“/”应用程序中的服务器错误。

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行 2:  @{
行 3:      var images = Model.GetFields("image");
行 4:      var lastVersion = Model.ProductVersionEntities.OrderByDescending(p => p.CreateDate).FirstOrDefault();
行 5:  }
行 6:  

[ArgumentNullException: 值不能为 null。
参数名: source]
   System.Linq.OrderedEnumerable`2..ctor(IEnumerable`1 source, Func`2 keySelector, IComparer`1 comparer, Boolean descending) +157
   System.Linq.Enumerable.OrderByDescending(IEnumerable`1 source, Func`2 keySelector) +82
   ASP._Page_Modules_Product_Views_Widget_ProductDetail_cshtml.Execute() in e:\web\ww.jiyw.com\Modules\Product\Views\Widget.ProductDetail.cshtml:4
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +253
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +147
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +122
   System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) +137
   Easy.Web.CMS.HtmlHelperExtend.DisPlayWidget(HtmlHelper html, WidgetPart widget) +71
   ASP._Page_Modules_Common_Views_Page_PreView_cshtml.Execute() in e:\web\ww.jiyw.com\Modules\Common\Views\Page\PreView.cshtml:37
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +253
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +147
   System.Web.WebPages.StartPage.ExecutePageHierarchy() +89
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +375
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +31
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +437
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +437
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +185
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +59
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +27
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +22
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +74
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +22
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +59
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +42
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +399
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +157