private void DoExport(byte[] bytes)
    {
        try
        {
            var fileName = string.Format("{0}.txt", DateTime.Now.ToString("yyyy.MM.dd_HH.mm.ss"));

            Response.ContentType = "application/octet-stream";
            Response.AddHeader("Content-Disposition", "attachment; filename="+fileName);
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();
        }
        catch { }
    }