private void cbMaLop_DSLH_SelectedIndexChanged(object sender, EventArgs e) { //foreach (Lop lop in listLop) // if (lop.MaLop == cbMaLop_DSLH.Text) // { // tbTenLop_DSLH.Text = lop.TenLop; // tbSiSo_DSLH.Text = lop.SiSo.ToString(); // break; // } Lop lop = lopBLL.GetLop(cbLop_DSLH.Text, cbNH_HSLH.Text); tbMaLop_DSLH.Text = lop.MaLop; tbSiSo_DSLH.Text = lop.SiSo.ToString(); LoadDSHSTheoLop(tbMaLop_DSLH.Text, cbLop_DSLH.Text); }