在单声道未能加载类型'System.Web.Http.WebHost.Routing.HttpRouteExceptionHandler“

问题描述

我试着在单声道使用最新的Asp.Net的Web API，但错误显示是这样的：

  System.TypeLoadException
未能从程序集加载类型System.Web.Http.WebHost.Routing.HttpRouteExceptionHandler'System.Web.Http.WebHost，版本= 5.1.0.0，文化=中性公钥= 31bf3856ad364e35'。说明：HTTP 500.Error处理请求。
联系方式：非网上例外。异常原点（应用程序或对象的名称）：System.Web程序。
异常堆栈跟踪：
  在System.Web.Routing.UrlRoutingModule.PostResolveRequestCache（System.Web.HttpContextBase上下文）[0x00054]中/Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web.Routing/System.Web.Routing/UrlRoutingModule.cs:128
  在System.Web.Routing.UrlRoutingModule.PostResolveRequestCache（System.Object的0，System.EventArgs发送）[0x00007]中/Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web.Routing/System.Web.Routing/UrlRoutingModule.cs:88
  在System.Web.HttpApplication +下; RunHooks＆GT; c__Iterator0.MoveNext（）[0x001ba]在/Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web/System.Web/HttpApplication.cs ：1050
  在System.Web.HttpApplication +下;管道＆GT; c__Iterator1.MoveNext（）[0x0073b]在/Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web/System.Web/HttpApplication.cs ：1260
  在System.Web.HttpApplication.Tick（）[0x00000]在/Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web/System.Web/HttpApplication.cs:932版本信息：3.4.0（（无/ c3fc3ba周四5月1日22时52分17秒EDT 2014年）; ASP.NET版本：4.0.30319.17020
 

和我应通过的NuGet包括哪些DLL？目前，我引用这些程序集：

   - 系统（从GAC）
 -  System.Web程序（从GAC）
 -  System.Web.Http（来自的NuGet）
 -  System.Net.Http.Formatting（来自的NuGet）
 -  System.Web.Http.WebHost（来自的NuGet）
 -  Newtonsoft.Json（来自的NuGet）
 

解决方案

有在Xamarin的Bugzilla类似的错误。显然，单aspnetwebstack首先需要更新才能使用最新的Web API库：

I tried to use latest Asp.Net Web API in Mono, but the error shows like this:

System.TypeLoadException
Could not load type 'System.Web.Http.WebHost.Routing.HttpRouteExceptionHandler' from assembly 'System.Web.Http.WebHost, Version=5.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

Description: HTTP 500.Error processing request.
Details: Non-web exception. Exception origin (name of application or object): System.Web.
Exception stack trace:
  at System.Web.Routing.UrlRoutingModule.PostResolveRequestCache (System.Web.HttpContextBase context) [0x00054] in /Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web.Routing/System.Web.Routing/UrlRoutingModule.cs:128
  at System.Web.Routing.UrlRoutingModule.PostResolveRequestCache (System.Object o, System.EventArgs e) [0x00007] in /Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web.Routing/System.Web.Routing/UrlRoutingModule.cs:88
  at System.Web.HttpApplication+<RunHooks>c__Iterator0.MoveNext () [0x001ba] in /Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web/System.Web/HttpApplication.cs:1050
  at System.Web.HttpApplication+<Pipeline>c__Iterator1.MoveNext () [0x0073b] in /Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web/System.Web/HttpApplication.cs:1260
  at System.Web.HttpApplication.Tick () [0x00000] in /Volumes/build-root-ramdisk/mono-3.4.0/mcs/class/System.Web/System.Web/HttpApplication.cs:932

Version Information: 3.4.0 ((no/c3fc3ba Thu May 1 22:52:17 EDT 2014); ASP.NET Version: 4.0.30319.17020

And what dlls I should include via Nuget? Currently I referenced these assemblies:

- System (from GAC)
- System.Web (from GAC)
- System.Web.Http (from Nuget)
- System.Net.Http.Formatting (from Nuget)
- System.Web.Http.WebHost (from Nuget)
- Newtonsoft.Json (from Nuget)

解决方案

There is a similar bug in Xamarin bugzilla. Apparently Mono aspnetwebstack needs to be updated first in order to use latest Web API libraries:

https://bugzilla.xamarin.com/show_bug.cgi?id=19314

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