將事件附加到動態創建的按鈕單擊

Question

我想將事件附加到在運行時生成的單擊按鈕。直到這一點，我寫了代碼，但不能將按鈕的ID傳遞給方法。這裏是我的代碼

此代碼沒有通過任何錯誤，另一個問題是點擊事件後控件被沖走。如何防止這一點？

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

嘗試，

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

或

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

Answer 2

試試這個

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(); 
}