Authentication - Scaffolding Identity - The type or namespace name 'Areas' does not exist in the namespace

Question

Creating a basic tutorial project using authorization. The following error messages...

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GitHub: https://github.com/DeanEverhart/ContosoUniversityAuthentication7 Tutorial(s): https://learn.microsoft.com/en-us/aspnet/core/security/authentication/identity?view=aspnetcore-6.0&tabs=visual-studio#scaffold-register-login-logout-and-registerconfirmation https://learn.microsoft.com/en-us/aspnet/core/security/authentication/scaffold-identity?view=aspnetcore-6.0&tabs=visual-studio#migrations Environment: Net Core 6, Visual Studio Community 2022 (64 bit), WIndows 11

Steps

1. In the Authentication type input, select Individual User Accounts.

2. Update-Database

3. Run the app and register a user. Depending on your screen size, you might need to select the navigation toggle button to see the Register and Login links.

4. Configure Identity services
https://learn.microsoft.com/en-us/aspnet/core/security/authentication/identity?view=aspnetcore-6.0&tabs=visual-studio#configure-identity-services

5. PM> Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Design -Version 6.0.11

6. Scaffolding Identity into a Razor project with authorization
https://learn.microsoft.com/en-us/aspnet/core/security/authentication/scaffold-identity?view=aspnetcore-6.0&tabs=visual-studio#scaffold-identity-into-a-razor-project-with-authorization

Add New Scaffolded Item at the project level / select Identity / Add

Options:

     1. Existing Context Class

     Select Existing Views/_Layout
     To use your existing data context, select at least one file to override.

     2. Separate Context Class Created at Areas.Identity.Data

     Select Existing Views/_Layout
     Select [+] to create new user context
     Name: ContosoUniversityAuthenticationUserContext
     [Add}


7. Install-Package Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore -Version 6.0.11

I got the error message after the 6th. step (above). I was able to perform seventh step but the next step is migration which I won't be able to do without resolving the error messages (above).

Not sure if this is relevant, but there are two _ViewImports.cshtml pages.

Answer 1

Hi @Dean Everhart

The type or namespace name 'Areas' does not exist in the namespace

To this issue, you can try to use the following steps to fix it.

1. Download your project from the Github and open it.
2. In the Areas folder, remove the reference from the _ViewImports.cshtml page:

              @using ContosoUniversityAuthentication.Areas.Identity
              @using ContosoUniversityAuthentication.Areas.Identity.Pages
   

   and

              @using ContosoUniversityAuthentication.Areas.Identity.Pages.Account
   

3. Clean and rebuild the project.
4. Delete the Areas folder in the project.
5. Clean and rebuild the project.
6. Right click the project and add an "Areas" folder.
7. Right click the Areas folder, select "Add" => "New Scaffolded Item..." option, then select "Identity" and click the "Add" button.
8. In the popup window select the Identity page and Dbcontext, like this:
9. Click the "Add" button, then you can check the "_ViewImports.cshtml" file, the error disappears, you can find the Areas.

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Best regards,
Dillion