public class Product
    {
        [HiddenInput(DisplayValue = false)]
        public int ID { get; set; }
        [Required]
        public string Name { get; set; }
        [HiddenInput(DisplayValue = false)]
        [Required]
        [Range(0.01, double.MaxValue, ErrorMessage = "Введите пожалуйста верное значение!")]
        public decimal Price { get; set; }

        public byte[] ImageData { get; set; }
        [HiddenInput(DisplayValue = false)]
        public string ImageType { get; set; }
    }

[HttpGet]
        public ActionResult ProductOperation(Product prod)
        {
            OperationalMemory operational = reposytory.OperationalMemories.FirstOrDefault(c => c.ProductID == prod.ID);
            var model = new ProductOperationMemory()
            {
                Product = prod,
                OperationalMemory = operational
            };
            return View(model);
        }

        [HttpPost]
        public ActionResult ProductOperation(ProductOperationMemory model, HttpPostedFileBase image)
        {
            if (ModelState.IsValid)
            {
                if (image != null)
                {
                    model.Product.ImageType = image.ContentType;
                    model.Product.ImageData=new byte[image.ContentLength];
                    image.InputStream.Read(model.Product.ImageData, 0, image.ContentLength);
                }
                reposytory.SaveOperationMemory(model.OperationalMemory);
                reposytory.SaveProduct(model.Product);
                TempData["mesage"] = string.Format("Объект \"{0}\" успешно сохранен!", model.Product.Name);
                return View("AdminPage");
            }
            return View();
        }

@model Models.ProductOperationMemory

@{
    ViewBag.Title = "ProductOperation";
    Layout = "~/Views/Shared/_AdminLayout.cshtml";
}

@using (Html.BeginForm("ProductOperation","MainAdministrator",
    FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    @*<fieldset>*@
        <legend>Операционная память</legend>
        @Html.HiddenFor(p => p.Product.ID)

        <div>Наименование</div>
        <div>@Html.EditorFor(p=>p.Product.Name)</div>

        <div>Стоимость</div>
        <div>@Html.EditorFor(p=>p.Product.Price)</div>

        @Html.HiddenFor(p => p.OperationalMemory.ID)
        @Html.HiddenFor(p => p.OperationalMemory.ProductID)
        <div>Частота</div>
        <div>@Html.EditorFor(p=>p.OperationalMemory.Frequency)</div>

        <div>PC-индекс</div>
        <div>@Html.EditorFor(p=>p.OperationalMemory.PCIndex)</div>

        <div>Тайминги</div>
        <div>@Html.EditorFor(p=>p.OperationalMemory.Timing)</div>

        <div>Тип DDR</div>
        <div>@Html.EditorFor(p=>p.OperationalMemory.TipeDDR)</div>

        <div>Примечания</div>
        <div>@Html.EditorFor(p=>p.OperationalMemory.Note)</div>

        <div>Изображение</div>
        <div>
            @if (Model.Product.ImageData == null)
            {
                @:None
            }
            else
            {
                <img width="200" height="150" src="@Url.Action("GetImage","MainAdministrator", new {Model.Product.ID})"/>
            }
            <div>Загрузить изображение:
                <input type="file" name="Image"/>
            </div>
        </div>

        <p>
            <input type="submit" value="Сохранить"/>
        </p>
    @*</fieldset>*@
}

 public void SaveProduct(Product prod)
        {
            if (prod.ID == 0)
            {
                itemDB.Products.Add(prod);
            }
            else
            {
                Product dbProduct = itemDB.Products.Find(prod.ID);
                if (dbProduct != null)
                {
                    dbProduct.Name = prod.Name;
                    dbProduct.Price = prod.Price;
                    dbProduct.ImageData = prod.ImageData;
                    dbProduct.ImageType = prod.ImageType;
                }
            }
            itemDB.SaveChanges();
        }