aspnet-codegenerator: No code generators available, Even after adding Microsoft.VisualStudio.Web.CodeGeneration.Design - asp.net-core

Question

Unable to generate scaffolding using aspnet-codegenerator, below is what I tried:
Created an ASP.Net RazorPages application using
dotnet new webapp
Did a dotnet build
Installed dotnet-aspnet-codegenerator using
dotnet tool install --global dotnet-aspnet-codegenerator --version 3.1.4
Ran dotnet aspnet-codegenerator --help
It says: No code generators are available in this project.Add Microsoft.VisualStudio.Web.CodeGeneration.Design package to the project as a NuGet package reference.
Added the package mentioned in step 4 using
dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
Package added is:
<ItemGroup> <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.4" /> </ItemGroup>
Again ran: dotnet build
Final-Step
Ran dotnet aspnet-codegenerator --help
Again it says: No code generators are available in this project.Add Microsoft.VisualStudio.Web.CodeGeneration.Design package to the project as a NuGet package reference.
.Net core installed version: 3.1.401
Os: Ubuntu 20.04

Answer 1

This is already a few month old, but I ran into it recently for all my projects.
In case someone else lands on this page, the solution in my case(MAC OS), was to uninstall and reinstall dotnet-aspnet-codegenerator.
Run in terminal:
dotnet tool uninstall --global dotnet-aspnet-codegenerator
dotnet tool install --global dotnet-aspnet-codegenerator --version 3.1.4

Answer 2

I have same problem when upgrade from .net core 3.1.4 to 5.0.1.
My solution:
update global tools:
dotnet tool install --global dotnet-aspnet-codegenerator
dotnet tool update --global dotnet-aspnet-codegenerator
dotnet tool install --global dotnet-ef
dotnet tool update --global dotnet-ef
add/update links to packages
dotnet remove package Microsoft.VisualStudio.Web.CodeGeneration.Design
dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
dotnet add package Microsoft.EntityFrameworkCore.Design
Replace string netcoreapp3.1.4 to net5.0 in .csproj and launch.json files
Clear directories
bin
obj
Rebuild project
Finally run:
dotnet aspnet-codegenerator --help
If all fine it will show available generators.

Answer 3

The root cause of this problem has been described in this issue as the .NET code expecting a case-insensitive filesystem which fails on a Linux host.
A suggested workaround would be to temporarily mount you ~/.nuget directory on a vfat filesystem.
To do so create a dummy file holding the filesystem
dd if=/dev/zero of=/tmp/mynuget bs=1024k count=2000
mkfs.vfat /tmp/mynuget
and then mount it
sudo mount -o uid=myuser,gid=myuser -t vfat /tmp/mynuget /home/myuser/.nuget
and use it
dotnet restore
dotnet aspnet-codegenerator ...

Answer 4

I test your command,and when I do this dotnet tool install --global dotnet-aspnet-codegenerator --version 3.1.4,I can get
and then Ran dotnet aspnet-codegenerator --help,I get the same message No code generators are available in this project.Add Microsoft.VisualStudio.Web.CodeGeneration.Design package to the project as a NuGet with you,
but when I do the following,I can run without the message:
I think maybe the package is not added correctly,you can try to remove and add it again.
dotnet remove package Microsoft.VisualStudio.Web.CodeGeneration.Design
dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design

Answer 5

I have found the SOLUTION to this issue:
The newest versions are giving some problems, so you will have to downgrade the version of the sdk to the 3.1.3 by writing this command on the terminal:
sudo apt install dotnet-sdk-3.1=3.1.301-1
After that you will need to install the following:
dotnet tool install --global dotnet-aspnet-codegenerator --version 3.1.3
After that you will need to add the right Web.CodeGeneration.Design Package by writing this on the terminal:
sudo apt install dotnet-sdk-3.1=3.1.301-1
dotnet tool install --global dotnet-aspnet-codegenerator --version 3.1.3
That has worked for me!!