upload chunked file in ftp using c# code example

Example: upload chunked file in ftp using c#

System.IO.FileInfo _FileInfo = new System.IO.FileInfo(_FileName);

    // Create FtpWebRequest object from the Uri provided
    System.Net.FtpWebRequest _FtpWebRequest = (System.Net.FtpWebRequest)System.Net.FtpWebRequest.Create(new Uri(_UploadPath));

    // Provide the WebPermission Credintials
    _FtpWebRequest.Credentials = new System.Net.NetworkCredential(_FTPUser, _FTPPass);

    // By default KeepAlive is true, where the control connection is not closed
    // after a command is executed.
    _FtpWebRequest.KeepAlive = false;

    // set timeout for 20 seconds
    _FtpWebRequest.Timeout = 20000;

    // Specify the command to be executed.
    _FtpWebRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile;

    // Specify the data transfer type.
    _FtpWebRequest.UseBinary = true;

    // Notify the server about the size of the uploaded file
    _FtpWebRequest.ContentLength = _FileInfo.Length;

    // The buffer size is set to 2kb
    int buffLength = 2048;
    byte[] buff = new byte[buffLength];

    // Opens a file stream (System.IO.FileStream) to read the file to be uploaded
    System.IO.FileStream _FileStream = _FileInfo.OpenRead();

    try
    {
        // Stream to which the file to be upload is written
        System.IO.Stream _Stream = _FtpWebRequest.GetRequestStream();

        // Read from the file stream 2kb at a time
        int contentLen = _FileStream.Read(buff, 0, buffLength);

        // Till Stream content ends
        while (contentLen != 0)
        {
            // Write Content from the file stream to the FTP Upload Stream
            _Stream.Write(buff, 0, contentLen);
            contentLen = _FileStream.Read(buff, 0, buffLength);
        }

        // Close the file stream and the Request Stream
        _Stream.Close();
        _Stream.Dispose();
        _FileStream.Close();
        _FileStream.Dispose();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message, "Upload Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }