Method GetFormatFromFile

src/OLE/RevitFileInfo.cs:85–117

(string filePath)

        #region Methods

        public static int GetFormatFromFile(string filePath)
        {
            if (string.IsNullOrWhiteSpace(filePath) || !File.Exists(filePath))
                throw new ArgumentException("Please supply a valid path to a Revit document", nameof(filePath));

            try
            {
                var basicInfo = OleDataReader.GetRawBytes(filePath, RevitFileMap.OleStreams.BASIC_FILE_INFO);
                var properties = GetProperties(basicInfo);
                var formatFromBasicInfo = properties.GetFormat();
                if (formatFromBasicInfo > 0)
                    return formatFromBasicInfo;
            }
            catch
            {
                // TODO ad logging
                // Trying to read
            }

            try
            {
                var partAtom = PartAtom.GetFromFile(filePath);
                var formatFromPartAtom = partAtom?.Link?.Files?.FirstOrDefault()?.ProductVersion;
                if (formatFromPartAtom != null)
                    return formatFromPartAtom.GetValueOrDefault();
            }
            catch (Exception ex)
            {
                throw new InvalidDataException($"Couldn't read format information from the followin file: '{filePath}'", ex);
            }

            return -1;
        }

        /// <summary>
        /// Gets a <see cref="RevitFileInfo" /> instance from the given file path.