Asp.net mvc ASP.Net MVC 3.0“；执行子请求时出错"；在开发服务器上，但在本地计算机上运行良好

这是我的堆栈跟踪

[NullReferenceException: Object reference not set to an instance of an object.] HRORx.Controllers.LeftNavLinksController.LeftNavServices() in C:\Common\PRO\HRORx\Controllers\LeftNavLinksController.cs:30 lambda_method(Closure , ControllerBase , Object[] ) +78 System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +263 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +38 System.Web.Mvc.c__DisplayClass15.b__12() +128 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +826410 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +314 System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +825632 System.Web.Mvc.Controller.ExecuteCore() +159 System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +335 System.Web.Mvc.c__DisplayClassb.b__5() +62 System.Web.Mvc.Async.c__DisplayClass1.b__0() +20 System.Web.Mvc.c__DisplayClasse.b__d() +54 System.Web.Mvc.c__DisplayClass4.b__3() +15 System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Func`1 func) +41 System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +1443 [HttpException (0x80004005): Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.] System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +2515 System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage) +242 System.Web.HttpServerUtilityWrapper.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm) +94 System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter) +834 System.Web.Mvc.Html.ChildActionExtensions.Action(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues) +123 ASP._Page_Views_Shared__LeftNavLinks_cshtml.Execute() in c:\Server\Web\rx\Views\Shared\_LeftNavLinks.cshtml:2 System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +280 System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +104 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +173 System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) +158 ASP._Page_Views_Shared__Layout_cshtml.Execute() in c:\Server\Web\rx\Views\Shared\_Layout.cshtml:54 System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +280 System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +104 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +173 System.Web.WebPages.WebPageBase.Write(HelperResult result) +89 System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action`1 body) +234 System.Web.WebPages.WebPageBase.PopContext() +222 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +384 System.Web.Mvc.c__DisplayClass1c.b__19() +33 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +825604 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +265 System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +825632 System.Web.Mvc.Controller.ExecuteCore() +159 System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +335 System.Web.Mvc.c__DisplayClassb.b__5() +62 System.Web.Mvc.Async.c__DisplayClass1.b__0() +20 System.Web.Mvc.c__DisplayClasse.b__d() +54 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +469 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +375 [NullReferenceException:对象引用未设置为对象的实例。] C:\Common\PRO\HRORx\Controllers\LeftNavLinksController.cs:30中的HRORx.Controllers.LeftNavLinksController.LeftNavServices（） lambda_方法（闭包、控制器基、对象[]）+78 System.Web.Mvc.ReflectedActionDescriptor.Execute（ControllerContext ControllerContext，IDictionary`2参数）+263 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext ControllerContext，ActionDescriptor ActionDescriptor，IDictionary`2参数）+38 System.Web.Mvc.c__显示类15.b__12（）+128 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter（IActionFilter筛选器、ActionExecutingContext预文本、Func`1 continuation）+826410 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters（ControllerContext