상속: System.Data.Linq.DataContext
        // Determines whether the timestamps in the file extend beyond user-defined thresholds.
        private static void ValidateFileTimestamps(string filePath, FileGroup fileGroup, SystemSettings systemSettings, FileInfoDataContext fileInfo)
        {
            DateTime now;
            double timeDifference;

            // Get the current time in XDA's time zone
            now = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, systemSettings.XDATimeZoneInfo);

            // Determine whether past timestamp validation is disabled
            if (systemSettings.MinTimeOffset > 0.0D)
            {
                // Get the total number of hours between the current time and the start time of the data in the file
                timeDifference = now.Subtract(fileGroup.DataStartTime).TotalHours;

                // Determine whether the number of hours exceeds the threshold
                if (timeDifference > systemSettings.MinTimeOffset)
                    throw new FileSkippedException($"Skipped file \"{filePath}\" because data start time '{fileGroup.DataStartTime}' is too old.");
            }

            // Determine whether future timestamp validation is disabled
            if (systemSettings.MaxTimeOffset > 0.0D)
            {
                // Get the total number of hours between the current time and the end time of the data in the file
                timeDifference = fileGroup.DataEndTime.Subtract(now).TotalHours;

                // Determine whether the number of hours exceeds the threshold
                if (timeDifference > systemSettings.MaxTimeOffset)
                    throw new FileSkippedException($"Skipped file \"{filePath}\" because data end time '{fileGroup.DataEndTime}' is too far in the future.");
            }
        }
            /// <summary>
            /// Gets the file group containing information about the file on
            /// the given file path, as well as the files related to it.
            /// </summary>
            /// <param name="dataContext">The data context used for database lookups.</param>
            /// <param name="xdaTimeZone">The time zone used by openXDA.</param>
            /// <returns></returns>
            public FileGroup GetFileGroup(FileInfoDataContext dataContext, TimeZoneInfo xdaTimeZone)
            {
                FileInfo fileInfo;
                FileGroup fileGroup;
                DataFile dataFile;

                fileGroup = new FileGroup();
                fileGroup.ProcessingStartTime = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, xdaTimeZone);

                foreach (string file in GSF.IO.FilePath.GetFileList($"{m_filePathWithoutExtension}.*"))
                {
                    fileInfo = new FileInfo(file);

                    dataFile = new DataFile();
                    dataFile.FilePath = file;
                    dataFile.FilePathHash = file.GetHashCode();
                    dataFile.FileSize = fileInfo.Length;
                    dataFile.CreationTime = TimeZoneInfo.ConvertTimeFromUtc(fileInfo.CreationTimeUtc, xdaTimeZone);
                    dataFile.LastWriteTime = TimeZoneInfo.ConvertTimeFromUtc(fileInfo.LastWriteTimeUtc, xdaTimeZone);
                    dataFile.LastAccessTime = TimeZoneInfo.ConvertTimeFromUtc(fileInfo.LastAccessTimeUtc, xdaTimeZone);
                    dataFile.FileGroup = fileGroup;
                }

                dataContext.FileGroups.InsertOnSubmit(fileGroup);
                dataContext.SubmitChanges();

                return fileGroup;
            }
        // Determines the start time and end time of the given data and sets the properties on the given file group.
        private static void SetDataTimeRange(MeterDataSet meterDataSet, FileInfoDataContext fileInfo)
        {
            DateTime dataStartTime;
            DateTime dataEndTime;

            dataStartTime = meterDataSet.DataSeries
                .Concat(meterDataSet.Digitals)
                .Where(dataSeries => dataSeries.DataPoints.Any())
                .Select(dataSeries => dataSeries.DataPoints.First().Time)
                .DefaultIfEmpty()
                .Min();

            dataEndTime = meterDataSet.DataSeries
                .Concat(meterDataSet.Digitals)
                .Where(dataSeries => dataSeries.DataPoints.Any())
                .Select(dataSeries => dataSeries.DataPoints.Last().Time)
                .DefaultIfEmpty()
                .Max();

            if (dataStartTime != default(DateTime))
                meterDataSet.FileGroup.DataStartTime = dataStartTime;

            if (dataEndTime != default(DateTime))
                meterDataSet.FileGroup.DataEndTime = dataEndTime;

            fileInfo.SubmitChanges();
        }
 // Loads a file group containing information about the file on the given
 // file path, as well as the files related to it, into the database.
 private FileGroup LoadFileGroup(FileInfoDataContext dataContext, int fileGroupID)
 {
     return dataContext.FileGroups.FirstOrDefault(fileGroup => fileGroup.ID == fileGroupID);
 }