Visual Studio .net 核心标签助手不起作用-C#/.NET问题

Visual Studio .net core tag helpers not working(Visual Studio .net 核心标签助手不起作用)

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问题描述

好吧，让我们开始吧.我正在使用 Visual Studio 2015 和 ASP.NET 核心标签助手已经完全停止工作，不知道为什么，因为我没有改变任何东西.有一天我在工作，他们工作得很好，然后我第二天就来了，现在根本没有 ASP.NET 核心 Web 项目显示任何标签助手！?！我尝试创建一个全新的 ASP.NET 核心 mvc 项目，但它们也不在那里工作！！！我完全被卡住了，是否有一些设置可以在 Visual Studio 中完全关闭它们?

Well, lets get down to it. I'm using Visual Studio 2015 and ASP.NET core tag helpers have completely stopped working, no idea why as I've not changed anything. I was in work one day, they worked fine, then I came in the next day and now no ASP.NET core web project at all shows any tag helpers!?! I've tried creating a fresh new ASP.NET core mvc project and they don't work there either!!! I'm completely stuck, is there some setting somewhere that completely turns them off in Visual Studio?

请注意，根据大多数其他帖子，我已经检查了通常导致此问题的所有内容.我的 _ViewImports 有一行:-

Note that I've checked everything that usually causes this problem according to most other posts. My _ViewImports has the line:-

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

这是一个完整的 project.json 文件，来自我刚刚创建的一个新项目，并且根本没有进行任何更改:-

and here is a complete project.json file from a fresh project I just created and made NO changes to at all:-

{
  "dependencies": {
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.1",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Routing": "1.0.1",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0"
  },

  "tools": {
    "BundlerMinifier.Core": "2.0.238",
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },

  "frameworks": {
    "net452": { }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "**/*.cshtml",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install", "dotnet bundle" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

此外，所有 _Layout 视图和其他视图都完全失去了以前出现的突出显示.到目前为止我在互联网上没有找到其他人似乎有这个问题，不认为其他人有任何想法吗?

Also, all the _Layout views and other views have completely lost their highlighting that used to appear. No one else I've found on the internet so far seems to be having this problem, don't suppose anyone else has any ideas?

以下答案之一已经解决了新解决方案中的新项目的问题，但我仍然遇到现有解决方案/项目的问题.这是这些现有项目之一的项目文件内容，希望有人能在这里发现一些东西......

One of the answers below has solved this for new projects in a new solution but I'm still having problems with existing solutions/projects. Here's the project file contents from one of these existing projects, hopefully someone can spot something here...

{
  "dependencies": {
    "BundlerMinifier.Core": "2.2.306",
    "Configuration.Web": "1.0.0-*",
    "Microsoft.AspNetCore.Diagnostics": "1.1.0",
    "Microsoft.AspNetCore.Mvc": "1.1.0",
    "Microsoft.AspNetCore.Mvc.TagHelpers": "1.1.0",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Routing": "1.1.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
    "Microsoft.AspNetCore.StaticFiles": "1.1.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
    "Microsoft.Extensions.Configuration.Json": "1.1.0",
    "Microsoft.Extensions.Logging": "1.1.0",
    "Microsoft.Extensions.Logging.Console": "1.1.0",
    "Microsoft.Extensions.Logging.Debug": "1.1.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.1.0"
  },

  "tools": {
    "Microsoft.AspNetCore.Razor.Tools":  "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },

  "frameworks": {
    "net452": {
      "dependencies": {
        "Aristotle.Service": {
          "target": "project"
        },
        "Infrastructure": {
          "target": "project"
        }
      }
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "**/*.cshtml",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install", "dotnet bundle" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

我已将所有使用 NuGet 的软件包更新到最新版本...

I've updated all packages using NuGet to latest versions...