🚧 shell routes sample

ch04_Navigation/ex_ShellRoutes/AppShell.xaml

@@ -4,7 +4,7 @@
     xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
     xmlns:local="clr-namespace:ex_ShellRoutes"
-    Shell.FlyoutBehavior="Disabled"
+    Shell.FlyoutBehavior="Flyout"
     Title="ex_ShellRoutes">
 
     <ShellContent

ch04_Navigation/ex_ShellRoutes/AppShell.xaml.cs

@@ -5,6 +5,15 @@ public partial class AppShell : Shell
 	public AppShell()
 	{
 		InitializeComponent();
-		Routing.RegisterRoute("//newpage1", typeof(NewPage1));
+		Routing.RegisterRoute("page1", typeof(Page1));
+		Routing.RegisterRoute("//page1", typeof(Page1));
+		Routing.RegisterRoute("page1/page1_1", typeof(Page1_1));
+		Routing.RegisterRoute("page1/page1_2", typeof(Page1_2));
+		Routing.RegisterRoute("page1/page1_2/page1_2_1", typeof(Page1_2_1));
+		Routing.RegisterRoute("page1/page1_2/page1_2_2", typeof(Page1_2_2));
+		Routing.RegisterRoute("page1/page1_2/page1_2_3", typeof(Page1_2_3));
+		Routing.RegisterRoute("page1/page1_3", typeof(Page1_3));
+		Routing.RegisterRoute("page2", typeof(Page2));
+		Routing.RegisterRoute("//page1/page1_2/page1_2_2", typeof(Page1_2_2));
 	}
 }

ch04_Navigation/ex_ShellRoutes/MainPage.xaml

@@ -7,31 +7,34 @@
         <VerticalStackLayout
             Padding="30,0"
             Spacing="25">
-            <Image
-                Source="dotnet_bot.png"
-                HeightRequest="185"
-                Aspect="AspectFit"
-                SemanticProperties.Description="dot net bot in a race car number eight" />
 
             <Label
-                Text="Hello, World!"
+                Text="MainPage"
-                Style="{StaticResource Headline}"
+                Style="{StaticResource Headline}"/>
-                SemanticProperties.HeadingLevel="Level1" />
 
-            <Label
+            <Button
-                Text="Welcome to &#10;.NET Multi-platform App UI"
+                Text="GoTo page1" 
-                Style="{StaticResource SubHeadline}"
+                Clicked="GoToPage1"
-                SemanticProperties.HeadingLevel="Level2"
+                HorizontalOptions="Fill" />
-                SemanticProperties.Description="Welcome to dot net Multi platform App U I" />
+
+            <Button
+                Text="GoToAbsolute //page1" 
+                Clicked="GoToAbsolutePage1"
+                HorizontalOptions="Fill" />
+
+            <Button
+                Text="GoTo page2" 
+                Clicked="GoToPage2"
+                HorizontalOptions="Fill" />
 
             <Button
-                Text="GoToNewPage1" 
+                Text="GoTo page1/page1_2/page1_2_2" 
-                Clicked="GoToNewPage1"
+                Clicked="GoToPage1_2_2"
                 HorizontalOptions="Fill" />
 
             <Button
-                Text="PushNewPage2" 
+                Text="GoToAbsolute //page1/page1_2/page1_2_2" 
-                Clicked="PushNewPage2"
+                Clicked="GoToAbsolutePage1_2_2"
                 HorizontalOptions="Fill" />
         </VerticalStackLayout>
     </ScrollView>

ch04_Navigation/ex_ShellRoutes/MainPage.xaml.cs

@@ -7,14 +7,29 @@ public partial class MainPage : ContentPage
 		InitializeComponent();
 	}
 
-	private async void GoToNewPage1(object sender, EventArgs e)
+	private async void GoToPage1(object sender, EventArgs e)
 	{
-		await Shell.Current.GoToAsync("//newpage1");
+		await Shell.Current.GoToAsync("page1");
 	}
 
