private void btxoa_Click(object sender, EventArgs e) { DialogResult dr = MessageBox.Show("Ban co chac muon xoa", "Xac nhan", MessageBoxButtons.YesNo, MessageBoxIcon.Question); if (dr == DialogResult.Yes) { //xoa if (dhbus.xoaLichSu(datalichsu.CurrentRow.Cells[0].Value.ToString())) { MessageBox.Show("Xoa thanh cong", "Thong bao", MessageBoxButtons.OK, MessageBoxIcon.Information); } else { MessageBox.Show("Xoa that bai", "Thong bao", MessageBoxButtons.OK, MessageBoxIcon.Error); } } else { return; } LichSu_Load(sender, e); }