为什么我不能通过nuget安装Microsoft.VisualStudio.Web.CodeGeneration.Tools 2.0.1？ASP.NET CORE 2.0.1

Question

我已经按照SO和ms docs 教程中的指示将引用添加到我的project.csproj文件中：

<ItemGroup>
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.1" />
  </ItemGroup>

运行dotnet restore索赔成功。但是dotnet aspnet-codegenerator找不到该命令，并且在manage nuget软件包中，未安装CodeGeneration.Tools，手动安装会出现错误： Package restore failed. Rolling back package changes for 'ContosoUniversity'.

---

这似乎是由于我不了解或不知道如何解决的版本兼容性问题造成的。我已经在我的依赖项中安装了Microsoft.NETCore.App 2.0.3和Microsoft.NETCore.APP 2.0.3，其他所有版本都是2.0.1。（CodeGeneration.Design，CodeGeneration.Utils等...并在程序包管理控制台中运行Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Tools引发错误：

 GET https://api.nuget.org/v3/registration3-gz-semver2/microsoft.visualstudio.web.codegeneration.tools/index.json
  OK https://api.nuget.org/v3/registration3-gz-semver2/microsoft.visualstudio.web.codegeneration.tools/index.json 166ms
Restoring packages for C:\Users\sticker592\Documents\Visual Studio 2017\Projects\ContosoUniversity\ContosoUniversity\ContosoUniversity.csproj...
Install-Package : Detected package downgrade: Microsoft.NETCore.App from 2.0.3 to 2.0.0. Reference the package directly from the project to 
select a different version. 
 ContosoUniversity -> Microsoft.VisualStudio.Web.CodeGeneration.Tools 2.0.1 -> Microsoft.NETCore.App (>= 2.0.3) 
 ContosoUniversity -> Microsoft.NETCore.App (>= 2.0.0)
At line:1 char:1
+ Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Tools
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand

Install-Package : Package restore failed. Rolling back package changes for 'ContosoUniversity'.
At line:1 char:1
+ Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Tools
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand

---

将所有内容降级到2.0.0允许我在Nuget中安装CodeGeneration.Tools，但仍然出现错误： dotnet : No executable found matching command "dotnet-aspnet-codegenerator"

Answer 1

如果发生这种情况，解决该错误的方法是在项目文件夹目录中的 dos 命令提示符下运行该命令，而不是在包管理器控制台中运行该命令。然后你就可以搭建你的页面而不会出现错误，直到微软修复这个错误。

证明：

C:\Users\username\Documents\Visual Studio 2017\Projects\ContosoUniversity\ContosoUniversity>dotnet aspnet-codegenerator razorpage -m Student -dc SchoolContext -udl -outDir Pages\Students --referenceScriptLibraries
Building project ...
Finding the generator 'razorpage'...
Running the generator 'razorpage'...
Attempting to compile the application in memory.
Attempting to figure out the EntityFramework metadata for the model and DbContext: 'Student'
info: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[0]
      User profile is available. Using 'C:\Users\username\AppData\Local\ASP.NET\DataProtection-Keys' as key repository and Windows DPAPI to encrypt keys at rest.
info: Microsoft.EntityFrameworkCore.Infrastructure[100403]
      Entity Framework Core 2.0.0-rtm-26452 initialized 'SchoolContext' using provider 'Microsoft.EntityFrameworkCore.SqlServer' with options: None
Added Razor Page : \Pages\Students\Create.cshtml
Added PageModel : \Pages\Students\Create.cshtml.cs
Added Razor Page : \Pages\Students\Edit.cshtml
Added PageModel : \Pages\Students\Edit.cshtml.cs
Added Razor Page : \Pages\Students\Details.cshtml
Added PageModel : \Pages\Students\Details.cshtml.cs
Added Razor Page : \Pages\Students\Delete.cshtml
Added PageModel : \Pages\Students\Delete.cshtml.cs
Added Razor Page : \Pages\Students\Index.cshtml
Added PageModel : \Pages\Students\Index.cshtml.cs
RunTime 00:00:15.33