Download / upload files to synology NAS via VB.NET

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Hi. I have a Synology NAS for file storage and I want to use VB.net for automating things related to downloading and uploading files to and from the NAS server. I wish anyone could point me to a relevant resource as I have been trying hard to find a solution to this problem but can't seem to get any luck. Looking forward to your help.

What I have tried:

Tried using WebClient in .NET but can't find a solution getting it right as it seems IT only deals with an actual directory on my current file server but not on a NAS Server.

Posted 30-Jun-22 16:34pm

Sys Dev

Updated 30-Jun-22 19:00pm

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OriginalGriff · Accepted Answer · 2022-06-30T19:00:00

Have you tried mapping the NAS folders to a virtual drive in Windows? It then appears as a "normal" drive letter to all apps and can be accessed as such.

I do that, but since my NASes are SMB1, Windows can be finicky about reconnecting them, so I wrote an app to remake the connections. (Even then, I have to restart Windows sometimes before it'll work - Windows really doesn't want you yo use SMB1 any more.)

The code is C#, but it's pretty obvious - it uses the "net use" windows cmd app to remove and remake a connection as this was the most reliable way I found (previously working WIN32 calls failed in Win10 and Win11 when SMB1 support was depreciated):

C#

/// <summary>
/// Tries to establish a connection to a network drive
/// </summary>
/// <param name="drive"></param>
/// <param name="path"></param>
private static void Connect(string drive, string path)
    {
    for (int attempts = 3; attempts > 0; attempts--)
        {
        if (attempts != 3) Thread.Sleep(5000);
        Process process = new Process();
        process.StartInfo.RedirectStandardOutput = true;
        process.StartInfo.UseShellExecute = false;
        process.StartInfo.CreateNoWindow = true;
        process.StartInfo.FileName = "net";
        process.StartInfo.Arguments = $"use {drive} /delete";
        process.Start();
        process.WaitForExit();

        process = new Process();
        process.StartInfo.RedirectStandardOutput = true;
        process.StartInfo.UseShellExecute = false;
        process.StartInfo.CreateNoWindow = true;
        process.StartInfo.FileName = "net";
        process.StartInfo.Arguments = $"use {drive} {path}";
        process.Start();
        process.WaitForExit();
        DriveInfo di = new DriveInfo(drive.Substring(0, 1));
        if (di.IsReady) return;
        }
    Storage.WriteLog($"Unable to connect {drive} to \"{path}\" after three attempts");
    }