private void frmCapNhatSach_Load(object sender, EventArgs e) { bdsTacGia.DataSource = tgBUS.LayDanhSach(); bdsTheLoai.DataSource = tlBUS.LayDanhSach(); bdsNhaXuatBan.DataSource = nxbBUS.LayDanhSach(); SachDTO sDTO = sBUS.LaySachTheoMa(masach); txtMaSach.Text = masach.ToString(); txtTen.Text = sDTO.Ten; cboTacGia.SelectedValue = sDTO.MaTacGia; cboTheLoai.SelectedValue = sDTO.MaTheLoai; cboNhaXuatBan.SelectedValue = sDTO.MaNXB; dtpNgayXuatBan.Value = sDTO.NgayXuatBan; txtGhiChu.Text = sDTO.GhiChu; }