“/”应用程序中的服务器错误。

“Visitor”的“understand”属性不能设置为“String”值。必须将该属性设置为类型为“Int32”的非 null 值。

说明: 执行当前 Web 请求期间,出现未经处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.InvalidOperationException: “Visitor”的“understand”属性不能设置为“String”值。必须将该属性设置为类型为“Int32”的非 null 值。

源错误:


行 24:         <ul>
行 25:         @{
行 26:             var vs = Onpf.Bll.VisitorServicer.GetLastVisitor(0, 5);
行 27:             foreach (var item in vs)
行 28:             {

源文件: d:\WWW\master\Areas\preview\Views\Template\wsblh\品牌展会右边嵌套.cshtml    行: 26

堆栈跟踪:


[InvalidOperationException: “Visitor”的“understand”属性不能设置为“String”值。必须将该属性设置为类型为“Int32”的非 null 值。]
   System.Data.Common.Internal.Materialization.ErrorHandlingValueReader`1.GetValue(DbDataReader reader, Int32 ordinal) +217
   lambda_method(Closure , Shaper ) +994
   System.Data.Common.Internal.Materialization.Shaper.HandleEntityAppendOnly(Func`2 constructEntityDelegate, EntityKey entityKey, EntitySet entitySet) +43
   lambda_method(Closure , Shaper ) +65
   System.Data.Common.Internal.Materialization.Coordinator`1.ReadNextElement(Shaper shaper) +164
   System.Data.Common.Internal.Materialization.SimpleEnumerator.MoveNext() +87
   System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +484
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +54
   Onpf.Service.VisitorServicer.GetLastVisitor(Int32 fairID, Int32 top) +1238
   ASP._Page_Areas_preview_Views_Template_wsblh_品牌展会右边嵌套_cshtml.Execute() in d:\WWW\master\Areas\preview\Views\Template\wsblh\品牌展会右边嵌套.cshtml:26
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +198
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +107
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +90
   System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +218
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +107
   System.Web.Mvc.HtmlHelper.RenderPartialInternal(String partialViewName, ViewDataDictionary viewData, Object model, TextWriter writer, ViewEngineCollection viewEngineCollection) +277
   System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) +106
   System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName) +32
   HtmlExtension.Import(HtmlHelper htmlHelper, String tempname) in D:\work\CCCEx\Tcm\HtmlExtension.cs:27
   ASP._Page_Areas_preview_Views_Template_wsblh_品牌展会中国供应商_cshtml.Execute() in d:\WWW\master\Areas\preview\Views\Template\wsblh\品牌展会中国供应商.cshtml:79
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +198
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +107
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +78
   System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +218
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +107
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +291
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245
   System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +22
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +176
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +324
   System.Web.Mvc.Controller.ExecuteCore() +106
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +88
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +34
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +16
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +46
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +23
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +59
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +577
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +132
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +163


版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.8.4676.0