[Parameter] is necessary also for [SupplyParameterFromQuery]

[JZO001]

Description

In the section "Query strings", information is missing. "SupplyParameterFromQuery" does not stand alone, [Parameter] attribute is also necessary. Without it, the parameter from the query will not be processed.

Page URL

https://learn.microsoft.com/en-us/aspnet/core/blazor/fundamentals/routing?view=aspnetcore-8.0

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/blazor/fundamentals/routing.md

Document ID

b6cb2574-6326-a40d-0b6c-d1661328e828

Article author

@guardrex

[github-actions]

🎉🥳 Happy New Year! 💃🕺

A green dinosaur 🦖 will be along shortly to assist. Stand-by ........

[guardrex]

Not strictly necessary AFAIK. Let's ping @MackinnonBuck ... Should the guidance add a line that says something like ...

If the query string parameter must also serve as a [component parameter](xref:blazor/components/index#component-parameters), also include the [`[Parameter]` attribute](xref:Microsoft.AspNetCore.Components.ParameterAttribute):

... and then I can add a little example like ...

[Parameter]
[SupplyParameterFromQuery]
public string? Filter { get; set; }

[JZO001]

On my side - using .NET 7.0.15 - on a normal page (not a component), I used the "SupplyParameterFromQuery" to get an int? parameter from query. It does not work, and I had to google for a while to figure out the reason. Than I spotted out, in other examples, there is the "Parameter" also. After added it to my property into my page, than it started to work fine.