public bool SaveInterviewResult()
        {
            bool result = true;

            if (ImportObjects.ContainsKey(UserID))
            {
                using (var context = new VnrHrmDataContext())
                {
                    IUnitOfWork unitOfWork = new UnitOfWork(context);
                    var dtImportObject = ImportObjects[UserID];
                    var dtInterview = new DataTable("Rec_Interview");
                    dtInterview.Columns.Add("ID", typeof(Guid));
                    dtInterview.Columns.Add("CandidateID", typeof(Guid));
                    dtInterview.Columns.Add("JobVacancyID", typeof(Guid));
                    dtInterview.Columns.Add("LanguageID", typeof(Guid));
                    dtInterview.Columns.Add("GroupConditionID", typeof(Guid));
                    dtInterview.Columns.Add("RecruitmentHistoryID", typeof(Guid));
                    dtInterview.Columns.Add("Score", typeof(double));
                    dtInterview.Columns.Add("Score1", typeof(double));
                    dtInterview.Columns.Add("Score2", typeof(double));
                    dtInterview.Columns.Add("ResultInterview", typeof(string));
                    dtInterview.Columns.Add("LevelInterview", typeof(int));

                    var dtCandidate = new DataTable("Rec_Candidate");
                    dtCandidate.Columns.Add("ID", typeof(Guid));
                    dtCandidate.Columns.Add("Status", typeof(string));

                    var dtHisstorry = new DataTable("Rec_RecruitmentHistory");
                    dtHisstorry.Columns.Add("ID", typeof(Guid));
                    dtHisstorry.Columns.Add("Status", typeof(string));

                    foreach (DataRow importRow in dtImportObject.Rows)
                    {
                        var candidateStatus = EnumDropDown.CandidateStatus.E_PASS;
                        var candidateID = importRow["CandidateID"];
                        object groupResult = null;

                        if (!importRow.IsNull(FieldMappings["GroupResult1"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult1"]];
                            DataRow interviewRow1 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow1);

                            interviewRow1.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID1"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow1.SetField("ID", interviewID);
                                    interviewRow1.AcceptChanges();//update mode
                                }
                            }

                            interviewRow1.SetField("CandidateID", candidateID);
                            interviewRow1.SetField("GroupConditionID", importRow["GroupConditionID1"]);
                            interviewRow1.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow1.SetField("Score", importRow[FieldMappings["Group1Score1"]]);
                            interviewRow1.SetField("Score1", importRow[FieldMappings["Group1Score2"]]);
                            interviewRow1.SetField("Score2", importRow[FieldMappings["Group1Score3"]]);
                            interviewRow1.SetField("ResultInterview", groupResult);
                            interviewRow1.SetField("LevelInterview", 1);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow1.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow1.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (!importRow.IsNull(FieldMappings["GroupResult2"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult2"]];
                            DataRow interviewRow2 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow2);

                            interviewRow2.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID2"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow2.SetField("ID", interviewID);
                                    interviewRow2.AcceptChanges();//update mode
                                }
                            }

                            interviewRow2.SetField("CandidateID", candidateID);
                            interviewRow2.SetField("GroupConditionID", importRow["GroupConditionID2"]);
                            interviewRow2.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow2.SetField("Score", importRow[FieldMappings["Group2Score1"]]);
                            interviewRow2.SetField("Score1", importRow[FieldMappings["Group2Score2"]]);
                            interviewRow2.SetField("Score2", importRow[FieldMappings["Group2Score3"]]);
                            interviewRow2.SetField("ResultInterview", groupResult);
                            interviewRow2.SetField("LevelInterview", 2);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow2.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow2.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (!importRow.IsNull(FieldMappings["GroupResult3"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult3"]];
                            DataRow interviewRow3 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow3);

                            interviewRow3.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID3"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow3.SetField("ID", interviewID);
                                    interviewRow3.AcceptChanges();//update mode
                                }
                            }

                            interviewRow3.SetField("CandidateID", candidateID);
                            interviewRow3.SetField("GroupConditionID", importRow["GroupConditionID3"]);
                            interviewRow3.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow3.SetField("Score", importRow[FieldMappings["Group3Score1"]]);
                            interviewRow3.SetField("Score1", importRow[FieldMappings["Group3Score2"]]);
                            interviewRow3.SetField("Score2", importRow[FieldMappings["Group3Score3"]]);
                            interviewRow3.SetField("ResultInterview", groupResult);
                            interviewRow3.SetField("LevelInterview", 3);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow3.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow3.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (!importRow.IsNull(FieldMappings["GroupResult4"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult4"]];
                            DataRow interviewRow4 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow4);

                            interviewRow4.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID4"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow4.SetField("ID", interviewID);
                                    interviewRow4.AcceptChanges();//update mode
                                }
                            }

                            interviewRow4.SetField("CandidateID", candidateID);
                            interviewRow4.SetField("GroupConditionID", importRow["GroupConditionID4"]);
                            interviewRow4.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow4.SetField("Score", importRow[FieldMappings["Group4Score1"]]);
                            interviewRow4.SetField("Score1", importRow[FieldMappings["Group4Score2"]]);
                            interviewRow4.SetField("Score2", importRow[FieldMappings["Group4Score3"]]);
                            interviewRow4.SetField("ResultInterview", groupResult);
                            interviewRow4.SetField("LevelInterview", 4);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow4.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow4.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (!importRow.IsNull(FieldMappings["GroupResult5"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult5"]];
                            DataRow interviewRow5 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow5);

