public static bool ThemSPDL(SanPhamDL_DTO sanpham)
 {
     return(SanPhamDL_DAL.ThemSanPhamDL(sanpham));
 }
 public static bool XoaSPDL(SanPhamDL_DTO sanpham)
 {
     return(SanPhamDL_DAL.XoaSPDL(sanpham));
 }
 public static List <SanPhamDL_DTO> LoadSanPhamDL()
 {
     return(SanPhamDL_DAL.LoadSanPhamDL());
 }