-	private async void PushNewPage2(object sender, EventArgs e)
+	private async void GoToAbsolutePage1(object sender, EventArgs e)
 	{
-		await Navigation.PushAsync(new NewPage2());
+		await Shell.Current.GoToAsync("//page1");
+	}
+
+	private async void GoToPage2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page2");
+	}
+
+	private async void GoToPage1_2_2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1/page1_2/page1_2_2");
+	}
+
+	private async void GoToAbsolutePage1_2_2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("//page1/page1_2/page1_2_2");
 	}
 }
 

ch04_Navigation/ex_ShellRoutes/NewPage1.xaml

@@ -13,11 +13,22 @@
             Text="GoToNewPage1" 
             Clicked="GoToNewPage1"
             HorizontalOptions="Fill" />
+        
+        <Button
+            Text="GoToAbsoluteNewPage1" 
+            Clicked="GoToAbsoluteNewPage1"
+            HorizontalOptions="Fill" />
 
         <Button
             Text="PushNewPage2" 
             Clicked="PushNewPage2"
             HorizontalOptions="Fill" />
+
+        <Button
+                Text="GoToNewPage4" 
+                Clicked="GoToNewPage4"
+                HorizontalOptions="Fill" />
+
         <Label Text="{Binding CurrentItem}"/>
         <Label Text="{Binding CurrentPage}"/>
         <Label Text="{Binding CurrentState}"/>

ch04_Navigation/ex_ShellRoutes/NewPage1.xaml.cs

@@ -9,12 +9,23 @@ public partial class NewPage1 : ContentPage
 	}
 
 	private async void GoToNewPage1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage1");
+	}
+
+	private async void GoToAbsoluteNewPage1(object sender, EventArgs e)
 	{
 		await Shell.Current.GoToAsync("//newpage1");
 	}
 
 	private async void PushNewPage2(object sender, EventArgs e)
 	{
+		//await Shell.Current.GoToAsync("newpage2");
 		await Navigation.PushAsync(new NewPage2());
 	}
+
+	private async void GoToNewPage4(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage1/newpage4");
+	}
 }

ch04_Navigation/ex_ShellRoutes/NewPage2.xaml

@@ -13,10 +13,21 @@
             Clicked="GoToNewPage1"
             HorizontalOptions="Fill" />
 
+        <Button
+            Text="GoToAbsoluteNewPage1" 
+            Clicked="GoToAbsoluteNewPage1"
+            HorizontalOptions="Fill" />
+
         <Button
             Text="PushNewPage2" 
             Clicked="PushNewPage2"
             HorizontalOptions="Fill" />
+        
+        <Button
+                Text="GoToNewPage3" 
+                Clicked="GoToNewPage3"
+                HorizontalOptions="Fill" />
+                
         <Label Text="{Binding CurrentItem}"/>
         <Label Text="{Binding CurrentPage}"/>
         <Label Text="{Binding CurrentState}"/>

ch04_Navigation/ex_ShellRoutes/NewPage2.xaml.cs

@@ -9,12 +9,23 @@ public partial class NewPage2 : ContentPage
 	}
 
 	private async void GoToNewPage1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage1");
+	}
+
+	private async void GoToAbsoluteNewPage1(object sender, EventArgs e)
 	{
 		await Shell.Current.GoToAsync("//newpage1");
 	}
 
 	private async void PushNewPage2(object sender, EventArgs e)
 	{
+		//await Shell.Current.GoToAsync("newpage2");
 		await Navigation.PushAsync(new NewPage2());
 	}
+
+	private async void GoToNewPage3(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage1/newpage3");
+	}
 }

ch04_Navigation/ex_ShellRoutes/NewPage3.xaml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.NewPage3"
+             Title="NewPage3">
+    <VerticalStackLayout>
+        <Label 
+            Text="Welcome to .NET MAUI!"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Button
+            Text="GoTo /NewPage4" 
+            Clicked="GoToNewPage4WithSlash"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="GoTo NewPage4" 
+            Clicked="GoToNewPage4WithoutSlash"
+            HorizontalOptions="Fill" />
+    </VerticalStackLayout>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/NewPage3.xaml.cs

