After update to API v3 Update won't work.

Hello. I use method to update file and it works fine. After I’ve updated library to API v3 and changed part of the code, it stopped working. I haven’t get any Exception but file on Google Drive hadn’t changed. Similar method with _service.Files.Create works fine.

public static File updateFile(DriveService _service, string _uploadFile, string _parent, string _fileId,      string Description)
    {
        if (System.IO.File.Exists(_uploadFile))
        {
            File body = new File();
            body.Name = System.IO.Path.GetFileName(_uploadFile);
            body.Description = Description;
            body.MimeType = GetMimeType(_uploadFile);
            body.Parents = new List<string> { _parent };

            byte[] byteArray = System.IO.File.ReadAllBytes(_uploadFile);
            System.IO.MemoryStream stream = new System.IO.MemoryStream(byteArray);
            try
            {
                FilesResource.UpdateMediaUpload request = _service.Files.Update(body, _fileId, stream, GetMimeType(_uploadFile));
                request.Upload();
                return request.ResponseBody;
            }
            catch (Exception)
            {
                return null;
                throw;
            }
        }
        else
        {
            return null;
        }
    }

[erickoledadevrel]

This appears to be working as intended. As per the documentation, request.Upload() returns an IUploadProgress which has en Exception field which contains the exception, instead of throwing it. In this case an exception is being thrown, because in Drive v3 Update() requests use patch semantics and can only contain writeable fields in the File body. In your case you are first (unnecessarily) fetching the existing File object, which contains read-only fields.

[giorgiolami]

@erickoledadevrel thanks a lot!!!