c# - 将事件附加到动态创建的按钮单击

Question

我想将事件附加到在运行时生成的单击按钮。到目前为止，我已经编写了代码，但无法将按钮的 ID 传递给方法。这是我的代码

这段代码没有出现任何错误，另一个问题是点击事件后控件被冲走。如何防止这种情况？

protected void Button1_Click(object sender, EventArgs e)
   {
     int i = int.Parse(TextBox1.Text);
     for (int x = 1; x <= i; x++)
     {
       Button b = new Button();
       b.ID = "btn_" + x.ToString();
       b.Text = "btn_" + x.ToString();
       b.Click += new System.EventHandler(myEventHandler);
       pnlHolder.Controls.Add(b);
     }
   }

 private void myEventHandler(object sender, EventArgs e)
 {
   txtMain.Text = sender.ToString(); // I want to know which button was pressed
 }

Answer 1

尝试，

txtMain.Text = (sender as Button).Name;

或者

txtMain.Text = (sender as Button).Text;

Answer 2

试试这个

 private void myEventHandler(object sender, EventArgs e)
 {
   Button b = (Button) sender;
   txtMain.Text = b.ID;
   //
   txtMain.Text = b.Text;

   if(b.ID == "button1")
     doThis();
   else if(b.ID == "button2")
     doThat();
 }