public ActionResult Index(FileAttachment model)
        {
            ViewBag.ItemId = new SelectList(db.Items, "ItemId", "Title");

            if (!ModelState.IsValid || model.File == null)
            {
                model.Message = "Import unsuccessfully. Please try again.";
                //return RedirectToAction("Index");
                return View(model);
            }

            byte[] uploadedFile = new byte[model.File.InputStream.Length];
            model.File.InputStream.Read(uploadedFile, 0, uploadedFile.Length);

            var item = db.Items.Find(model.ItemId);
            item.Picture = uploadedFile;
            db.SaveChanges();
            model.Message = "Import completed successfully.";
            //return RedirectToAction("Index");
            return View(model);
            //return Content("Thanks for uploading the file");
        }
 //
 // GET: /FileAttachment/
 public ActionResult Index()
 {
     var model = new FileAttachment();
     ViewBag.ItemId = new SelectList(db.Items, "ItemId", "Title");
     return View(model);
 }