public void LoadData() { try { QLHS_BUS bus = new QLHS_BUS(); DataTable dt = bus.DSLop(); DataTable dt_1 = bus.LayKhoiLop(); dtgv_danhsachlop.DataSource = dt; cb_khoi.DataSource = dt_1; cb_khoi.DisplayMember = "MaKhoiLop"; cb_khoi.ValueMember = "MaKhoiLop"; if (dt.Rows.Count > 0) { dtgv_danhsachlop.Rows[0].Selected = true; RowSelected = new QLHS_DTO(); RowSelected.MaHocSinh = dtgv_danhsachlop.SelectedRows[0].Cells["MaHocSinh"].Value.ToString(); RowSelected.HoTen = dtgv_danhsachlop.SelectedRows[0].Cells["HoTen"].Value.ToString(); RowSelected.TenKhoiLop = dtgv_danhsachlop.SelectedRows[0].Cells["TenKhoiLop"].Value.ToString(); RowSelected.TenLop = dtgv_danhsachlop.SelectedRows[0].Cells["TenLop"].Value.ToString(); RowSelected.SiSo = dtgv_danhsachlop.SelectedRows[0].Cells["SiSo"].Value.ToString(); } } catch (Exception ex) { } }