ASP.NET MVC 2应用程序在VS中运行，但在IIS上出错

问题描述

|| 我们继承了在Visual Studio中运行的MVC 2应用程序，但是当我们尝试将其部署到生产服务器（Win 2008 x86）甚至同一台本地Win7 x64计算机上但使用IIS时，两者上的AppPool都是ASP.NET 4.0 w / Integrated模式，我们收到相同的NullReferenceException错误：

    Server Error in \'/\' Application.
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Object reference not set to an instance of an object. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more @R_730_4045@ion about the error and where it originated in the code. 

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error: 

An unhandled exception was generated during the execution of the current web request. @R_730_4045@ion regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.PipelineModuleStepContainer.GetEventCount(RequestNotification notification,Boolean isPostEvent) +30
   System.Web.PipelinestepManager.ResumeSteps(Exception error) +266
   System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context,AsyncCallback cb) +132
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr,HttpContext context) +709

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Version @R_730_4045@ion: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1 

还有其他人经历过吗？任何建议表示赞赏。 谢谢！     

解决方法

我想到的一个可能的原因是，应用程序托管在HttpContext在model1ѭ中不可用的集成模型中。因此，如果您的应用程序尝试访问HttpContext，Request，Response，则可能会抛出此错误。     ,从tbe web.config中删除codedom标记，这将创建问题。 （我在VS 2017社区中遇到了这个问题

<system.codedom>    </system.codedom>