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 [英] Why can't I install Microsoft.VisualStudio.Web.CodeGeneration.Tools 2.0.1 via nuget? Asp.NET CORE 2.0.1

问题描述

我已按照 SO 并在ms docs 教程中:

I have added the reference to my project.csproj file as indicated on S.O. and in the ms docs tutorial:

<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，并且在管理nuget包中未安装CodeGeneration.Tools，手动安装会出现错误:打包还原失败.回滚"ContosoUniversity"的软件包更改.

running dotnet restore claims to succeed. But the dotnet aspnet-codegenerator command can't be found and in the manage nuget packages, the CodeGeneration.Tools isn't installed and manually installing gives the error: 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，其他均为2.0.1.(CodeGeneration.Design，CodeGeneration.Utils等...，并在程序包管理控制台中运行.安装程序包Microsoft.VisualStudio.Web.CodeGeneration.Tools 引发错误:

This appears to be from a version compatibility issue that I don't understand or know how to fix. I have installed in my dependencies Microsoft.NETCore.App 2.0.3 and Microsoft.NETCore.APP 2.0.3 and everything else is 2.0.1. (CodeGeneration.Design, CodeGeneration.Utils etc... and running at Package Management Console Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Tools Throws the error:

 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:找不到与命令"dotnet-aspnet-codegenerator"匹配的可执行文件

推荐答案

如果发生这种情况，该错误的解决方案是在项目文件夹目录中的dos命令提示符下而不是在程序包管理器控制台中运行该命令.然后，您可以在没有错误的情况下支撑页面，直到MS修复此错误为止.

If this happens, the solution to the error is to run the command at the dos command prompt in the project folder directory instead of in Package manager console. Then you can scaffold your pages without the error until MS fixes this bug.

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

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