1. Startup.cs add this service services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
2. Your view add inject @inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor
3. get your value

Code

@inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor
@{
    var id = HttpContextAccessor.HttpContext.Request.RouteValues["id"];

    if (id != null)
    {
        // parameter exist in your URL 
    }
 
    string navigation = await Navigation.WebNavigation(activeTab);
}

1. Startup.cs add this service services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
2. Your view add inject @inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor
3. get your value

Code

@inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor
@{
    var id = HttpContextAccessor.HttpContext.Request.RouteValues["id"];

    if (id != null)
    {
        // parameter exist in your URL 
    }
}