VS2019 - 当前上下文中不存在 ViewBag [英] VS2019 - ViewBag does't exist in current context

问题描述

我已经安装了 VS 2019 for Mac 并开始构建应用程序.在我看来，我收到以下错误:当前上下文中不存在名称 ViewBag.名称 Layout 在当前上下文中不存在.

I have installed VS 2019 for Mac and started building an application. In my view, I get the following errors: The name ViewBag does not exist in the current context. The name Layout does not exist in the current context.

问题的原因可能是什么，我们如何解决这个问题?

What could be the cause for the issue and How could we resolve this?

推荐答案

您可能缺少 ../Views/Web.config 文件，因为您是从空的 ASP.NET 创建项目应用程序而不是使用 ASP.NET MVC 模板.或者您需要将特定于 MVC 的 Razor 配置添加到您的 web.config.

You might be missing the ../Views/Web.config file, because you created the project from an empty ASP.NET application instead of using an ASP.NET MVC template. Or You need to add MVC-specific Razor configuration to your web.config.

在您的 web.config 文件中，您应该添加以下几行:

In your web.config file you should add the following lines:

<configSections>
  <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
    <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
  </sectionGroup>
</configSections>

<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.Mvc" />
      <add namespace="System.Web.Mvc.Ajax" />
      <add namespace="System.Web.Mvc.Html" />
      <add namespace="System.Web.Routing" />
      <!-- Your namespace here -->
    </namespaces>
  </pages>
</system.web.webPages.razor>

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