public void ShowPhongBan()
        {
            DataTable dt = new DataTable();

            dt = pbBus.GetData();
            cmbMaPB.DataSource    = dt;
            cmbMaPB.DisplayMember = "TenPB";
            cmbMaPB.ValueMember   = "MaPB";
        }
 private void HienThi()
 {
     dgvPhongBan.DataSource = Bus.GetData();
 }