@@ -0,0 +1,19 @@
+namespace ex_ShellRoutes;
+
+public partial class NewPage3 : ContentPage
+{
+	public NewPage3()
+	{
+		InitializeComponent();
+	}
+
+	private async void GoToNewPage4WithSlash(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("/newpage4");
+	}
+
+	private async void GoToNewPage4WithoutSlash(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage4");
+	}
+}

ch04_Navigation/ex_ShellRoutes/NewPage4.xaml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.NewPage4"
+             Title="NewPage4">
+    <VerticalStackLayout>
+        <Label 
+            Text="Welcome to .NET MAUI!"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+
+        <Button
+            Text="GoTo /NewPage5" 
+            Clicked="GoToNewPage5WithSlash"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="GoTo NewPage5" 
+            Clicked="GoToNewPage5WithoutSlash"
+            HorizontalOptions="Fill" />
+    </VerticalStackLayout>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/NewPage4.xaml.cs

@@ -0,0 +1,19 @@
+namespace ex_ShellRoutes;
+
+public partial class NewPage4 : ContentPage
+{
+	public NewPage4()
+	{
+		InitializeComponent();
+	}
+
+	private async void GoToNewPage5WithSlash(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("/newpage5");
+	}
+
+	private async void GoToNewPage5WithoutSlash(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage5");
+	}
+}

ch04_Navigation/ex_ShellRoutes/NewPage5.xaml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.NewPage5"
+             Title="NewPage5">
+    <VerticalStackLayout>
+        <Label 
+            Text="Welcome to .NET MAUI!"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+
+        <Button
+            Text="GoTo /NewPage4" 
+            Clicked="GoToNewPage4WithSlash"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="GoTo NewPage4" 
+            Clicked="GoToNewPage4WithoutSlash"
+            HorizontalOptions="Fill" />
+    </VerticalStackLayout>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/NewPage5.xaml.cs

@@ -0,0 +1,19 @@
+namespace ex_ShellRoutes;
+
+public partial class NewPage5 : ContentPage
+{
+	public NewPage5()
+	{
+		InitializeComponent();
+	}
+
+	private async void GoToNewPage4WithSlash(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("/newpage4");
+	}
+
+	private async void GoToNewPage4WithoutSlash(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("newpage4");
+	}
+}

ch04_Navigation/ex_ShellRoutes/Page1.xaml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1"
+             Title="Page1">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Label x:Name="labelNavStack"/>
+
+        <Button
+            Text="GoTo page1_1" 
+            Clicked="GoToPage1_1"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo page1/page1_2" 
+            Clicked="GoToPage1_2"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="GoTo /page1_3" 
+            Clicked="GoToPage1_3"
+            HorizontalOptions="Fill" />
+
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1.xaml.cs

@@ -0,0 +1,31 @@
+using System.Text;
+
+namespace ex_ShellRoutes;
+
+public partial class Page1 : ContentPage
+{
+	public Page1()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+
+	private async void GoToPage1_1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1_1");
+	}
+
+	private async void GoToPage1_2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1/page1_2");
+	}
+
+	private async void GoToPage1_3(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("/page1_3");
+	}
+}

ch04_Navigation/ex_ShellRoutes/Page1_1.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1_1"
+             Title="Page1_1">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1_1" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Label x:Name="labelNavStack"/>
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1_1.xaml.cs

@@ -0,0 +1,16 @@
+namespace ex_ShellRoutes;
+
+public partial class Page1_1 : ContentPage
+{
+	public Page1_1()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+
+	
+}

ch04_Navigation/ex_ShellRoutes/Page1_2.xaml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1_2"
+             Title="Page1_2">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1_2" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        
+        <Label x:Name="labelNavStack"/>
+        <Button
+            Text="GoTo page1_2_1" 
+            Clicked="GoToPage1_2_1"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo page1_3" 
+            Clicked="GoToPage1_3"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="Go back then to page1_3" 
+            Clicked="GoBackThenToPage1_3"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo page1_2" 
+            Clicked="GoToPage1_2"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo page1/page1_1" 
+            Clicked="GoToPage1_1"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo //page1/page1_2/page1_2_2" 
+            Clicked="GoToPage1_2_2"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo page1/page1_2/page1_2_2" 
+            Clicked="GoToPage1_2_2WithoutSlashes"
+            HorizontalOptions="Fill" />
+
+        <Button
+            Text="GoTo //page1" 
+            Clicked="GoToPage1"
+            HorizontalOptions="Fill" />
+        
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1_2.xaml.cs

