所以我在将类数据提交到MVC视图时遇到了一些问题。（我刚接触MVC btw）通常情况下，这不会有问题，因为我可以稍后获取数据或执行某些操作，但问题出在我的controller类中，它验证数据返回false并中断函数。我可以删除验证器，但不幸的是它是必需的，我没有时间重写它。

我离题了...我的问题是如何将数据绑定到视图上？

模型如下：

public partial class Product
{
    public int Id { get; set; }
    public string Code { get; set; }
    public string Description { get; set; }
    public int CatalogId { get; set; }

    public virtual Catalog Catalog { get; set; } //<-- This is where my Problem is
}

这是一个视图：

<table>
@if (ViewBag.Product != null)
{
    using (Html.BeginForm("Update", "Product", FormMethod.Post))
    {
        <tr>
            <td>Id</td>
            <td>@Html.TextBoxFor(model => model.Id, new { @Value = ViewBag.Product.Id })</td>
            <td>@Html.ValidationMessageFor(model => model.Id)</td>
        </tr>
        <tr>
            <td>Code</td>
            <td>@Html.TextBoxFor(model => model.Code, new { @Value = ViewBag.Product.Code })</td>
            <td>@Html.ValidationMessageFor(model => model.Code)</td>
        </tr>
        <tr>
            <td>Description</td>
            <td>@Html.TextBoxFor(model => model.Description, new { @Value = ViewBag.Product.Description })</td>
            <td>@Html.ValidationMessageFor(model => model.Description)</td>
        </tr>
        <tr>
            <td>CatalogId</td>
            <td>@Html.TextBoxFor(model => model.CatalogId, new { @Value = ViewBag.Product.CatalogId })</td>
            <td>@Html.ValidationMessageFor(model => model.CatalogId)</td>
        </tr>
        <tr>
            <td>@Html.ValueFor(model => model.Catalog, new { @Value = ViewBag.Product.Catalog })</td> //<-- This is where my Problem is
            <td>@Html.ValidationMessageFor(model => model.Catalog)</td>
        </tr>
        <tr>
            <td><button type="submit">Update</button></td>
        </tr>
    }
}

这是控制器方法：

[HttpPost]
    [ActionName("Update")]
    public ActionResult Update(EURIS.Entities.Product product)
    {
        if (ModelState.IsValid) //<-- Product.Catalog is null and IsValid return false
        {
            ProductManager productManager = new ProductManager();
            productManager.UpdateProduct(product);
        }

        return RedirectToAction("Index");
    }