public void HienThiDanhSachDauSachTheoMaTheLoai(string ma)
{
DauSach_DTO s = new DauSach_DTO();
s.MaTheLoai = int.Parse(ma);
DataTable dt = Sach_BUS.SelectSachLikeMaTheLoaiDanhSachSach(s);
colTenSach.ValueMember = "MaDauSach";
colTenSach.DisplayMember = "TenDauSach";
colTenSach.DataSource = DauSach_BUS.SelectDauSachAll();
if (dt.Rows.Count == 0)
{
dgvSach.DataSource = Sach_BUS.SelectSachNull();
}
dgvSach.DataSource = dt;
}
