渲染部分未渲染.NET mvc

Question

我在渲染局部时遇到了问题。我环顾四周，发现您应该将部分视图的路径作为第一个参数传递，如果您使用的是第二个参数，您的模型应该传递给第二个参数，因为它是重载之一。我得到了页面，没有任何东西爆炸，但是部分视图没有输出我的预期结果，我不能在那个部分上打断点（它正在使用循环）。我已经确认我正在向它传递一个带有数据的模型，但部分似乎没有受到影响。这是我的控制器和部分。

    DataBass db = new DataBass();

    public ActionResult Address()
    {
        Models.ViewModels.CheckoutViewModel x = new Models.ViewModels.CheckoutViewModel();

        if (User.Identity.IsAuthenticated)
        {
            using(DataBass oDB = new DataBass())
            {
                var Customer = oDB.Customers.First(c => c.Email.ToLower() == User.Identity.Name.ToLower());
                var AvailableAddresses = oDB.AddressBooks.Where(ab => ab.CustomerID == Customer.ID).ToList();
                x.CustomerID = Customer.ID;
                x.HasExistingAddresses = (AvailableAddresses.Count > 0 ? false : true);
                x.AvailableAddresses = AvailableAddresses;


            }
            //var UserAddresses = db.AddressBooks.Where(a => a.Customer.Email == User.Identity.Name);
            //ViewBag.Addresses = UserAddresses;
            return View("Shipping", x);
        }                
        else
            return View("Index");
    }

这是我遇到问题的部分观点。这是没有受到打击的地方。

@model IEnumerable<Models.AddressBook>

<h2>AddressBook</h2>

<table class="table">
    <tr>
        <th>
            Address 2
        </th>
        <th>
           Address 1
        </th>
        <th>
            City
        </th>
        <th>
            State
        </th>
        <th>
            Postal Code
        </th>
        <th></th>
    </tr>

    @foreach (var item in Model)
    {
        var states = (List<Models.State>)ViewBag.States;

        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.Address1)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Address2)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.City)
            </td>
            <td>
                @states.FirstOrDefault(x => x.ID.ToString() == item.StateID).Name
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Zipcode)
            </td>
            <td>
                @Html.ActionLink("Choose this one","", new { id = item.ID}, new { @class="button"})
                @*@Html.ActionLink("Edit", "EditAddress", new { id = item.ID }, null) |
                @Html.ActionLink("Delete", "DeleteAddress", new { id = item.ID }, null)

                @*<a href="/Account/EditAddress/@item.AddressBook_ID">Edit</a> |
                    <a href="/Account/DeleteAddress/@item.AddressBook_ID">Delete</a>
                @Html.ActionLink("Edit", "EditAddress", new { id = item.ID }, null) |
                @Html.ActionLink("Edit", "EditAddress", "Account",new { id=item.AddressBook_ID }, htmlAttributes: null ) |
                @Html.ActionLink("Delete", "DeleteAddress", new { id = item.ID }, null)*@
            </td>
        </tr>
    }

</table>

这是我的观点，它将 renderpartial 方法调用到上面显示的 ChooseExistingAddress.cshtml 部分。

@model Models.ViewModels.CheckoutViewModel

@{
    ViewBag.Title = "Shipping Selection";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Shipping</h2>
@if (Model.HasExistingAddresses)
{
    Html.RenderPartial("~/Views/Checkout/ChooseExistingAddress.cshtml", Model.AvailableAddresses);

}
else
{
    Html.RenderPartial("~/Views/Checkout/AddNewShippingAddress.cshtml");
}

Answer 1

你的三元逻辑倒退了：

x.HasExistingAddresses = (AvailableAddresses.Count > 0 ? false : true);

换句话说，如果地址计数大于 0，则将其设置为 false，而在这种情况下，它应该为 true。无论如何，你真的不需要三元组。只需将其设置为布尔表达式的结果：

x.HasExistingAddresses = AvailableAddresses.Count > 0;