private void FrmSuaSach_Load(object sender, EventArgs e) { DataTable tb = Sach_DAO.TimKiemSach("where MaSach=" + MaSach.Trim()); txtMasach.Text = tb.Rows[0]["MaSach"].ToString(); txtMasach.ReadOnly = true; txtTensach.Text = tb.Rows[0]["TenSach"].ToString(); txtGiaban.Text = tb.Rows[0]["GiaBan"].ToString(); txtMota.Text = tb.Rows[0]["MoTa"].ToString(); txtNgaynhap.Text = tb.Rows[0]["NgayNhap"].ToString(); txtSoluong.Text = tb.Rows[0]["SoLuong"].ToString(); txtMaCD.Text = tb.Rows[0]["MaCD"].ToString(); txtMaCD.ReadOnly = true; txtMaNXB.Text = tb.Rows[0]["MaNXB"].ToString(); txtMaNXB.ReadOnly = true; }