private void btnOK_Click(object sender, System.EventArgs e) { if (!CheckCardSN(CardSN)) { //remove comment // MsgBox.Show("卡号错误!" + Environment.NewLine + "卡号长度必须为16位,并且只能由数字或 A - F 的字母组成!"); return; } bool snExist; snExist = XGDB.CheckCardSNExist(CardSN.Trim(), _editId); if (snExist) { MsgBox.Show("卡号已经存在!"); return; } DialogResult = DialogResult.OK; Close(); }