c# transfer files in parallel :: Support Forum

Komatozzz
Joined:: 2020-08-26
Posts:: 1
Location:: Rus

c# transfer files in parallel

2020-08-26 10:20

Hello ewary one.
I have a problem with transfer files in parallel. When i do that - this look all ok, but indeed nope. If i start one task - File's transfer worked OK, but if i try do more then 1 session in parallel - session.FileTransferProgress in all Task return 100%, but File's loads in not all session in fact. What wrong i do?
PS Without parallel - all works fine.

await Task.Run(() => Parallel.ForEach(storeList, store =>
    {
        if (store.CheckBox == true)
        {
            parallel_options.CancellationToken.ThrowIfCancellationRequested();
 
            using (Session session = new Session())
            {
                options.HostName = store.IpForFiles;
                session.Timeout = TimeSpan.FromSeconds(10);
                session.FileTransferProgress += SessionFileTransferProgress;
                session.Open(options);
                Console.Write("\n" + store.Num + " START!");
                try
                {
                    foreach (var path in FilesList)
                    {
                        bool fileExists = session.FileExists("test_for_upload/");
                        if (fileExists == true)
                        {
                            var transferResult = session.PutFiles(path.PathFile, remoutePath);
                            Console.Write("\n" + store.Num + " EXISTS");
                        }
                        else
                        {
                            session.CreateDirectory("test_for_upload/");
                            var transferResult = session.PutFiles(path.PathFile, remoutePath);
                            Console.Write("\n" + store.Num + " CREATER");
                        }
                    }
                    Console.Write("\n" + store.Num + " FINISH!");
                    session.Close();
                }
                catch (Exception err)
                {
                    MessageBox.Show(err.Message);
                }
                finally
                {
 
                }
 
            }
        }
        else
        {
 
        }
 
    }));

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,468
Location:: Prague, Czechia

Re: c# transfer files in parallel

2020-08-26

Show us your SessionFileTransferProgress, and add some logging to it. And show us an overall console output of your code.

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Guest

2020-08-26 14:10

Hi, Martin!
Thanks for the help, I took a closer look at the log file from SessionLogPath and found the problem.
Although I'm in the line options.HostName = store.IpForFiles; I set the host for the connection - it happens on a different ip.
Solved the problem with this

lock (session.SessionLogPath)
{
    options.HostName = store.IpForFiles;
    session.Open (options);
}

Now everything works out correctly.

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c# transfer files in parallel

c# transfer files in parallel

Re: c# transfer files in parallel

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