代码片_记录

• 委托/事件_开水报警

static void Main()
        {
            var listener = new Listener();
            var boilingEvent = new TempterLisenting();
            listener.Register(boilingEvent);

            for (int i = 93; i < 101; i++)
            {
                boilingEvent.WaterTempterAdd(i);
            }
        }

//水温事件
    public class WaterTempterEventAgrs
    {
        private int waterTempter;

        public int WaterTempter
        {
            get { return waterTempter; }
            set { waterTempter = value; }
        }

        public WaterTempterEventAgrs(int waterTempter)
        {
            this.WaterTempter = waterTempter;
        }
    }

    //事件类，定义事件订阅消息及触发事件
    public class TempterLisenting
    {
        //public event EventHandler<WaterTempterEventAgrs> WaterEvent;
        public delegate void WaterEventHandler(object sender, WaterTempterEventAgrs e);
        public event WaterEventHandler WaterEvent;

        public void WaterTempterAdd(int waterTempter)
        {
            if (WaterEvent != null)
            {
                WaterEvent(this, new WaterTempterEventAgrs(waterTempter));
            }
        }
    }

    //客户类，事件订阅者
    public class Listener
    {
        public void IsWaterBoiling(object sender, WaterTempterEventAgrs e)
        {
            if (e.WaterTempter >= 90 && e.WaterTempter <= 99)
            {
                Console.WriteLine("the water is will boiling:{0}", e.WaterTempter);
            }
            else if (e.WaterTempter == 100)
            {
                Console.WriteLine("the water is boiling:{0}", e.WaterTempter);
            }
        }

        public void Register(TempterLisenting listener)
        {
            listener.WaterEvent += IsWaterBoiling;
        }
    }

• 事件与委托_C#语言程序设计基础

namespace CodeSample
{
    public delegate void BookDelegate(string bookName, string bookType);

    public class Custormers
    {
        private string custormerName;
        private string custormerBooktype;

        public string CustormerName
        {
            get { return custormerName; }
            set { custormerName = value; }
        }

        public string CustormerBooktype
        {
            get { return custormerBooktype; }
            set { custormerBooktype = value; }
        }

        public Custormers(string m_custormerName, string m_custormerBooktype)
        {
            custormerBooktype = m_custormerBooktype;
            custormerName = m_custormerName;
        }

        public void Registre(BookStore bookStore)
        {
            bookStore.BookDelegate += BookStore_BookDelegate;
        }

        void BookStore_BookDelegate(string bookName, string bookType)
        {
            if (bookType == CustormerBooktype)
            {
                Console.WriteLine("{0},您好。您在本店预约的书类为\"{1}\"的书籍<<{2}>>到货了。", custormerName, bookType, bookName);
            }
        }
    }

    public class BookStore
    {
        public event BookDelegate BookDelegate;

        public void NewBook(string bookName, string bookType)
        {
            BookDelegate(bookName, bookType);
        }
    }

    public class CodeSampleMain
    {
        public static void Main()
        {
            BookStore bookStore = new BookStore();

            Custormers[] custormer = new Custormers[3];
            custormer[0] = new Custormers("黄**", "计算机");
            custormer[1] = new Custormers("二少", "英语");
            custormer[2] = new Custormers("**杰", "玄幻小说");

            for (int i = 0; i < custormer.Length; i++)
            {
                custormer[i].Registre(bookStore);
            }

            bookStore.NewBook("计算机组成原理", "计算机");
            bookStore.NewBook("走遍美国", "英语");
            bookStore.NewBook("紫川", "玄幻小说");

            Console.ReadKey();
        }
    }
}