C# SFTP upload files

Question

I am trying to upload files to a linux server but I am getting an error saying: \"Unable to connect to the remote server\". I dont know if my code is wrong or the

Answer 1

The best library/NuGet Package that I found was SSH.NET by Renci. Open up Nuget Package Manager and install this into your project.

The upload can be done with a stored file or a byte[] file.

---

Upload byte[] file

// you could pass the host, port, usr, and pass as parameters
public void FileUploadSFTP()
{
    var host = "whateverthehostis.com";
    var port = 22;
    var username = "username";
    var password = "passw0rd";
    
    // http://stackoverflow.com/questions/18757097/writing-data-into-csv-file/39535867#39535867
    byte[] csvFile = DownloadCSV(); // Function returns byte[] csv file

    using (var client = new SftpClient(host, port, username, password))
    {
        client.Connect();
        if (client.IsConnected)
        {
            Debug.WriteLine("I'm connected to the client");

            using (var ms = new MemoryStream(csvFile))
            {
                client.BufferSize = (uint)ms.Length; // bypass Payload error large files
                client.UploadFile(ms, GetListFileName());
            }
        }
        else
        {
            Debug.WriteLine("I couldn't connect");
        }
    }
}

---

Upload From a Stored File

This was the site that I used as a resource to get me started: http://blog.deltacode.be/2012/01/05/uploading-a-file-using-sftp-in-c-sharp/

It's written for uploading files.

// you could pass the host, port, usr, pass, and uploadFile as parameters
public void FileUploadSFTP()
{
    var host = "whateverthehostis.com";
    var port = 22;
    var username = "username";
    var password = "passw0rd";

    // path for file you want to upload
    var uploadFile = @"c:yourfilegoeshere.txt"; 

    using (var client = new SftpClient(host, port, username, password))
    {
        client.Connect();
        if (client.IsConnected)
        {
            Debug.WriteLine("I'm connected to the client");

            using (var fileStream = new FileStream(uploadFile, FileMode.Open))
            {
                
                client.BufferSize = 4 * 1024; // bypass Payload error large files
                client.UploadFile(fileStream, Path.GetFileName(uploadFile));
            }
        }
        else
        {
            Debug.WriteLine("I couldn't connect");
        }
    }
}

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Hopefully this is helpful for anyone trying to upload a file using SFTP in C#.