private void Save()
        {
            using (var scope = new TransactionScope())
            {
                try
                {
                    if (listReceiptProducts.Count > 0)
                    {
                        double TongTien    = 0;
                        int    TongSoLuong = 0;
                        foreach (var prod in listReceiptProducts)
                        {
                            TongTien    += prod.ThanhTien;
                            TongSoLuong += prod.SoLuong;
                        }

                        string MaPhieu = null, strMaPhieu = "PX";
                        string MAX = (DBDataProvider.DB.kPhieuTraHangNCCs.Count() + 1).ToString();
                        for (int i = 1; i < (7 - MAX.Length); i++)
                        {
                            strMaPhieu += "0";
                        }
                        MaPhieu = strMaPhieu + MAX;
                        int IDNCC     = Int32.Parse(ccbNhaCungCap.Value.ToString());
                        int IDSoPhieu = 0;
                        if (ccbSoPhieu.Text != "")
                        {
                            IDSoPhieu = Int32.Parse(ccbSoPhieu.Value.ToString());
                        }

                        // insert kPhieuTraHangNCC
                        kPhieuTraHangNCC phieutra = new kPhieuTraHangNCC();
                        phieutra.MaPhieu      = MaPhieu;
                        phieutra.NhaCungCapID = IDNCC;
                        phieutra.SoPhieuTra   = IDSoPhieu;
                        phieutra.NgayTra      = Convert.ToDateTime(dateNgayTra.Date);
                        phieutra.NgayNhap     = DateTime.Now;
                        phieutra.NhanVienID   = Formats.IDUser();
                        phieutra.GhiChu       = memoGhiChu.Text;
                        phieutra.TongSoLuong  = TongSoLuong;
                        phieutra.TongTienHang = TongTien;
                        phieutra.ThanhToan    = ckGiamCongNo.Checked == true ? 0 : TongTien;
                        phieutra.STTDonHang   = DBDataProvider.STTPhieuTraHang_NCC(IDNCC);
                        phieutra.ConLai       = ckGiamCongNo.Checked == true ? TongTien : 0;
                        phieutra.HinhThucTT   = ckGiamCongNo.Checked == true ? 1 : 0;
                        DBDataProvider.DB.kPhieuTraHangNCCs.InsertOnSubmit(phieutra);
                        DBDataProvider.DB.SubmitChanges();
                        int IDPhieuTraHang = phieutra.IDPhieuTraHang;
                        foreach (var prod in listReceiptProducts)
                        {
                            // insert Chi tiet
                            kPhieuTraHangNCCChiTiet chitiet = new kPhieuTraHangNCCChiTiet();
                            chitiet.PhieuTraHangNCCID = IDPhieuTraHang;
                            chitiet.HangHoaID         = prod.IDHangHoa;
                            chitiet.GiaVon            = prod.GiaVon;
                            chitiet.SoLuong           = prod.SoLuong;
                            chitiet.ThanhTien         = prod.ThanhTien;
                            chitiet.TonKho            = prod.TonKho;
                            chitiet.TienTra           = prod.TienTra;
                            DBDataProvider.DB.kPhieuTraHangNCCChiTiets.InsertOnSubmit(chitiet);
                            //Cập nhật || trừ tồn kho
                            var TonKhoBanDau = DBDataProvider.DB.hhHangHoas.Where(x => x.IDHangHoa == prod.IDHangHoa).FirstOrDefault();
                            if (TonKhoBanDau != null)
                            {
                                TonKhoBanDau.TonKho -= prod.SoLuong;
                                #region ghi thẻ kho
                                kTheKho thekho = new kTheKho();
                                thekho.NgayNhap    = DateTime.Now;
                                thekho.DienGiai    = "Trả hàng NCC #" + MaPhieu;
                                thekho.Nhap        = 0;
                                thekho.GiaThoiDiem = prod.TienTra;
                                thekho.Xuat        = prod.SoLuong;
                                thekho.Ton         = prod.TonKho - prod.SoLuong;
                                thekho.HangHoaID   = TonKhoBanDau.IDHangHoa;
                                thekho.NhanVienID  = Formats.IDUser();
                                DBDataProvider.DB.kTheKhos.InsertOnSubmit(thekho);
                                #endregion
                            }
                        }
                        //update công nợ
                        khKhachHang Supplier = DBDataProvider.DB.khKhachHangs.Where(x => x.IDKhachHang == IDNCC).FirstOrDefault();
                        if (Supplier != null)
                        {
                            #region ghi nhật ký nhập kho để xem báo cáo

                            khNhatKyCongNo nhatky = new khNhatKyCongNo();
                            nhatky.NgayNhap    = DateTime.Now;
                            nhatky.DienGiai    = "Trả hàng NCC ";
                            nhatky.NoDau       = Supplier.CongNo;
                            nhatky.NhapHang    = 0;
                            nhatky.TraHang     = TongTien;
                            nhatky.NoCuoi      = Supplier.CongNo - (ckGiamCongNo.Checked == true ? TongTien : 0);
                            nhatky.ThanhToan   = 0;
                            nhatky.NhanVienID  = Formats.IDUser();
                            nhatky.SoPhieu     = MaPhieu;
                            nhatky.IDKhachHang = IDNCC;
                            DBDataProvider.DB.khNhatKyCongNos.InsertOnSubmit(nhatky);
                            DBDataProvider.DB.SubmitChanges();

                            Supplier.CongNo        -= ckGiamCongNo.Checked == true ? TongTien : 0;
                            Supplier.LanCuoiMuaHang = DateTime.Now;

                            Supplier.TienTraHang += TongTien;
                            #endregion
                            phieutra.CongNoCu = Supplier.CongNo;
                        }

                        DBDataProvider.DB.SubmitChanges();
                        scope.Complete();
                        Reset();
                        cbpInfoImport.JSProperties["cp_Reset"] = true;
                    }
                    else
                    {
                        throw new Exception("Danh sách hàng hóa trống !!");
                        ccbBarcode.Text  = "";
                        ccbBarcode.Value = "";
                        ccbBarcode.Focus();
                    }
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
        }