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

我已按照S.O.和ms文档tutorial中的说明添加了对project.csproj文件的引用：

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

运行dotnet restore声称成功。但是找不到dotnet aspnet-codegenerator命令，并且在manage nuget包中，CodeGeneration.Tools没有安装，手动安装会给出错误： Package restore failed. Rolling back package changes for 'ContosoUniversity'.

这似乎来自我不了解或不知道如何修复的版本兼容性问题。我在我的依赖项中安装了Microsoft.NETCore.App 2.0.3 和Microsoft.NETCore.APP 2.0.3，其他一切都是2.0.1。 （CodeGeneration.Design，CodeGeneration.Utils等...并在包管理控制台Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Tools运行引发错误：

 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

将所有内容降级为2.0.0允许我在Nuget中安装CodeGeneration.Tools但我仍然收到错误：dotnet : No executable found matching command "dotnet-aspnet-codegenerator"

Answer 1

如果发生这种情况，错误的解决方案是在项目文件夹目录中的dos命令提示符下运行命令，而不是在程序包管理器控制台中运行。然后，您可以在没有错误的情况下构建页面，直到MS修复此错误。

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

Answer 2

在Nuget软件包管理器中转到“管理解决方案的Nuget软件包”，然后

在包装中 。

添加以下详细信息： 名称 “ nuget.org”

来源 “ https://api.nuget.org/v3/index.json”