C# 建立 EventHandler & 移除 EventHandler
Form1.cs |
public Form1() { InitializeComponent(); button3.Text = "Remove Button 5 EventHandler"; button4.Text = "Add Button 5 EventHandler"; } private void button3_Click(object sender, EventArgs e) { button5.Click -= new System.EventHandler(this.button5_Click); label1.Text = ""; } private void button4_Click(object sender, EventArgs e) { button5.Click += new System.EventHandler(this.button5_Click); label1.Text = ""; } private void button5_Click(object sender, EventArgs e) { label1.Text = "Event Active"; } |