Question

我是MVC.Net和razorviews的新手。我有一个包含卡片列表的模型。我想在我的视图中的下拉框中显示此列表。但我不被允许。从一个例子中，我发现了这个代码并尝试了一下：

列表的类：

public class CardType
{
    public CardType(string cardTypeName)
    {
        this.CardTypeName = cardTypeName;
    }

    public string CardTypeName { get; set; }
}

型号：

public class MyCardsViewModel
{
    public IEnumerable<PaymentCard> PaymentCards { get; set; }
    public AddPaymentcard PaymentCardInformation { get; set; }
}

public class AddPaymentcard
{
   public string CardTypeName { get; set; }

    public IEnumerable<SelectListItem> CardTypeList
    {
        get
        {
        return _cardTypes.Select(x => new SelectListItem {Value = x.CardTypeName, Text = x.CardTypeName}).ToList(); 
        }
    }

    public List<CardType> _cardTypes;
 }

控制器的方法：

    // GET: /MyCards/
    public ActionResult Index()
    {
        string userId = User.Identity.GetUserId();
        MyCardsViewModel viewModel = new MyCardsViewModel();
        var user = _userRepository.GetUser(userId);

        viewModel.PaymentCards = user.PaymentCards; //Don't mind this, it is something else :)
        var cardTypeList = _cardTypeRepository.GetCardTypes();

        viewModel.PaymentCardInformation=new AddPaymentcard 
        {
           _cardTypes = cardTypeList
        };

        return View(viewModel);
    }

 //Get: MyCards/AddPaymentcard
    public ActionResult AddPaymentcard()
    {
        return View();
    }

查看：

引入MyCardsViewModel的索引视图并添加部分视图AddPaymentcard.cshtml：

 @model Kvittering.TaxiFinans.Web.Models.MyCardsViewModel
 (...)
    @Html.Partial("~/Views/MyCards/AddPaymentcard.cshtml", @Model.PaymentCardInformation );

AddPaymentcard视图：

 @model Kvittering.TaxiFinans.Web.Models.AddPaymentcard

 (...)
 <div class="form-group">
    @Html.LabelFor(m => m.CardTypeName, new { @class = "control-label col-md-2"})
    <div class="col-md-offset-2 col-md-8">
        @Html.DropDownListFor(m => m.CardTypeName, @Model.CardTypeList)
    </div>
  </div>

任何人都可以帮我吗？：/

Answer 1

解决方案可以是Select new SelectListItem，这样您就可以停止使用硬编码字符串，并确保获得所需内容。

public class AddPaymentcard
{
   public string CardTypeName { get; set; }

    public IEnumerable<SelectListItem> CardTypeList
    {
        get { return _cardTypes.Select(x => new SelectListItem { Value = x.CardTypeName, Text = x.CardTypeName }); }
    }

    public List<CardType> _cardTypes;
 }

如果您的视图模型类型为MyCardsViewModel

，则必须更正此行

@Html.DropDownListFor(m => m.PaymentCardInformation.CardTypeName, @Model.PaymentCardInformation.CardTypeList)

MVC剃刀视图下拉框与模型中的项目

1 个答案: