EventHandler简析

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace day13
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btn_Click(object sender, EventArgs e)
        {
            Button btn = (Button)sender;    //实例化按钮，从而实现获得当前按钮的值
            this.txtShow.Text = btn.Text;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //通过以下代码，将按钮控件的Click事件绑定到btn_Click上面，从而实现动态注册按钮事件
            btn1.Click+=new EventHandler(btn_Click);
            btn2.Click+=new EventHandler(btn_Click);
            btn3.Click+=new EventHandler(btn_Click);
            btn4.Click+=new EventHandler(btn_Click);
            btn5.Click+=new EventHandler(btn_Click);
        }
    }
}