Jacklovely

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说明(2017-6-14 15:04:13):

1. 热水器案例,为了便于理解,采用了蹩脚但直观的英文命名,哼哼。

heater类,加热,声明一个委托,定义一个委托事件:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _12事件
{
    public delegate void MyDel(int temp);
    class Heater
    {
        public event MyDel del;
        private int temp;

        public int Temp
        {
            get { return temp; }
            set { temp = value; }
        }
        public void Heat()
        {
            for (int i = 0; i < 100; i++)
            {
                temp = i;
                if (temp > 95)
                {
                    if (del != null)
                    {
                        del(temp);
                    }
                }
            }
        }
    }
}

Alarmer类,警报:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _12事件
{
    class Alarmer
    {
        public void Alarm(int temp)
        {
            Console.WriteLine("滴滴滴,报警!!水已经{0}度了", temp);
        }
    }
}

ShowTemper,显示器类:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _12事件
{
    class ShowTemper
    {
        public void ShowTemp(int temp)
        {
            Console.WriteLine("屏幕显示:当前温度{0}度", temp);
        }
    }
}

main函数,委托绑定警报和显示两个方法:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _12事件
{
    class Program
    {
        static void Main(string[] args)
        {
            Heater heater = new Heater();
            Alarmer alarmer = new Alarmer();
            ShowTemper showtemper = new ShowTemper();
            heater.del += alarmer.Alarm;
            heater.del += showtemper.ShowTemp;

            heater.Heat();
            //heater.del(heater.Temp);
            Console.ReadKey();
        }
    }
}

 参考资料:

http://www.tracefact.net/CSharp-Programming/Delegates-and-Events-in-CSharp.aspx

posted on 2017-06-14 15:06  Jacklovely  阅读(599)  评论(0编辑  收藏  举报