How can I detect in which Blazor page my LayoutComponentBase is currently rendered?

I have Blazor pages that are structured like so:

Index.razor:

@page "/"@layout PageTopComponents<div><!-- html stuff here --></div>@code {    // ...}

Results.razor:

@page "/results"@layout PageTopComponents<div><!-- html stuff here --></div>@code {    // ...}

PageTopComponents.razor:

@inherits LayoutComponentBase<div><Component1 /></div><div><Component2 /></div><div><Component3 /></div><div><Component4 /></div><div><Component5 /></div>

In, say, Component3, I need to know whether or not I am in "/" or "/results" so I can display different information that is page specific.

I have a service with a bool that I can call to set or unset the boolean depending on which page I am on.

MyService.cs:

public bool showData_A { get; set; } = false;public bool showData_B { get; set; } = false;public bool showData_C { get; set; } = false;public bool showData_D { get; set; } = false;

And I can successfully set it like so:

[Inject]MyService myService { get; set; }protected override async Task OnInitializedAsync() {    myService.showData_B = true;}

However, I believe the PageTopComponents are getting loaded before the OnInitializedAsync is being called.

So, How can I get this to work?