                            interviewRow5.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID5"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow5.SetField("ID", interviewID);
                                    interviewRow5.AcceptChanges();//update mode
                                }
                            }

                            interviewRow5.SetField("CandidateID", candidateID);
                            interviewRow5.SetField("GroupConditionID", importRow["GroupConditionID5"]);
                            interviewRow5.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow5.SetField("Score", importRow[FieldMappings["Group5Score1"]]);
                            interviewRow5.SetField("Score1", importRow[FieldMappings["Group5Score2"]]);
                            interviewRow5.SetField("Score2", importRow[FieldMappings["Group5Score3"]]);
                            interviewRow5.SetField("ResultInterview", groupResult);
                            interviewRow5.SetField("LevelInterview", 5);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow5.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow5.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (!importRow.IsNull(FieldMappings["GroupResult6"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult6"]];
                            DataRow interviewRow6 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow6);

                            interviewRow6.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID6"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow6.SetField("ID", interviewID);
                                    interviewRow6.AcceptChanges();//update mode
                                }
                            }

                            interviewRow6.SetField("CandidateID", candidateID);
                            interviewRow6.SetField("GroupConditionID", importRow["GroupConditionID6"]);
                            interviewRow6.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow6.SetField("Score", importRow[FieldMappings["Group6Score1"]]);
                            interviewRow6.SetField("Score1", importRow[FieldMappings["Group6Score2"]]);
                            interviewRow6.SetField("Score2", importRow[FieldMappings["Group6Score3"]]);
                            interviewRow6.SetField("ResultInterview", groupResult);
                            interviewRow6.SetField("LevelInterview", 6);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow6.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow6.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (!importRow.IsNull(FieldMappings["GroupResult7"]))
                        {
                            groupResult = importRow[FieldMappings["GroupResult7"]];
                            DataRow interviewRow7 = dtInterview.NewRow();
                            dtInterview.Rows.Add(interviewRow7);

                            interviewRow7.SetField("ID", Guid.NewGuid());
                            var interviewID = importRow["InterviewID7"];

                            if (interviewID != null && interviewID.IsTypeOf(typeof(Guid)))
                            {
                                if (interviewID.GetString() != Guid.Empty.ToString())
                                {
                                    interviewRow7.SetField("ID", interviewID);
                                    interviewRow7.AcceptChanges();//update mode
                                }
                            }

                            interviewRow7.SetField("CandidateID", candidateID);
                            interviewRow7.SetField("GroupConditionID", importRow["GroupConditionID7"]);
                            interviewRow7.SetField("RecruitmentHistoryID", importRow["RecruitmentHistoryID"]);
                            interviewRow7.SetField("Score", importRow[FieldMappings["Group7Score1"]]);
                            interviewRow7.SetField("Score1", importRow[FieldMappings["Group7Score2"]]);
                            interviewRow7.SetField("Score2", importRow[FieldMappings["Group7Score3"]]);
                            interviewRow7.SetField("ResultInterview", groupResult);
                            interviewRow7.SetField("LevelInterview", 7);

                            if (!importRow.IsNull("JobVacancyID"))
                            {
                                interviewRow7.SetField("JobVacancyID", importRow["JobVacancyID"]);
                            }

                            if (!importRow.IsNull("LanguageID"))
                            {
                                interviewRow7.SetField("LanguageID", importRow["LanguageID"]);
                            }

                            if (groupResult.GetString() == EnumDropDown.CandidateStatus.E_FAIL.ToString())
                            {
                                candidateStatus = EnumDropDown.CandidateStatus.E_FAIL;
                            }
                        }

                        if (groupResult != null)
                        {
                            DataRow candidateRow = dtCandidate.NewRow();
                            dtCandidate.Rows.Add(candidateRow);
                            candidateRow.AcceptChanges();//Chuyển qua update
                            candidateRow.SetField("ID", candidateID);
                            candidateRow.SetField("Status", candidateStatus.ToString());
                            var historyID = importRow["RecruitmentHistoryID"];

                            if (historyID != null && historyID.IsTypeOf(typeof(Guid)))
                            {
                                if (historyID.GetString() != Guid.Empty.ToString())
                                {
                                    DataRow hisstorryRow = dtHisstorry.NewRow();
                                    dtHisstorry.Rows.Add(hisstorryRow);
                                    hisstorryRow.AcceptChanges();//Chuyển qua update
                                    hisstorryRow.SetField("ID", historyID);
                                    hisstorryRow.SetField("Status", candidateStatus.ToString());
                                }
                            }
                        }
                    }

                    using (DbCommander commander = new DbCommander(context.Database.Connection))
                    {
                        var transaction = commander.BeginTransaction();

                        try
                        {
                            var resultCount = commander.ExecuteBatch(transaction, dtInterview);
                            resultCount = commander.UpdateTable(transaction, dtCandidate);
                            resultCount = commander.UpdateTable(transaction, dtHisstorry);
                            transaction.Commit();
                        }
                        catch (Exception)
                        {
                            result = false;
                            transaction.Rollback();
                            throw;
                        }
                    }
                }
            }

            if (result)
            {
                if (ImportObjects.ContainsKey(UserID))
                {
                    ImportObjects[UserID] = null;
                    ImportObjects.Remove(UserID);
                }

                if (InvalidObjects.ContainsKey(UserID))
                {
                    InvalidObjects[UserID] = null;
                    InvalidObjects.Remove(UserID);
                }
            }

            return result;
        }