c# 委托实例

 class Program

    {

        static void HandleDemoEvent(object sender, EventArgs e)

        {

            Console.WriteLine("Handled by HandleDemoEvent");

        }

        static void Main(string[] args)

        {

            Console.WriteLine("c#1 委托示例");

            Person jon = new Person("Jon");

            Person tom = new Person("Tom");

            StringProcessor josVoice, tomsVoice, background;

            //创建3个委托实例

            josVoice = new StringProcessor(jon.Say);

            tomsVoice = new StringProcessor(tom.Say);

            background = new StringProcessor(Background.Note);



            josVoice("Hello,Lichuan");

            tomsVoice.Invoke("Hello,Doddy!");

            background("An airplane flies past.");







            Console.WriteLine("c#2 委托示例");

            EventHandler handler;

            handler = new EventHandler(HandleDemoEvent);//指定委托类型和方法

            handler(null, EventArgs.Empty);



            handler = HandleDemoEvent;//隐式转换成委托实例

            handler(null, EventArgs.Empty);



            handler = delegate(object sender, EventArgs e)//用一个匿名方法来指定操作

            {

                Console.WriteLine("Handled anonymously");

            };

            handler(null, EventArgs.Empty);



            handler = delegate         //使用匿名方法的简写

            {

                Console.WriteLine("Handled anonymously again");

            };

            handler(null, EventArgs.Empty);











            Console.ReadKey();

        }

    }

 

using System;

using System.Collections.Generic;

using System.Data.SqlClient;

using System.Linq;

using System.Text;

using System.Threading.Tasks;



namespace SRLJCSHAP.委托.Demo

{

    delegate void StringProcessor(string input);//声明委托类型

    public class Person

    {

        string name;

        public Person(string Name)

        {

            this.name = Name;

        }

        //声明兼容的实例方法

        public void Say(string Msg)

        {

            Console.WriteLine("{0} says: {1}", name, Msg);

        }





    }

    public class Background

    {

        //声明兼容的静态方法

        public static void Note(string note)

        {

            Console.WriteLine("({0})", note);

        }



       

    }

}