“/”应用程序中的服务器错误。

无法将 null 转换为“bool”,因为后者是不可以为 null 的值类型

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: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 无法将 null 转换为“bool”,因为后者是不可以为 null 的值类型

源错误:


行 208:                                    <tr>
行 209:                                        <td width="62%" height="37" align="right">
行 210:                                            @if (Model.BuyStatus == 3 || ViewBag.IsPaid)
行 211:                                            {
行 212:                                                <a id="lnkBuy"><img style="border-width:0px;" src="/common/images/cs.jpg" /></a>

源文件: e:\jiaodianpt\Views\ZhangHao\Detail.cshtml    行: 210

堆栈跟踪:


[RuntimeBinderException: 无法将 null 转换为“bool”,因为后者是不可以为 null 的值类型]
   CallSite.Target(Closure , CallSite , Object ) +148
   System.Dynamic.UpdateDelegates.UpdateAndExecute1(CallSite site, T0 arg0) +664
   ASP._Page_Views_zhanghao_Detail_cshtml.Execute() in e:\jiaodianpt\Views\ZhangHao\Detail.cshtml:210
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +148
   System.Web.WebPages.StartPage.ExecutePageHierarchy() +86
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +375
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +88
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +775
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +81
   System.Web.Mvc.Async.<>c__DisplayClass3_1.<BeginInvokeAction>b__1(IAsyncResult asyncResult) +188
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +26
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +39
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +40
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +648
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +213
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +131


版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.7.3062.0