Aspnetcore: Blazor Webassembly Identity Scaffolding Not Working

[rxelizondo]

Create a new Blazor app using the Blazor WebAssembly App template with ASP.NET Core Hosted selected and Individual User Accounts authentication.

After the project is loaded add the identity scaffolding by right clicking the server project and selecting Add New Scaffolding Item… and select all files.

If you try to run the project, you will get a compile error due to missing using Microsoft.AspNetCore.Identity. If you fix that issue and follow the identity scaffolding read-me the app does not show correctly.

[PlattevilleWS]

Funny, I was just doing this same thing for my project. I ended up not doing anything from the read-me, because it was incorrect as you say. Just leaving the Startup.cs in it's original state seemed to work just fine (and fixing the missing Microsoft.AspNetCore.Identity using statement in RegisterConfirmation.cshtml.cs, as you mentioned).

That being said, the next issue I had was due to the Scaffolding site.css overriding the Client project's site.css, presumably because in a static file conflict it takes the file from the server project, causing the actual web assembly app to look wrong. After renaming one of them it ended up being fine, but this is another potential problem with the Scaffolding as it is.

[javiercn]

@rxelizondo thanks for contacting us.

We are aware of these issues and I believe we are working on smoothing out the experience.

/cc: @danroth27

[jvallejoa]

Yes, this is the same bug open in several threads. No way to scaffold accounts items, it corrupts all the entire page, I share the windows result. the message in console is DOMException-EntryAlreadyExists

@danroth27

Thanks

@danroth27

[bstorage]

After updating AspNetCore.Identity (2.2.0) and many other packages (not sure which are relevant here) I can no longer use scaffolding at all on Blazor WebAssembly, including on projects where I have used it previously. On right click of project and selecting Add/New scaffolded Item, I get an error titled "Import" having text: "'Microsoft.WebTools.Scaffolding.Core.ScaffolderFactory.FactoryConfigEvaluator' could not be satisfied."

[filipgoris]

Exactly the same issue here, but on ASP.Net Core Web Applications:

• Create a new Project
• Select ASP.Net Core Web Application
• Select ASP.Net Core 3.1
• On the newly created project: Add > New Scaffolded Item...
  brings up the error mentioned by @bstorage:
  "Import 'Microsoft.WebTools.Scaffolding.Core.ScaffolderFactory.FactoryConfigEvaluator' could not be satisfied."

Visual Studio 2019 Version 16.7.0 Preview 2.0
Templates 3.1.3

[danroth27]

@bstorage @filipgoris It sounds like you're hitting a separate issue from what is described in this issue. Could you please submit a VS feedback issue for the problem you are seeing?

[danroth27]

@rxelizondo The compilation and styling issues you described should now be fixed. There are still some other issues with using the Identity scaffolder with Blazor WebAssembly projects, but we are tracking those with separate issues: https://github.com/dotnet/Scaffolding/issues/1325

[Rick-Anderson]

@bstorage @filipgoris I reproduced this problem with VS 16.7.0 Preview 3.1 and it's reported in this VS feedback problem

A fix is pending.