C# '；System.Web.WebPages.Html.HtmlHelper'；不包含'；ActionLink

首先-我搜索了这么多，发现很多问题都问同样的问题，只是简单地添加了

我已经将MVC升级到版本5，将webApi升级到版本2，以便与解决方案中的其他项目保持一致

现在，在SPA站点的_布局页面中，我尝试使用
@Html.ActionLink
帮助程序，尽管不断得到错误
“System.Web.WebPages.Html.HtmlHelper”不包含“ActionLink

我确信这都是由于一些web.config配置造成的——我安装的软件包与模板中的配置之间存在某种冲突

特别是，本部分：

<system.web.webPages.razor>
    <host factoryType="System.Web.WebPages.Razor.WebRazorHostFactory, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <pages pageBaseType="System.Web.WebPages.WebPage">
      <namespaces>            
        <add namespace="System.Web.Helpers" />
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Optimization" />
        <add namespace="System.Web.Routing" />
        <add namespace="System.Web.WebPages" />
      </namespaces>
    </pages>
  </system.web.webPages.razor>

您是否尝试过清理解决方案，删除位于的临时ASP.NET文件

C:\WINDOWS\Microsoft.NET\Framework\v4.xxxx\ASP.NET临时文件

和重建？
我刚刚安装了Visual Studio 2013的更新2，我的问题消失了。
我正在使用VS 2013 Pro更新2。这就是我的工作原理：

关闭Visual Studio
删除bin和obj文件夹
重新打开解决方案并重建
视图上不再有错误
顺便说一句，不需要对配置文件进行任何更改，简单的清理和重建解决方案不起作用。
我正在处理VS 2015，我解决了这个问题

您需要检查Views/Web.Config文件。如果配置文件不存在，您可以复制另一个项目。在需要更改上的命名空间之后

-----**Views/Web.Config**---------



-----**Views/Web.Config**---------

如果您有配置文件，只需检查名称空间名称。
，packages.config文件中的所有内容都匹配吗？在配置的“运行时”部分，您可以尝试添加以将旧版本的assemply更改为新的添加到哪个dependentAssembly？-一切看起来都很匹配，尽管现在看起来都很模糊——已经盯着它看了几个小时了。。这是我在config的runtime部分下用来确保正在使用assemply的完整代码。几周前，我在从Web API 1到Web API 2的升级过程中遇到了类似的问题，这就解决了问题。@Dan您的解决方案不适用于区域内的视图。我在web.config中添加了“runtime”部分，用于该区域的视图，但没有成功。有什么想法吗？这对我在VS 2012上有效，还删除了ASP.NET临时文件。我在这件事上浪费了2个小时。最后删除了bin、obj和voila。解决方案构建并运行良好。
<sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
      <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    </sectionGroup>

Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web.WebPages.Razor, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.


=== Pre-bind state information ===
LOG: DisplayName = System.Web.WebPages.Razor, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
 (Fully-specified)
LOG: Appbase = file:///D:/Development/IS/IS/IS.TransactionDesk.SPA/
LOG: Initial PrivatePath = D:\Development\IS\IS\IS.TransactionDesk.SPA\bin
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: D:\Development\IS\IS\IS.TransactionDesk.SPA\web.config
LOG: Using host configuration file: C:\Users\Darren\Documents\IISExpress\config\aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Post-policy reference: System.Web.WebPages.Razor, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
LOG: Attempting download of new URL file:///C:/Users/Darren/AppData/Local/Temp/Temporary ASP.NET Files/root/3407d437/8e7ba9a/System.Web.WebPages.Razor.DLL.
LOG: Attempting download of new URL file:///C:/Users/Darren/AppData/Local/Temp/Temporary ASP.NET Files/root/3407d437/8e7ba9a/System.Web.WebPages.Razor/System.Web.WebPages.Razor.DLL.
LOG: Attempting download of new URL file:///D:/Development/IS/IS/IS.TransactionDesk.SPA/bin/System.Web.WebPages.Razor.DLL.
WRN: Comparing the assembly name resulted in the mismatch: Major Version
ERR: Failed to complete setup of assembly (hr = 0x80131040). Probing terminated.

Stack Trace: 


[FileLoadException: Could not load file or assembly 'System.Web.WebPages.Razor, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)]
   System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type) +0
   System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName) +70
   System.RuntimeType.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) +39
   System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +37
   System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +65
   System.Web.WebPages.Razor.WebRazorHostFactory.DefaultTypeFactory(String typeName) +39
   System.Web.WebPages.Razor.WebRazorHostFactory.CreateFactory(String typeName) +67
   System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory) +72
   System.Web.WebPages.Razor.WebRazorHostFactory.CreateHostFromConfigCore(RazorWebSectionGroup config, String virtualPath, String physicalPath) +313
   System.Web.WebPages.Razor.WebRazorHostFactory.CreateHostFromConfig(String virtualPath, String physicalPath) +228
   System.Web.WebPages.Razor.WebRazorHostFactory.CreateHostFromConfig(String virtualPath) +38
   System.Web.WebPages.Razor.RazorBuildProvider.GetHostFromConfig() +51
   System.Web.WebPages.Razor.RazorBuildProvider.CreateHost() +57
   System.Web.WebPages.Razor.RazorBuildProvider.get_Host() +56
   System.Web.WebPages.Razor.RazorBuildProvider.EnsureGeneratedCode() +77
   System.Web.WebPages.Razor.RazorBuildProvider.get_CodeCompilerType() +54
   System.Web.Compilation.BuildProvider.GetCompilerTypeFromBuildProvider(BuildProvider buildProvider) +59
   System.Web.Compilation.BuildProvidersCompiler.ProcessBuildProviders() +209
   System.Web.Compilation.BuildProvidersCompiler.PerformBuild() +30
   System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) +9881909
   System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +299
   System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +103
   System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) +165
   System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) +43
   System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(String virtualPath, Type requiredBaseType) +28
   System.Web.WebPages.BuildManagerWrapper.CreateInstanceOfType(String virtualPath) +343
   System.Web.WebPages.VirtualPathFactoryExtensions.CreateInstance(IVirtualPathFactory factory, String virtualPath) +236
   System.Web.WebPages.VirtualPathFactoryManager.CreateInstanceOfType(String virtualPath) +261
   System.Web.WebPages.VirtualPathFactoryExtensions.CreateInstance(IVirtualPathFactory factory, String virtualPath) +132
   System.Web.WebPages.WebPageHttpHandler.CreateFromVirtualPath(String virtualPath, IVirtualPathFactory virtualPathFactory) +58
   System.Web.WebPages.WebPageHttpHandler.CreateFromVirtualPath(String virtualPath) +59
   IS.TransactionDesk.SPA.Routing.DefaultRouteHandler.GetHttpHandler(RequestContext requestContext) in d:\Development\IS\IS\IS.TransactionDesk.SPA\Routing\DefaultRouteHandler.cs:42
   System.Web.Routing.UrlRoutingModule.PostResolveRequestCache(HttpContextBase context) +9598252
   System.Web.Routing.UrlRoutingModule.OnApplicationPostResolveRequestCache(Object sender, EventArgs e) +82
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +136
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

<namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Optimization"/>
        <add namespace="System.Web.Routing" />
        <add namespace="YourProjectName" />
</namespaces>