Could not load type 'System.Web.Http.WebHost.Routing.Htt

本文关键字：Http Web WebHost Routing Htt System load not type Could | 更新日期: 2023-09-27 18:08:36

我尝试使用最新的Asp。. Net Web API，但是错误显示如下:

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

我应该通过Nuget包含哪些dll ?目前我引用了这些程序集:

- 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)

Could not load type 'System.Web.Http.WebHost.Routing.Htt

在Xamarin bugzilla中有一个类似的错误。显然，为了使用最新的Web API库，Mono aspnetwebstack需要首先更新:

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

我想我添加我的答案太晚了，但我刚刚有类似的问题，并且为了调试，我在源代码中添加了以下行:

var httpHost = new System.Web.Http.WebHost.HttpControllerHandler(null);

你看，编译失败了(我在这里换行):

Global.asax.cs(116,56): error CS1684: Reference to type
 `System.Web.HttpTaskAsyncHandler' claims it is defined assembly 
 `System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a',
  but it could not be found

所以，基本上-是的。被破坏的System.Web.dll

这可能可以通过简单地不使用config.MapHttpAttributeRoutes();，而是手动指定Web API路由(例如config.Routes.MapHttpRoute…)来解决。

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