source :
source
此例的功能是共用同一個Click事件，當按下button時，顯示該button的Text文字
如果一個按鈕一個事件的話，程式碼就是像下面那麼長，本例使用三個按鈕，
有15行
private void button1_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
MessageBox.Show(btn.Text);
}
private void button2_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
MessageBox.Show(btn.Text);
}
private void button3_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
MessageBox.Show(btn.Text);
}
如果我們共用同一個click事件，程式碼只有5行
private void button1_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
MessageBox.Show(btn.Text);
}
為了方便使用，我在InitializeComponent(); 下加上以下程式碼
button1.Click += new System.EventHandler(button1_Click);//按下button1觸發button1_Click
button2.Click += new System.EventHandler(button1_Click);//按下button2觸發button1_Click
button3.Click += new System.EventHandler(button1_Click);//按下button3觸發button1_Click
以下為此範例之完整原始碼
- 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 ex11
- {
- public partial class Form1 : Form
- {
- public Form1()
- {
- InitializeComponent();
- button1.Click += new System.EventHandler(button1_Click);
- button2.Click += new System.EventHandler(button1_Click);
- button3.Click += new System.EventHandler(button1_Click);
- }
-
- private void button1_Click(object sender, EventArgs e)
- {
- Button btn = (Button)sender;
- MessageBox.Show(btn.Text);
- }
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- }
- }
