //提供受保护的虚方法，可以由子类来拒绝监视
        protected virtual void OnCaculate(CaculateEventArgs e)
        {
            if (MyCaculator != null)
            {
                //触发事件
                MyCaculator(this, e);
            }
        }
        //运行计算
        public void Caculate(Int32 x, Int32 y)
        {
            CaculateEventArgs e = new CaculateEventArgs(x, y);

            OnCaculate(e);
        }
    }

    public class CaculateManager
    {
        //响应事件的方法
        public void Add(object sender, CaculateEventArgs e)
        {
            Console.WriteLine(e.x+ e.y);
        }

        //响应事件的方法
        public void sub(object sender, CaculateEventArgs e)
        {
            Console.WriteLine(e.x-e.y);
        }
    }

}

ITPub博客

.Net 之事件

最新文章