MessageBox

 if (MessageBox.Show("确定删除卡号为: " + cuslistview.SelectedItems[0].SubItems[0].Text.ToString() + "姓名为: "+cuslistview .SelectedItems [0].SubItems [1].Text .ToString ()+"储值卡吗", "提示", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    cls.Getsql("delete from t_card where card_no='" + cuslistview.SelectedItems[0].SubItems[0].Text.ToString() + "'");
                    cuslistview.SelectedItems[0].Remove();
                }