Upload file to FTP using C#

Question

I try upload a file to an FTP-server with C#. The file is uploaded but with zero bytes.

private void button2_Click(object sender, EventArgs e) {     var dirPath = @"C:/Documents and Settings/sander.GD/Bureaublad/test/";      ftp ftpClient = new ftp("ftp://example.com/", "username", "password");      string[] files = Directory.GetFiles(dirPath,"*.*");      var uploadPath = "/httpdocs/album";      foreach (string file in files)     {         ftpClient.createDirectory("/test");          ftpClient.upload(uploadPath + "/" + Path.GetFileName(file), file);     }      if (string.IsNullOrEmpty(txtnaam.Text))     {         MessageBox.Show("Gelieve uw naam in te geven !");     } } 

Answer 1

The existing answers are valid, but why re-invent the wheel and bother with lower level WebRequest types while WebClient already implements FTP uploading neatly:

using (var client = new WebClient()) {     client.Credentials = new NetworkCredential(ftpUsername, ftpPassword);     client.UploadFile("ftp://host/path.zip", WebRequestMethods.Ftp.UploadFile, localFile); } 

Answer 2

Easiest way

The most trivial way to upload a file to an FTP server using .NET framework is using WebClient.UploadFile method:

WebClient client = new WebClient(); client.Credentials = new NetworkCredential("username", "password"); client.UploadFile(     "ftp://ftp.example.com/remote/path/file.zip", @"C:\local\path\file.zip"); 

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Advanced options

If you need a greater control, that WebClient does not offer (like TLS/SSL encryption, ascii/text transfer mode, active mode, transfer resuming, progress monitoring, etc), use FtpWebRequest. Easy way is to just copy a FileStream to an FTP stream using Stream.CopyTo:

FtpWebRequest request =     (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip"); request.Credentials = new NetworkCredential("username", "password"); request.Method = WebRequestMethods.Ftp.UploadFile;    using (Stream fileStream = File.OpenRead(@"C:\local\path\file.zip")) using (Stream ftpStream = request.GetRequestStream()) {     fileStream.CopyTo(ftpStream); } 

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Progress monitoring

If you need to monitor an upload progress, you have to copy the contents by chunks yourself:

FtpWebRequest request =     (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip"); request.Credentials = new NetworkCredential("username", "password"); request.Method = WebRequestMethods.Ftp.UploadFile;    using (Stream fileStream = File.OpenRead(@"C:\local\path\file.zip")) using (Stream ftpStream = request.GetRequestStream()) {     byte[] buffer = new byte[10240];     int read;     while ((read = fileStream.Read(buffer, 0, buffer.Length)) > 0)     {         ftpStream.Write(buffer, 0, read);         Console.WriteLine("Uploaded {0} bytes", fileStream.Position);     }  } 

For GUI progress (WinForms ProgressBar), see C# example at:
How can we show progress bar for upload with FtpWebRequest

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Uploading folder

If you want to upload all files from a folder, see
Upload directory of files to FTP server using WebClient.

For a recursive upload, see
Recursive upload to FTP server in C#