ControllerContext，IList`1筛选器，ActionDescriptor ActionDescriptor，IDictionary`2参数）+314 System.Web.Mvc.ControllerActionInvoker.InvokeAction（ControllerContext ControllerContext，String actionName）+825632 System.Web.Mvc.Controller.ExecuteCore（）+159 System.Web.Mvc.ControllerBase.Execute（RequestContext）+335 System.Web.Mvc.c__显示类b.b__5（）+62 System.Web.Mvc.Async.c__显示类1.b__0（）+20 System.Web.Mvc.c_uuudisplayClasse.b_uuud（）+54 System.Web.Mvc.c__显示类4.b__3（）+15 System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap（Func`1 Func）+41 System.Web.HttpServerUtility.ExecuteInternal（IHttpHandler处理程序、TextWriter编写器、Boolean preserveForm、Boolean setPreviousPage、VirtualPath路径、VirtualPath文件路径、字符串physPath、异常错误、字符串queryStringOverride）+1443 [HttpException（0x80004005）：执行处理程序'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'的子请求时出错。] System.Web.HttpServerUtility.ExecuteInternal（IHttpHandler处理程序、TextWriter编写器、Boolean preserveForm、Boolean setPreviousPage、VirtualPath路径、VirtualPath文件路径、字符串physPath、异常错误、字符串queryStringOverride）+2515 System.Web.HttpServerUtility.Execute（IHttpHandler处理程序、TextWriter编写器、Boolean preserveForm、Boolean setPreviousPage）+242 System.Web.HttpServerUtilityWrapper.Execute（IHttpHandler处理程序、TextWriter编写器、布尔形式）+94 System.Web.Mvc.Html.ChildActionExtensions.ActionHelper（HtmlHelper、String actionName、String controllerName、RouteValueDictionary routeValues、TextWriter TextWriter）+834 System.Web.Mvc.Html.ChildActionExtensions.Action（HtmlHelper HtmlHelper，String actionName，String controllerName，RouteValueDictionary routeValues）+123 ASP.\页面\视图\共享\左导航链接\ cshtml.Execute（）中的c:\Server\Web\rx\Views\Shared\\左导航链接。cshtml:2 System.Web.WebPages.WebPageBase.ExecutePageHierarchy（）+280 System.Web.Mvc.WebViewPage.ExecutePageHierarchy（）+104 System.Web.WebPages.WebPageBase.ExecutePageHierarchy（WebPageContext-pageContext、TextWriter-writer、WebPageRenderingBase-startPage）+173 System.Web.Mvc.Html.PartialExtensions.Partial（HtmlHelper HtmlHelper，字符串partialViewName，对象模型，ViewDataDictionary viewData）+158 c:\Server\Web\rx\Views\Shared\\u Layout.cshtml中的ASP System.Web.WebPages.WebPageBase.ExecutePageHierarchy（）+280 System.Web.Mvc.WebViewPage.ExecutePageHierarchy（）+104 System.Web.WebPages.WebPageBase.ExecutePageHierarchy（WebPageContext-pageContext、TextWriter-writer、WebPageRenderingBase-startPage）+173 System.Web.WebPages.WebPageBase.Write（HelperResult结果）+89 System.Web.WebPages.WebPageBase.rendersUrounding（字符串partialViewName，Action`1 body）+234 System.Web.WebPages.WebPageBase.PopContext（）+222 System.Web.Mvc.ViewResultBase.ExecuteResult（ControllerContext上下文）+384 System.Web.Mvc.c__显示Class1C.b__19（）+33 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter（IResultFilter筛选器，ResultExecutingContext预文本，Func`1 continuation）+825604 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters（ControllerContext ControllerContext，IList`1 filters，ActionResult ActionResult）+265 System.Web.Mvc.ControllerActionInvoker.InvokeAction（ControllerContext ControllerContext，String actionName）+825632 System.Web.Mvc.Controller.ExecuteCore（）+159 System.Web.Mvc.ControllerBase.Execute（RequestContext）+335 System.Web.Mvc.c__显示类b.b__5（）+62 System.Web.Mvc.Async.c__显示类1.b__0（）+20 System.Web.Mvc.c_uuudisplayClasse.b_uuud（）+54 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+469 System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值&同步完成）+375 我可以在本地计算机上构建和运行应用程序，而不会出现任何问题
，但当我将其部署到开发服务器时，会出现此错误
如有任何帮助，将不胜感激

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谢谢

堆栈跟踪正在抱怨C:\Common\PRO\HRORx\Controllers\LeftNavLinksController.cs的第30行。你检查过那条线上的一切了吗？有没有可能在这条线上或周围发布正在发生的事情

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另外，您是否在该控制器方法中使用LINQ？我遇到了一个类似的错误，返回的列表包含表中的空值。我的本地数据库（没有空值）和生产环境（有空值）之间的数据不同

是的，我正在使用Linq，此时的逻辑返回空值。但是怎么做呢？实际上这是开发服务器，数据库是相同的，但仍然返回Null。谢谢