GetLastWriteTimeUtc() public method

Returns the date and time, in coordinated universal time (UTC), that the specified file or directory was last written to.
is null. Client is not connected. The method was called after the client was disposed.
public GetLastWriteTimeUtc ( string path ) : DateTime
path string The file or directory for which to obtain write date and time information.
return DateTime
SftpClient Class Documentation
Example #1
0
        private void UploadSingleFile(ISftpFileUploader fileUploaderImplementation, string fileToUpload, string destinationPath, bool overWriteExistingFiles)
        {
            System.Diagnostics.Debug.WriteLine($"Will upload {fileToUpload}");

            // check if file can be read
            var fileAvailability = _fileAvailabilityChecker.CheckFileAvailability(fileToUpload);

            if (fileAvailability.FileAvailabilityResult != FileAvailabilityResult.IsReadable)
            {
                _logger.LogError($"File '{fileAvailability.FileName}' could not be read - {fileAvailability.Description}/{fileAvailability.FileAvailabilityResult}");
                return;
            }

            // Remove any trailing forward-slashes.
            if (destinationPath.EndsWith("/"))
            {
                destinationPath = destinationPath.Substring(0, destinationPath.Length - 1);
            }

            string sftpServerDestinationFilePath = destinationPath + @"/" + Path.GetFileName(fileToUpload);

            if (_sftpClient.Exists(sftpServerDestinationFilePath) && overWriteExistingFiles == false)
            {
                string fileNotUploadedMessage = ($"'{fileToUpload}' not uploaded - already exists in destination-dir '{destinationPath}'");
                _logger.LogInformation(fileNotUploadedMessage);
            }
            else if (_sftpClient.Exists(sftpServerDestinationFilePath) && overWriteExistingFiles == true)
            {
                // Exists, overwrite if size changed or newer.
                long existingFileSize = _sftpClient.GetAttributes(sftpServerDestinationFilePath).Size;
                long localFileSize    = new FileInfo(fileToUpload).Length;
                bool isDifferentSize  = existingFileSize != localFileSize;

                DateTime existingFileTimeStamp = _sftpClient.GetLastWriteTimeUtc(sftpServerDestinationFilePath);
                DateTime localFileTimeStamp    = File.GetLastWriteTimeUtc(fileToUpload);
                bool     localFileIsNewer      = localFileTimeStamp > existingFileTimeStamp;

                if (isDifferentSize || localFileIsNewer)
                {
                    fileUploaderImplementation.PerformFileUpload(fileToUpload, sftpServerDestinationFilePath, _sftpClient, _logger);
                    string fileUploadMessage = ($"Uploaded '{fileToUpload}' into destination-dir '{destinationPath}'");
                    _logger.LogInformation(fileUploadMessage);
                }
                else
                {
                    string fileNotUploadedMessage = ($"'{fileToUpload}' not uploaded - already exists in destination-dir '{destinationPath}'");
                    _logger.LogInformation(fileNotUploadedMessage);
                }
            }
            else
            {
                // All-new file, just upload it.
                fileUploaderImplementation.PerformFileUpload(fileToUpload, sftpServerDestinationFilePath, _sftpClient, _logger);
                string fileUploadMessage = ($"Uploaded '{fileToUpload}' into destination-dir '{destinationPath}'");
                _logger.LogInformation(fileUploadMessage);
            }
        }