Any ideas why "GoToAsync" doesn't work in AppShell.cs? - xamarin.forms

Question

Register detail page routes
AppShell.cs
public partial class AppShell : Xamarin.Forms.Shell
{
public AppShell(string message)
{
InitializeComponent();
Routing.RegisterRoute(nameof(ItemDetailPage), typeof(ItemDetailPage));
Routing.RegisterRoute(nameof(NewItemPage), typeof(NewItemPage));
Routing.RegisterRoute("LoginPage", typeof(LoginPage));
if (message != "main") {
int itemid = Int32.Parse(message);
var item = App.Database.GetItemAsyncId(itemid).Result;
var itemValue = new Models.Item
{
Id = item.Id,
Description = item.Description,
Text = item.Text
};
OnItemSelected(itemValue);
}
}
public async void OnItemSelected(Item item)
{
await Shell.Current.GoToAsync("LoginPage");
//Shell.Current.GoToAsync($"{nameof(ItemDetailPage)}?{nameof(ItemDetailViewModel.ItemId)}={item.Id}");
}}
When I launch the application on the emulator, the application should launch the pages:
"AboutPage" - starts;
"LoginPage" - it does not start.
"LoginPage" should load using
Shell.Current.GoToAsync("LoginPage");
The editor does not show errors.
is navigationStack
<FlyoutItem x:Name="ItemsPage" Icon="icon_feed.png">
<ShellContent Route="ItemsPage" ContentTemplate="{DataTemplate local:ItemsPage}" />
</FlyoutItem>
<FlyoutItem x:Name="About" Icon="icon_about.png">
<ShellContent Route="AboutPage" ContentTemplate="{DataTemplate local:AboutPage}" />
</FlyoutItem>
<!-- When the Flyout is visible this will be a menu item you can tie a click behavior to -->
<MenuItem Text="Logout" StyleClass="MenuItemLayoutStyle" Clicked="OnMenuItemClicked">
</MenuItem>
<!--
TabBar lets you define content that won't show up in a flyout menu. When this content is active
the flyout menu won't be available. This is useful for creating areas of the application where
you don't want users to be able to navigate away from. If you would like to navigate to this
content you can do so by calling
await Shell.Current.GoToAsync("//LoginPage");
-->
<TabBar>
<ShellContent Route="LoginPage" ContentTemplate="{DataTemplate local:LoginPage}" />
</TabBar>

Answer 1

Does your method get called?
What is the value of the message variable? Check if the if (message != "main") is true sometimes
It will only happen on the constructor.
[Edit]
To navigate a page of a Shell inside the constructor, you will have to replace "Shell.Current.GoToAsync('LoginPage')" with "this.GoToAsync('LoginPage')"
At the moment of the instance, the created Shell is not the "Current" shell of the application