回调

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 using System.Web.UI.WebControls;

namespace 回调

{

    class Program

    {

        static void Main(string[] args)

        {



            /*接口回调*/

            Controller cl = new Controller(new CallBack());

            cl.Begin();

            Console.ReadKey();

        }



        class CallBack:ICallBack

        {



            public void Run()

            {

                Console.WriteLine(DateTime.Now.ToString());

            }

        }



        #region 接口回调

      

        class Controller

        {



            //ICallBack借口定义一个Run方法，所有”回调对象“都必须实现此接口，

            private ICallBack CallBackObject = null;//引用回调对象

          

            public Controller(ICallBack obj)

            {

                this.CallBackObject = obj;



            }

            public void Begin()

            {

                Console.WriteLine("敲任意键显示当前时间，按ESC键退出");

                while (Console.ReadKey(true).Key != ConsoleKey.Escape)

                {

                    CallBackObject.Run();//调用回调对象的方法

                }

            }



        }

        #endregion

       

    }

}