void load_data() { PhieuNhapDTO pn = new PhieuNhapDTO(); pn.ma_phieu_nhap = txtMaPN.Text; dgvSanPham.DataSource = SanPhamBUS.Load_DSSP(); cbxLSP.DataSource = cbxLoaiSP.DataSource = LoaiSanPhamBUS.Load_DSLSP(); dgvChitietPN.DataSource = PhieuNhapBUS.Load_DSMaPN(pnh); cbxLSP.DisplayMember = cbxLoaiSP.DisplayMember = "ten_loai_sp"; cbxLSP.ValueMember = cbxLoaiSP.ValueMember = "ma_loai"; cbxNVLPN.DataSource = NhanVienBUS.GetDSNV(); cbxNVLPN.DisplayMember = "ten_nv"; cbxNVLPN.ValueMember = "ma_nv"; cbxNCC.DataSource = NhaCCBUS.Load_DSNCC(); cbxNCC.DisplayMember = "ten_ncc"; cbxNCC.ValueMember = "ma_ncc"; groupBox2.Enabled = false; }