asp.net – 带有MVC 2的自定义ViewModel强类型HTML Helper在Crea

public class CategoryFormViewModel
{
    public CategoryFormViewModel(Category category,string actionTitle)
    {
        Category = category;
        ActionTitle = actionTitle;
    }

    public Category Category { get; private set; }
    public string ActionTitle { get; private set; }
}

这是UI的用户控件

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<CategoryFormViewModel>" %>

        <h2>
            <span><%= Html.Encode(Model.ActionTitle) %></span>
        </h2>
        <%=Html.ValidationSummary() %>
        <% using (Html.BeginForm()) {%>
        <p>
            <span class="bold block">Ba?l?k:</span>
            <%=Html.TextBoxFor(model => Model.Category.Title,new { @class = "width80 txt-base" })%>
        </p>
        <p>
            <span class="bold block">S?ra Numaras?:</span>
            <%=Html.TextBoxFor(model => Model.Category.OrderNo,new { @class = "width10 txt-base" })%>
        </p>        
        <p>
            <input type="submit" class="btn-admin cursorPointer" value="Save" />
        </p>
        <% } %>

当我点击保存按钮时,它不会为我绑定类别,因为我使用自定义视图模型和强类型的html帮助器,如此

<%=Html.TextBoxFor(model => Model.Category.OrderNo) %>

我的html源代码如下

<form action="/Admin/Categories/Create" method="post">
        <p>
            <span class="bold block">Ba?l?k:</span>
            <input class="width80 txt-base" id="Category_Title" name="Category.Title" type="text" value="" />
        </p>
        <p>
            <span class="bold block">S?ra Numaras?:</span>
            <input class="width10 txt-base" id="Category_OrderNo" name="Category.OrderNo" type="text" value="" />
        </p>        
        <p>
            <input type="submit" class="btn-admin cursorPointer" value="Kaydet" />
        </p>
        </form>

我怎样才能解决这个问题？