is it possible to automatically add timestamp to downloading files

Question

Hi,
I'm looking to add data and time at the end file name while downloaded.
is there a standard way or workaround to do this.

Thanks

Answer 1

If you are using single-file operations GetFile or PutFile you can specify target path as argument.

Unfortunately, there is no direct support for this in multi-file operations Upload or Download, but it can be done using the TransferProgressChanged event like this:

client.TransferProgressChanged += (s, e) =>
{
    if (e.TransferState == TransferProgressState.FileTransferred)
    {
        string extension = Path.GetExtension(e.TargetPath);
        string pathWithoutExtension = e.TargetPath.Substring(0, e.TargetPath.Length-extension.Length);
        string timestamp = e.SourceItem.LastWriteTime.GetValueOrDefault().ToString("-yyyyMMdd-HHmmss");
        string newPath = string.Format("{0}{1}{2}", pathWithoutExtension, timestamp, extension);

        Console.WriteLine("Moving: {0} -> {1}", e.TargetPath, newPath);

        if (e.Action == TransferAction.Downloading)
        {
            if (File.Exists(newPath))
                File.Delete(newPath);
            File.Move(e.TargetPath, newPath);
        }
        else if(e.Action == TransferAction.Uploading)
        {
            // This is only possible for SFTP, which supports multiple operations to be executed at once.
            // For FTP, files has to be renamed after the whole Upload operation is finished.
            if (client.FileExists(newPath))
                client.Delete(newPath, TraversalMode.NonRecursive);
            client.Rename(e.TargetPath, newPath);
        }
    }
};

If the above solution is not possible for any reason, you can do it in two steps.

1. Get list of all items. For download use client.GetItems() method. For upload use FileSet.GetLocalItems() method.
2. Iterate through all items and transfer them using single-file operation with appropriate name+timestamp argument.