visual studio 2012 RC无法加载System.Web.Http.RouteParameter类型

Question

我在我的电脑上安装了VS 11 Beta,.net 4.5和MVC 4 beta.我刚下载了最新的RC,现在我在尝试运行Web项目时收到此错误消息.我尝试重新安装.net 4.5并卸载和树脂安装VS 12 RC,但这没有用.我尝试了这里的建议,但也没有用.

堆

Could not load type 'System.Web.Http.RouteParameter' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.TypeLoadException: Could not load type 'System.Web.Http.RouteParameter' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

Source Error:


Line 26:                 defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
Line 27:             );
Line 28:         }
Line 29:     }
Line 30: }


Source File: c:\projects\testNew\testNew\App_Start\RouteConfig.cs    Line: 28

Stack Trace:


[TypeLoadException: Could not load type 'System.Web.Http.RouteParameter' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.]
   testNew.RouteConfig.RegisterRoutes(RouteCollection routes) in c:\projects\testNew\testNew\App_Start\RouteConfig.cs:28
   testNew.MvcApplication.Application_Start() in c:\projects\testNew\testNew\Global.asax.cs:25

[HttpException (0x80004005): Could not load type 'System.Web.Http.RouteParameter' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +9841101
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +336
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Could not load type 'System.Web.Http.RouteParameter' from assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9850940
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.17626 

编辑6

我用过fuslogvw并发现该项目是System.Web.Http.dll从这里引用的

C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Http\v4.0_4.0.0.0__31bf3856ad364e35

而不是我的项目.重命名这个文件使我的项目工作,但我显然不能在我的共享主机网站上这样做.

我手动引用了dll

C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies

并将其设置为Copy to Local.它仍然加载gac_msil.我该如何覆盖它？

Answer 1

我有同样的问题,在谷歌上搜索错误时发现了这个问题.当我查看窗口上安装的程序时,我看到安装了3个MVC 4'应用程序':

1. MVC 4 VS 2010工具
2. MVC 4
3. MVC 4(捆绑)

我卸载了"MVC 4"应用程序,然后我的项目工作正常.

Answer 2

目前答案是从文件夹中替换dll

C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies

成

C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Http\v4.0_4.0.0.0__31bf3856ad364e35

升级到Beta顶部到RC工作在另一台机器上.我希望这可以帮助将来的某个人.

如果我找到更好的答案,我会更新

Answer 3

我建议你也从MVC4 Beta升级到MVC4 RC:http://www.asp.net/mvc/mvc4 并根据发行说明:'你可以将ASP.NET MVC 4 Developer Preview和Beta升级到ASP.NET MVC 4 Release Candidate,无需卸载.

我做到了这一点并摆脱了错误.

原因是您的应用程序指向GAC中的旧MVC4 Beta.

另一种方法是使用此链接中提到的DEVPATH环境变量. http://www.christophdebaene.com/blog/2012/04/06/building-the-source-code-of-asp-net-web-api/

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