从ViewData的的NullReferenceException这是不实际空 [英] NullReferenceException from ViewData which is Not Null actually

问题描述

截图

我觉得截图说明了一切。我怎样才能解决这个问题呢？即使数据不为空，它给空引用异常。

堆栈跟踪是如下：

 在ASP._Page_Views_Profile_Index_cshtml.Execute（）在C：\\ AAAAAA \\ AAA \\ AAAAAA \\查看\\简介\\ Index.cshtml：17行
   在System.Web.WebPages.WebPageBase.ExecutePageHierarchy（）
   在System.Web.Mvc.WebViewPage.ExecutePageHierarchy（）
   在System.Web.WebPages.StartPage.ExecutePageHierarchy（）
   在System.Web.WebPages.WebPageBase.ExecutePageHierarchy（WebPageContext的pageContext，TextWriter的作家，WebPageRenderingBase起始页）
   在System.Web.Mvc.ViewResultBase.ExecuteResult（ControllerContext上下文）
   在System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17()
   在System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter（IResultFilter过滤器，ResultExecutingContext preContext，Func`1续）
 

解决方案

我打赌了线程问题。当视图引擎尝试显示/绑定值（MobilePhone）是null，并且它抛出异常，但在此期间，负责调试器加载数据的完成和期望时/查看值的值线程是present。

ScreenShot

I think the screenshot explains everything. How can i resolve this problem ? Even the data is not null, it gives null reference exception..

Stacktrace is below:

   at ASP._Page_Views_Profile_Index_cshtml.Execute() in c:\aaaaaa\aaa\aaaaaa\Views\Profile\Index.cshtml:line 17
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.StartPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)  

解决方案

I'm betting for a threading issue. When the ViewEngine tries to display/bind the value(MobilePhone) it's null and it throws the exception but in the meantime the thread responsible for loading the data finishes and when expecting/viewing the value in the debugger the value is present.

这篇关于从ViewData的的NullReferenceException这是不实际空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！