Subject: FileSystemProgressEventArgs e.UserObject is null
Date: 2012-03-04 04:37:06
From: Jon Reis
Source: filesystemprogresseventargs-e-userobject-null
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Hello, so far I like the design of your FTP/FTPS components. They look well done.

I have a question about the UserObject in the callback Ftp.Progress callback. I'm calling the following code:



FileStream fs = new FileStream(tempFile, FileMode.OpenOrCreate);

MessageCollectionView mv= new MessageCollectionView();

_client.BeginDownloadFile(item.Text, fs, mv);



In the client callback, I'm calling:



case TransferState.Downloading:

  // Source file is being downloaded to the local disk.

  time = Environment.TickCount;

  if (time - _timeLastEvent >= 1000  && e.BytesPerSecond > 0)

  {

    _timeLastEvent = time;

    var mv = e.UserObject as MessageCollectionView;

    mv.DetectChanges();

  }



I'm expecting e.UserObject to contain my object that I passed into the BeginDownloadFile function, however; it is always null.

Am I doing something wrong here?



Thanks in advance.

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