Automatically download files in FTP server

Question

I don't have any knowledge about C# but I need to create an FTP server that automatically download a list of files (one by one, from the last to the first), so I downloaded some source codes of FTP servers and the most functional I found have a little problem, my task is to get a server that download files automatically, but the code I get open an window to select where to save the file.

How can i change it to download the files automatically?

(If possible, explain throughly how your code work, it will help me to better understand and learn C#)

private void ServerFileListView_DockChanged(object sender, EventArgs e)
{
    foreach (ListViewItem item in ServerFileListView.Items)
    {
      item.Selected = true;
    }

    byte[] file;

    Server.Download(MachineInfo.GetJustIP(), ServerFileListView.SelectedItems[0].SubItems[2].Text, out file);

    SaveFileDialog save = new SaveFileDialog();
    save.Title = "It saves the downloaded file.";
    save.SupportMultiDottedExtensions = false;
    save.Filter = "*.png|*.png";
    save.FileName = ServerFileListView.SelectedItems[0].SubItems[2].Text;
    if (save.ShowDialog() != System.Windows.Forms.DialogResult.Cancel)
    {
        System.IO.File.WriteAllBytes(save.FileName, file);
        MessageBox.Show(ServerFileListView.SelectedItems[0].SubItems[2].Text +" has been downloaded.", "FTP File Sharing", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
    save.Dispose();
}

If you want more details ask in the comments.

(Sorry for bad speech, i'm not fluently in english)

WindyHen WindyHen · Accepted Answer · 2016-02-09T12:55:50

You need to remove the SaveFileDialog() it is meant to save file interactively.

Get the list of the file and put in array
and loop (foreach) the array to run the download method
better yet, run the method in a separate thread or async, so it will not block the main thread.

Pseudo:

{run in thread

    if(ftp is connected)
    {
       connect;
       string listToDownload[] = getListFileFromServer;
        foreach (var item from listToDownload)
         {file = getFileFromServer;
          saveToDisk(file);
          }
    }
}

Automatically download files in FTP server

1 Answers