Topic "c# - Copy only new files from Zip"

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[View user's profile]

Joined: 2016-06-27
Posts: 1
Location: netherlands

So i have a zip file on my SFTP server. In this zip file there are files.

And i have a zip file on my pc.

What i want is that when i push a button in my C# application, the zip file on my pc will be updated. So lets say if the zip file on the sftp server has a new file in it. The ftp function will only update the zip file on the pc with that file.

Currently it always overwrite the zip file.

Is this possible?

thanks , Thomas



SessionOptions sessionOptions = new SessionOptions
                //i have information here.               
                    Protocol =
                    HostName = "",
                    UserName = "",
                    Password = "",
                    SshHostKeyFingerprint = "",

                using (Session session = new Session())
                    session.FileTransferProgress += SessionFileTransferProgress;
                    TransferOptions transferOptions = new TransferOptions();
                    transferOptions.TransferMode = TransferMode.Binary;
                    transferOptions.OverwriteMode = OverwriteMode.Overwrite;
                    TransferOperationResult transferResult;
                    transferResult = session.GetFiles("[file on server]","[file on pc]", false, new TransferOptions { FilePermissions =  null, PreserveTimestamp = false });
[View user's profile]
Site Admin
Joined: 2002-12-10
Posts: 25748
Location: Prague, Czechia
All you can do is to download the file to a local temporary folder, compare the contents and overwrite, if there's a change.

But in the end, it's the same as comparing the timestamp of the ZIP files and overwrite the local ZIP file whenever the remote file is newer.

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