在MVC 4视图中查询ViewData

问题是我从数据库返回一个照片记录，这在我的详细信息视图中工作得很好。然而，在细节下的控制器中，我还编译了一个列表对象，我希望在细节视图中显示它，因为它包含关联的其他照片。视图底部应该列出每个被引用的照片名称。我在使用Galleria。我想把这个插入到照片查看器中

当我尝试遍历列表中的每个项目时，我得到:

{"Object reference not set to an instance of an object."}

PhotosController

public ActionResult Details(int id = 0)
{
    Photos photos = db.FindPhotoById(id);
    if (photos == null)
    {
        return HttpNotFound();
    }
    List<Photos> photoList = GetImagesFromFilmID(8);
    ViewData["NumberOfImages"] = photoList.Count().ToString();
    ViewData["PhotoList"] = photoList;
    return View(photos);
}
public List<Photos> GetImagesFromFilmID(int filmID = 8 )
{
    List<Photos> photos;
    photos = (from p in db.Photos
              where p.PhotoDescription == "8"
              select p).Take(filmID).ToList();
    return photos;
}

详细信息视图

@model TestingMVCQA.Models.Photos
@*@model IEnumerable<TestingMVCQA.Models.Photos>*@
@{
    ViewBag.Title = "Details";
}
<h2>Details</h2>
<fieldset>
<legend>Photos</legend>
<div class="display-label">
    @Html.DisplayNameFor(model => model.PhotoName)
</div>
<div class="display-field">
    @Html.DisplayFor(model => model.PhotoName)
</div>
<div class="display-label">
    @Html.DisplayNameFor(model => model.PhotoDescription)
</div>
<div class="display-field">
    @Html.DisplayFor(model => model.PhotoDescription)
</div>
<div class="display-label">
    @Html.DisplayNameFor(model => model.PhotoFileName)
</div>
<div class="display-field">
    @Html.DisplayFor(model => model.PhotoFileName)
</div>
<div class="display-label">
    @Html.DisplayNameFor(model => model.ImageMimeType)
</div>
<div class="display-field">
    @Html.DisplayFor(model => model.ImageMimeType)
</div>
<script src="@Url.Content("~/Scripts/jquery-1.7.1.js")"></script>
<script src="@Url.Content("~/Scripts/galleria-1.3.6.js")"></script>
<style>
   .galleria{ width: 900px; height: 500px; background: #000 }
</style>
@if (Model.PhotoFile != null) {
  <div class="galleria">
     <img src="@Url.Action("GetImage", "Photos", new { id = Model.PhotoID })" data-title="My title" data-description="My description" />
<img src="@Url.Action("GetImage", "Photos", new { id = 5 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 6 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 7 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 8 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 9 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 10 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 11 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 12 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 13 })" />
<img src="@Url.Action("GetImage", "Photos", new { id = 14 })" />
</div>
}
<script>
    Galleria.loadTheme(src = "@Url.Content("~/Scripts/galleria.classic.js")");
    Galleria.run('.galleria');
</script>
</fieldset>
<p>Your favorite fruit is:</p>@ViewData["NumberOfImages"]
<p>
   @foreach (var item in ViewData["NumberOfImages"] as IEnumerable<TestingMVCQA.Models.Photos>)
{
}
</p>
<p>
@Html.ActionLink("Edit", "Edit", new { id=Model.PhotoID }) |
@Html.ActionLink("Back to List", "Index")
</p>

在索引视图中我有:

@model IEnumerable<TestingMVCQA.Models.Photos>

这允许我使用foreach，我理解为什么，但当我在细节视图中返回单个对象时，我有点困在如何解决这个问题上。所以当它全部工作时，我可以在图像本身上替换GetImage调用和foreach。

如果你需要任何额外的代码或解释，请告诉我。

@foreach (var item in ViewData["PhotoList"] as IEnumerable<TestingMVCQA.Models.Photos>)
{
  //@item.FileName //instead .FileName use property which you have used in your model class
}