asp.net-mvc – ASP.NET MVC3 View模型不是null,但在发回Control

我有一个名为OrderFromCategory的控制器操作,它使用数据填充视图模型(在这种情况下,视图模型只是另一个视图模型类型的项列表).这将传递给强类型视图,该视图显示项目列表并允许用户更改每个项目的数量.在Post上,我的post控制器操作会返回模型对象,但列表中没有对象.我错过了接线的东西吗？不知所措,任何帮助将不胜感激！非常感谢！

另外,我的验证是否正确连线？在我得到模型数据持久之前无法测试！

这是代码：

视图模型：

public class MenuItemsModel
{
    public MenuItemsOrderModel()
    {
        items = new List<MenuItemOrderModel>();
    }

    public List<MenuItemOrderModel> items { get; set; }
}

public class MenuItemOrderModel
{
    public int ItemID { get; set; }

    [Display(Name = "Name")]
    public string ItemName { get; set; }

    [Display(Name = "Description")]
    public string Description { get; set; }

    [Display(Name = "Price")]
    [DataType(DataType.Currency)]
    public decimal Price { get; set; }

    [Display(Name = "Quantity")]
    public int Quantity { get; set; }

    public string Qualifier { get; set; }
    public int Minimum { get; set; }
}

控制器：

public ActionResult OrderFromCategory(string id)
    {
        ViewData["category"] = id;
        Models.MenuItemsModel model = new Models.MenuItemsModel();

        foreach (Models.MenuItem item in Models.MenuItemRepository.GetMenuItemsForCategory(id))
        {
            model.items.Add(new Models.MenuItemOrderModel()
            {
                ItemID = item.ItemID,Description = item.Description,ItemName = item.Name,Price = item.Price,Qualifier = item.PriceQualifier,Minimum = item.MinimumQuantity,Quantity = ((namespace.Models.Order)Session["order"]).GetItemQuantity(item.ItemID)
            });
        }

        return View(model);
    }

    [HttpPost]
    public ActionResult OrderFromCategory(string id,Models.MenuItemsModel model)
    {
        //check for user inputs in all items
        foreach (string inputKey in Request.Form.AllKeys)
        {
            Models.MenuItem item = Models.MenuItemService.GetMenuItem(int.Parse(inputKey));
            int minimum = item.MinimumQuantity;
            int quantity = string.IsNullOrEmpty(Request.Form[inputKey]) ? 0 : int.Parse(Request.Form[inputKey]);

            if(quantity != 0 && quantity < minimum)
            {
                ModelState.AddModelError(string.Format("Quantity",item.ItemID),string.Format("Minimum of {0} required for order",minimum));
            }

            if (!ModelState.IsValid)
            {
                return View(model);
            }

            Models.OrderService.UpdateItemInOrder((Models.Order)Session["order"],item.ItemID,quantity);
        }

        return RedirectToAction("PlaceOrder");
    }

视图：

@model namespace.Models.MenuItemsModel
@{
    ViewBag.Title = "Order from  " + ViewData["category"];
}

<h2>Order from @ViewData["category"] </h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>


@using (Html.BeginForm())
{
    @Html.ValidationSummary(true,"Order was unsuccessful. Please correct the errors and try again.")    
    <div>
        <fieldset>

        @foreach (namespace.Models.MenuItemOrderModel item in Model.items)
        {
            <div class="item_group">

              <div class = "item_name">
                @item.ItemName
              </div>
              <div class = "item_description">
                @item.Description
              </div>
              <div class = "item_price">
                $@item.Price /@item.Qualifier  (@item.Minimum miminum)
              </div> 
              <div class = "item_quantity">
                <div class="editor-label">
                    Quantity
                </div>
                <div class="editor-field">
                    @Html.TextBox(item.ItemID.ToString(),item.Quantity.ToString(),new { @class = "quantity_textbox",@type = "number"})
                    @Html.ValidationMessage("Quantity","*")
                </div>
              </div>

            </div>
        }

        <p>
            <input type="submit" value="Continue" />
        </p>

        </fieldset>
   </div>
}