Upgraded view components sample projects to 2.2 instead of 2.0 and renewed seeding

[shadialnamrouti]

Fixes #10657

[guardrex]

The 2.2 updates should include the layout script updates. Was there an Error page (Error.cshtml.cs)? ... that needs a touch, too, if it's present in the sample. There are some appsettings file changes.

We decided to not sweat the cookie validation (CookiePolicyOptions and UseCookiePolicy) and the enforcement of HTTPS with HSTS, so that's fine if it wasn't there before.

[guardrex]

The Error page is static, so that's ok.

The scripts and styles in Shared/_Layout.cshtml ... you could update those, but I gravely doubt that it will matter all that much.

[guardrex]

@shadinamrouti, there's no migration required for OnModelCreating to seed the dB, correct?

[shadialnamrouti]

@guardrex, I suggest to merge my PR because it is an identical working mirror of the current samples with the only differences being:

1. Targeting the 2.2 libraries.
2. Using the OnModelCreating for seeding.

Regarding your comments:
I. Additional files:

The original samples do not contain any of the following (it seems on purpose to concentrate on the View Component topic):

• Views: The _layout, the _ViewImports, the Error View, navigation
• Settings: appsettings.json, HTS, cookie policy
• Static files: www root, site.css, site.js and the libraries

Notes:

• None of the above files is mandatory to have a working sample.
• Avoiding the above at this time is recommended to make the samples compatible with the documentation on the page.
• Anyway, if you recommend adding the above, I can manage this in a subsequent PR. What do you think?

II. OnModelCreating() to seed in-memory DB's

Yes @guardrex , no migration is required because the used database is in-memory and thus migration is not possible in this context, however, to invoke OnModelCreating() an additional line is added in the constructor of the ToDo Controller which is:

public ToDoController(ToDoContext context)
{
            _ToDoContext = context;

            //This line is used to invoke OnModelCreating() for in-memory databases 
            _ToDoContext.Database.EnsureCreated();
}

For more info about EnsureCreated() see this related issue:
dotnet/efcore#11666

[guardrex]

Targeting the 2.2 libraries.

We don't retain the prior patch release sample; so yes, we'd drop 2.1 for 2.2. 👍

if you recommend adding the above

I would just update the scripts to match the 2.2 template to take advantage of any security/bug fixes. I gravely doubt that it's a big deal in a sample like this. I wouldn't do anything else for this one.

no migration is required

🎉 🍻 ❤️ 👍

There's a seeding technique that does require a migration, and I guess ur saying that for a data store not in-memory that this approach would require a migration? A migration isn't the most fun imo. I want to pull down a sample, fire it up, and have it ✨ Just Work!™️ ✨ ... no ceremony ... no distractions.

Although it's no biggie to do a migration, I just like the idea of not doing one ... LazyRex 😀

Approval

Given the seeding approach here, I defer to @Rick-Anderson and the team to sign off on this.

[Rick-Anderson]

@shadinamrouti nice work.