C#委托与事件，通俗易懂详细解释

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace @delegate

{

    //这里是充气娃娃拥有的一些特性,中国的娃娃叫声,日本的娃娃的叫声，娃娃的价格

    public class ChongQiWaWaArgs : EventArgs

    {

        public readonly string zhonggejiaofa; //中国娃娃叫声

        public readonly string yibenjiaofa; //日本娃娃叫声

        public readonly string jiage; //价格

        public ChongQiWaWaArgs(string zhonggejiaofa, string yibenjiaofa, string jiage)

        {

            this.zhonggejiaofa = zhonggejiaofa;

            this.yibenjiaofa = yibenjiaofa;

            this.jiage = jiage;

        }

    }

    //中国娃娃信息

    class zhonggejiaowawa

    {

        public static void zhonggejiaowawayanzhi(object sender, ChongQiWaWaArgs yanzhi)

        {

            Console.WriteLine("中国娃娃叫法：" + yanzhi.zhonggejiaofa + "  价格：" + yanzhi.jiage);

        }

    }

    //日本娃娃信息

    class yibenjiaowawa

    {

        public static void yibenjiaowawayanzhi(object sender, ChongQiWaWaArgs yanzhi)

        {

            Console.WriteLine("日本娃娃叫法：" + yanzhi.yibenjiaofa + "  价格：" + yanzhi.jiage);

        }

    }

    //这里是卖充气娃娃的淘宝店

    public class taobaodian

    {

        //声明一个卖充气娃娃的委托，也就是可以进货多种娃娃的仓库

        public delegate void wawa(object sender, ChongQiWaWaArgs yanzhi);

        //声明一个卖充气娃娃事件，也就是可以卖多种娃娃的店面

        public event wawa maiwawa;

        //如果有娃娃就卖娃娃

        public void MaiWaWa(ChongQiWaWaArgs yanzhi)

        {

            if (maiwawa != null)

            {

                //可以开始卖充气娃娃事件

                Console.WriteLine("娃娃专卖店：本店物美价廉,送货极速，欢迎选购！");

                maiwawa(this,yanzhi);

            }

        }

        //是否卖娃娃，做生意

        public void beginmaiwawa(ChongQiWaWaArgs yanzhi)

        {

            //已经进货娃娃了，可以卖了

            MaiWaWa(yanzhi);

        }     

    }

    //这里是给淘宝店添加各种各样商品的厂家

    class changjia

    {

        public changjia(taobaodian dianzu, ChongQiWaWaArgs waimao)

        {

            //给淘宝店添加中国、日本娃娃

            dianzu.maiwawa += new taobaodian.wawa(zhonggejiaowawa.zhonggejiaowawayanzhi);

            dianzu.maiwawa += new taobaodian.wawa(yibenjiaowawa.yibenjiaowawayanzhi);

            //淘宝店可以开始卖娃娃了

            dianzu.beginmaiwawa(waimao);

        }

    }

    public class Program

    {

        //这里是我们人们需求，想娃娃外貌和价格是怎么样的

        public static void Main()

        {

            //想要的娃娃外貌

            ChongQiWaWaArgs waimao = new ChongQiWaWaArgs("啊~啊~啊","ya ba de","100元");

            //通知厂长要给淘宝店生成一个外貌这样的娃娃，然后淘宝店才有得卖

            changjia changzhan = new changjia(new taobaodian(), waimao);

            Console.WriteLine(" ");

            Console.Write("请输入您想要娃娃（1 或者 2）：");

            string wawadaihao = Console.ReadLine();

            if (wawadaihao == "1")

            {

                Console.WriteLine("您买了一个中国娃娃  " + "花费价格为：100元.");

            }

            else if (wawadaihao == "2")

            {

                Console.WriteLine("您买了一个日本娃娃  " + "花费价格为：100元.");

            }

            else

            {

                Console.WriteLine("对不起，我们没有生成这种娃娃.");

            }

            Console.ReadKey();

        }

    }

}