@ViewBag在当前上下文中不存在 [英] @ViewBag does not exist on current context

问题描述

我知道已经有一些在线解决方案，但是尝试所有解决方案后，我对自己感到困惑.

I understand there are some solutions online already but I am confused by myself after trying all the solutions.

我只想澄清我尝试过的解决方案:

I just want to clarify the solutions which I tried:

1. 确保其中有Microsoft.AspNet.Web.Optimization或System.Web.Optimization.我在引用"文件夹中有System.Web.Optimization.我试图在Nuget中安装Microsoft.AspNet.Web.Optimization，控制台告诉我它已经存在.我认为这意味着我已经在参考文献中找到了它.

2. 将名称空间添加到~/Views/Web.config(不是root Web.config).在我的~/Views/Web.config中，我有:

1. Make sure Microsoft.AspNet.Web.Optimization or System.Web.Optimization is there. I have System.Web.Optimization in References folder. I tried to install Microsoft.AspNet.Web.Optimization in Nuget and the console told me it already exists. I think this means I have it in references already.

2. Add the namespace to ~/Views/Web.config(not root Web.config). In my ~/Views/Web.config I have:

<system.web.webPages.razor>
   <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, 
   System.Web.Mvc, Version=3.0.0.0, Culture=neutral, 
   PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
 <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>

并在我的根目录Web.config:

<system.web>
 <machineKey configSource="Config\MachineKey.config"/>
 <httpRuntime targetFramework="4.5" maxRequestLength="20480"/>
 <globalization culture="en-CA" uiCulture="en-CA"/>
 <customErrors mode="Off"/>
 <compilation debug="true" targetFramework="4.5">
  <assemblies>
   <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, 
    PublicKeyToken=b77a5c561934e089"/>
   <add assembly="System.Web.Helpers, Version=2.0.0.0, Culture=neutral, 
    PublicKeyToken=31BF3856AD364E35"/>
  </assemblies>
 </compilation>
 <pages buffer="true" enableViewState="false">
  <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>

我在线搜索，其中一个答案告诉我名称空间应该相同.我做了，但是我没有任何改变.

I searched online and one of the answers told me the namespaces should be the same. I did but nothing changes to me.

确保目标版本.我的目标框架是4.5.我的MVC版本是5.2.0.0.其实我不明白这个解决方案.我试图将框架版本更改为4.5.1，而Visual Studio告诉我，我的版本实际上是4.5.我想我的目标版本还可以....(实际上我不理解此解决方案)

Make sure the target version. My target framework is 4.5. My MVC version is 5.2.0.0. Actually I am not understand this solution. I tried to change the framework version to 4.5.1 and the visual studio told me my version is actually 4.5. I guess my target version is OK....(Actually I do not understand this solution)

将@using System.Web.Optimization添加到~/Views/Shared/_Layout.cshtml.这使事情发生了.我的@Scripts.Render现在可以，但是@ViewBag下方仍然有一条红线.

Add @using System.Web.Optimization to ~/Views/Shared/_Layout.cshtml. This made something happens. My @Scripts.Render is OK now but @ViewBag still has a red line under it.

删除ComponentModelCache并重新启动Visual Studio.我正在使用VS2015.我尝试了，没有任何反应.

Delete ComponentModelCache and restart Visual Studio. I am using VS 2015. I tried, nothing happens.

稍后，我将更精确地执行这些解决方案，但我只想知道是否还有其他我错过并值得尝试的解决方案.非常感谢您的帮助！

I will perform these solutions more precisely later but I just want to know if there are other solutions I missed and worth trying. Thank you so much for the help !!

推荐答案

经过几个小时的挖掘.我解决了我的问题.我的解决方案1 ​​只能删除红线，当我运行Localhost调试时，它给了我500错误.

After a few hours digging. I solved my issue. My solution 1 can only remove the RED LINEs and it gave me 500 error When I run Localhost debug.

解决方案1:我只是在下面的~/Views/Web.config代码中将版本从3.0.0.0更改为2.0.0.0:

Solution 1: I simply changed the version from 3.0.0.0 to 2.0.0.0 in below code of ~/Views/Web.config:

  <configSections>
<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>

当我将所有版本都更改为2.0.0.0时，红线消失了，但出现500错误.这表示system.web.webPages.razor已正确加载到_Layout.cshtml.

When I changed all the versions to 2.0.0.0, the red lines went away but I have 500 error. Which means system.web.webPages.razor loaded to the _Layout.cshtml correctly.

据我了解，如果system.web.webPages.razor版本不正确，则不会加载以下我的~/Views/Web.config设置:

To my understanding, My below settings of ~/Views/Web.config did not load if the system.web.webPages.razor version is incorrect:

  <system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
  <namespaces>
    <add namespace="System.Web.Mvc" />
    <add namespace="System.Web.Mvc.Ajax" />
    <add namespace="System.Web.Mvc.Html" />
    <add namespace="System.Web.Routing" />
    <add namespace="System.Web.Optimization" />
  </namespaces>
</pages>
</system.web.webPages.razor>

解决方案2:然后，我检查了根Web.config中的以下部分代码:

Solution 2: Then, I checked below part of code in root Web.config:

 <connectionStrings configSource="Config\ConnectionStrings-dev.config" />
<appSettings>
  <add key="webpages:Version" value="2.0.0.0" />
  <add key="webpages:Enabled" value="false" />
  <add key="PreserveLoginUrl" value="true" />
  <add key="ClientValidationEnabled" value="true" />
  <add key="UnobtrusiveJavaScriptEnabled" value="true" />
</appSettings>

webpages:version是2.0.0.0.我将其更改为3.0.0.0以匹配~/Views/Web.config中的版本，重新启动Visual Studio，它可以正常工作.

the webpages:version is 2.0.0.0. I changed it to 3.0.0.0 to match the version in ~/Views/Web.config, restart visual studio, it worked without any issue.

此链接是帮助我的一个链接.

This link is the one helped me.

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