I have a UWP app which has 3 pages and third page contains a frame tag which loads multiple frames. Lets say I navigate to page 1->page 2-> Page 3->Frame 1-> Frame 2->Frame 3. If I press back button from frame 3 and 2 it goes to page 2 instead of frame 2 and frame 1 respectively. I have a common method to handle the back button event and it takes the root frame which is same for frame 1,2 and 3 which is page 3 and goes back to its back page page 2. So how can I go back to frames instead of the root page back. Below is the common back method I have in App.xaml.cs. Please help.
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
Frame rootFrame = Window.Current.Content as Frame;
Windows.UI.Core.SystemNavigationManager.GetForCurrentView().BackRequested += App_BackRequested;
}
}
private void App_BackRequested(object sender, Windows.UI.Core.BackRequestedEventArgs e)
{
e.Handled = On_BackRequested();
}
private bool On_BackRequested()
{
Frame rootFrame = Window.Current.Content as Frame;
if (rootFrame.CanGoBack)
{
rootFrame.GoBack();
return true;
}
return false;
}
public HomeView()
{
this.InitializeComponent();
var vm = new HomeViewModel(new UserService(), new SubscriptionService(), new TransactionService(),new GameService());
this.DataContext = vm;
WalletBtn.Foreground = new SolidColorBrush(Colors.White);
PaymentGrid = BuyModal;
//PowerPassGameListGrid = PowerPassGameGrid;
// SystemNavigationManager.GetForCurrentView().BackRequested += HomePage_BackRequested;
PointBalance = wallet;
//QueuedGames = QueueGame;
//PowerPassSubscriptionGrid = PowerPass;
SubmitPopUp = SuccessPopUp;
RecentActivityGrid = RecentActivityModel;
CurrentlyPickedPopUp = GamePickUp;
PowerUpNavigationGrid = NavigationGrid;
}
private void Page_Loaded(object sender, RoutedEventArgs e)
{
string firstName = (string)ApplicationData.Current.LocalSettings.Values["FirstName"];
string lastName = (string)ApplicationData.Current.LocalSettings.Values["LastName"];
if (firstName != null && lastName != null)
{
welcomeMessage.Text = "Hi, " + firstName;
}
}
public void MyWalletButton_Click(object sender, RoutedEventArgs e)
{
PowerPassBtn.Foreground = new SolidColorBrush(Colors.Gray);
WalletBtn.Foreground = new SolidColorBrush(Colors.White);
}
public void PowerPassButton_Click(object sender, RoutedEventArgs e)
{
PowerPassSelection();
}
//private void HomePage_BackRequested(object sender, BackRequestedEventArgs e)
//{
// e.Handled = true;
// this.Frame.Navigate(typeof(LoginUsernameView));
//}
private void ButtonGotFocus(object sender, RoutedEventArgs e)
{
(sender as Button).Background = new SolidColorBrush(Colors.Green);
}
private void ButtonLostFocus(object sender, RoutedEventArgs e)
{
(sender as Button).Background = new SolidColorBrush(Colors.Transparent);
}
private void QueueButtonGotFocus(object sender, RoutedEventArgs e)
{
(sender as Button).Background = new SolidColorBrush(Colors.DeepSkyBlue);
}
private void QueueButtonLostFocus(object sender, RoutedEventArgs e)
{
(sender as Button).Background = new SolidColorBrush(Colors.Transparent);
}
private static T FindParent<T>(DependencyObject dependencyObject) where T : DependencyObject
{
var parent = VisualTreeHelper.GetParent(dependencyObject);
if (parent == null) return null;
var parentT = parent as T;
return parentT ?? FindParent<T>(parent);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
NavigationParameterDTO parameter = e.Parameter as NavigationParameterDTO;
if (parameter != null)
{
if (parameter.FrameName == "WelcomeView")
{
HomeViewModel vm = this.DataContext as HomeViewModel;
vm.PowerPassWelcomeFrame.Execute(null);
PowerPassSelection();
}
else if(parameter.FrameName == "CheckOut")
{
HomeViewModel vm = this.DataContext as HomeViewModel;
vm.PowerPassGameCheckOutMethod.Execute(null);
PowerPassSelection();
}
else if(parameter.FrameName== "SignUp")
{
HomeViewModel vm = this.DataContext as HomeViewModel;
vm.PowerPassFrame.Execute(null);
PowerPassSelection();
}
else
{
HomeViewModel vm = this.DataContext as HomeViewModel;
vm.PowerPassHomeFrame.Execute(null);
PowerPassSelection();
}
}
}
Xaml
<Button Style="{StaticResource PowerUpButtonStyle}" x:Uid="Profile" FontSize="36" Margin="0,60,0,0" Name="SettingsBtn" XYFocusDown="{x:Bind SettingsBtn}" FontFamily="Segoe Pro" Foreground="Gray" FocusVisualPrimaryThickness="0,0,0,3" FocusVisualMargin="10,0">
<Button.Background>
<SolidColorBrush Opacity="0"/>
</Button.Background>
<Button.Resources>
<ResourceDictionary>
<ResourceDictionary.ThemeDictionaries>
<ResourceDictionary x:Key="Light">
<SolidColorBrush x:Key="ButtonForegroundPointerOver" Color="White"/>
</ResourceDictionary>
</ResourceDictionary.ThemeDictionaries>
</ResourceDictionary>
</Button.Resources>
</Button>
</StackPanel>
<Image Source="/Assets/Images/PURlogo_large.png" HorizontalAlignment="Left" Margin="70,950" Width="212" Height="78"/>
</Grid>
</StackPanel>
<Frame x:Name="MainFrame" Grid.Column="1" Content="{Binding FrameData,Mode=OneWay}" >
</Frame>
<Grid Background="Red" Visibility="Collapsed" x:Name="testgrid">
<TextBlock Text="hello world"></TextBlock>
</Grid>
</Grid>
