c#委托与事件

1.发布一个事件与委托

namespace 类的事件
{

//定义一个委托()
    public delegate void TestEventDelegate(EventArgs e); //object sender,

    class clsTestEvent
    {
        private static int x;
//定义发布事件
        public static event TestEventDelegate TestEvent;

//发布事件通用格式，进行安全性检查


        private static void RaiseTestEvent(EventArgs e)
        {
            Debug.Print("发出了事件通知");
            //TestEventDelegate temp = TestEvent;

            if (TestEvent != null)
            {
                TestEvent(e); //this,

            }

        }

        public static int X
        {
            get { return x; }
            set
            {

//引发事件
                RaiseTestEvent(EventArgs.Empty);
                x = value;
            }
        }
    }
}

2.订阅事件

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;

namespace 类的事件
{
    class Program
    {
        static void Main(string[] args)
        {
            //

            System.Console.WriteLine("hehe");
            //clsTestEvent temp = new clsTestEvent();

            //temp.TestEvent +=new TestEventDelegate(temp_TestEvent);

            //temp.X = 1;

            //静态成员用法
//使用委托订阅事件
            clsTestEvent.TestEvent += new TestEventDelegate(temp_TestEvent);
            clsTestEvent.X = 1;
            System.Console.ReadKey();
        }
        private static void temp_TestEvent( System.EventArgs e) //object sender,

        {
            System.Console.WriteLine("Event received from ");
            //System.Console.WriteLine(sender.ToString());

        }

    }
}


3.取消订阅

clsTestEvent.TestEvent -= new TestEventDelegate(temp_TestEvent);