public static string uploadPhoto(HttpPostedFile file, string folder)
    {
        string path = string.Empty;
        string pic = string.Empty;

        if (file != null)
        {
            pic = Path.GetFileName(file.FileName);
            path = Path.Combine(HttpContext.Current.Server.MapPath(folder), pic);
            file.SaveAs(path);

            using (MemoryStream ms = new MemoryStream())
            {
                file.InputStream.CopyTo(ms);
                byte[] array = ms.GetBuffer();
            }
        }

        return pic;
    }

string pic = string.Empty;
            string folder = "~/Content/imagenes";


            if (view.imageFile != null)
            {
                pic = FilesHelpers.uploadPhoto(view.imageFile, folder);
                pic = string.Format("{0}/{1}", folder, pic);
            }

            var factura = toFactura(view);
            factura.foto = pic;

            db.factura.Add(factura);
            db.SaveChanges();

            return RedirectToAction("Index");

        }

        ViewBag.fichaCamion = new SelectList(db.camion, "id", "camion1", view.fichaCamion);
        ViewBag.cliente = new SelectList(db.cliente, "id", "compania", view.cliente1);
        return View(view);