public ActionResult Index(HttpPostedFileBase csvFile) { if (ModelState.IsValid) { if (csvFile != null) { using (var iRepo = new ImportRepository()) { iRepo.ImportFileData(csvFile.InputStream, csvFile.ContentLength); ViewBag.ImportSuccess = true; return(View()); } } else { ModelState.AddModelError("", "PDW file is required to upload new data."); } } return(View()); }