public static int DemSoLuongMaNLCoTrongCTHD(int maHD)
 {
     return(CTHDXuatDAO.DemSoLuongMaNLCoTrongCTHD(maHD));
 }
 public static int LayMaHDXuatTrongCTHDXuat(int maHD)
 {
     return(CTHDXuatDAO.LayMaHDXuatTrongCTHDXuat(maHD));
 }
 public static string LayMaNLTrongCTHDXuat(int maHD)
 {
     return(CTHDXuatDAO.LayMaNLTrongCTHDXuat(maHD));
 }
 public static bool XoaCTHDXuat(int maHDNhap, string maNL)
 {
     return(CTHDXuatDAO.XoaCTHDXuat(maHDNhap, maNL));
 }
 public static int LaySoLuongHienTai(int maHD, string maNL)
 {
     return(CTHDXuatDAO.LaySoLuongHienTai(maHD, maNL));
 }
 public static bool CapNhatCTHDXuat(CTHDXuatDTO cthd)
 {
     return(CTHDXuatDAO.CapNhatCTHDXuat(cthd));
 }
 public static bool ThemCTHDHDXuat(CTHDXuatDTO cthd)
 {
     return(CTHDXuatDAO.ThemCTHDHDXuat(cthd));
 }
 public static bool CapNhatSoLuong(int soLuong, int maHD, string maNL)
 {
     return(CTHDXuatDAO.CapNhatSoLuong(soLuong, maHD, maNL));
 }
 // Kiểm tra MaNL
 public static bool KiemTraMaNLTonTai(int maHD, string maNL)
 {
     return(CTHDXuatDAO.KiemTraMaNLTonTai(maHD, maNL));
 }
 public static DataTable LayDSCTHDXuat(int maHD)
 {
     return(CTHDXuatDAO.LayDSCTHDXuat(maHD));
 }