@@ -0,0 +1,56 @@
+namespace ex_ShellRoutes;
+
+public partial class Page1_2 : ContentPage
+{
+	public Page1_2()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+
+	private async void GoToPage1_2_1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1_2_1");
+	}
+
+	private async void GoToPage1_3(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1_3");
+	}
+
+	private async void GoBackThenToPage1_3(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("../page1_3");
+	}
+
+	private async void GoToPage1_2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1_2");
+	}
+
+	private async void GoToPage1_1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1/page1_1");
+	}
+
+	private async void GoToPage1_2_2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("//page1/page1_2/page1_2_2");
+	}
+
+	private async void GoToPage1_2_2WithoutSlashes(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1/page1_2/page1_2_2");
+	}
+
+	private async void GoToPage1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("//page1");
+	}
+
+	
+}

ch04_Navigation/ex_ShellRoutes/Page1_2_1.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1_2_1"
+             Title="Page1_2_1">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1_2_1" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Label x:Name="labelNavStack"/>
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1_2_1.xaml.cs

@@ -0,0 +1,14 @@
+namespace ex_ShellRoutes;
+
+public partial class Page1_2_1 : ContentPage
+{
+	public Page1_2_1()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+}

ch04_Navigation/ex_ShellRoutes/Page1_2_2.xaml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1_2_2"
+             Title="Page1_2_2">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1_2_2" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+
+        <Label x:Name="labelNavStack"/>
+        <Button
+            Text="GoTo page1_2_1" 
+            Clicked="GoToPage1_2_1"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="Go back then To page1_2_3" 
+            Clicked="GoBackThenToPage1_2_3"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="Go Back" 
+            Clicked="GoBack"
+            HorizontalOptions="Fill" />
+        <Button
+            Text="Go Back Twice then to page2" 
+            Clicked="GoBackTwiceThenToPage2"
+            HorizontalOptions="Fill" />
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1_2_2.xaml.cs

@@ -0,0 +1,34 @@
+namespace ex_ShellRoutes;
+
+public partial class Page1_2_2 : ContentPage
+{
+	public Page1_2_2()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+
+	private async void GoToPage1_2_1(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("page1_2_1");
+	}
+
+	private async void GoBackThenToPage1_2_3(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("../page1_2_3");
+	}
+
+	private async void GoBack(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("..");
+	}
+
+	private async void GoBackTwiceThenToPage2(object sender, EventArgs e)
+	{
+		await Shell.Current.GoToAsync("../../page2");
+	}
+}

ch04_Navigation/ex_ShellRoutes/Page1_2_3.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1_2_3"
+             Title="Page1_2_3">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1_2_3" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Label x:Name="labelNavStack"/>
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1_2_3.xaml.cs

@@ -0,0 +1,14 @@
+namespace ex_ShellRoutes;
+
+public partial class Page1_2_3 : ContentPage
+{
+	public Page1_2_3()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+}

ch04_Navigation/ex_ShellRoutes/Page1_3.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page1_3"
+             Title="Page1_3">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page1_3" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Label x:Name="labelNavStack"/>
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page1_3.xaml.cs

@@ -0,0 +1,14 @@
+namespace ex_ShellRoutes;
+
+public partial class Page1_3 : ContentPage
+{
+	public Page1_3()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+}

ch04_Navigation/ex_ShellRoutes/Page2.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="ex_ShellRoutes.Page2"
+             Title="Page2">
+    <ScrollView>
+    <VerticalStackLayout
+            Padding="30,0"
+            Spacing="25">
+        <Label 
+            Text="Page2" Style="{StaticResource Headline}"
+            VerticalOptions="Center" 
+            HorizontalOptions="Center" />
+        <Label x:Name="labelNavStack"/>
+    </VerticalStackLayout>
+    </ScrollView>
+</ContentPage>

ch04_Navigation/ex_ShellRoutes/Page2.xaml.cs

@@ -0,0 +1,14 @@
+namespace ex_ShellRoutes;
+
+public partial class Page2 : ContentPage
+{
+	public Page2()
+	{
+		InitializeComponent();
+	}
+
+    protected override void OnNavigatedTo(NavigatedToEventArgs args)
+    {
+		labelNavStack.Text = Shell.Current.Navigation.NavigationStack.Aggregate("Stack", (total, next) => $"{total} > {next?.Title ?? ""}");
+	}
+}