//刪除        protected void btnDelete_Click(object sender, EventArgs e)        {            int id = Convert.ToInt32(this.Label3.Text);            //查看是否有子類            int count = ibll.counts(id);            //有就彈出對話框            if (count > 0)            {               //對話框代碼                  "這里怎么寫？"              //獲取對話框點擊確定還是取消                  "這里怎么寫？"              //是確定就刪除            }        }