private async Task ShowWindow(LaunchActivatedEventArgs e)
{
NavigationRootPage rootPage = Window.Current.Content as NavigationRootPage;
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootPage == null)
{
rootPage = new NavigationRootPage();
// Retrieve the root Frame to act as the navigation context and navigate to the first page
Frame rootFrame = (Frame)rootPage.FindName("rootFrame");
if (rootFrame == null)
{
throw new Exception("Root frame not found");
}
// Associate the frame with a SuspensionManager key.
SuspensionManager.RegisterFrame(rootFrame, "AppFrame");
// Set the default language
rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];
rootFrame.NavigationFailed += OnNavigationFailed;
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
// Restore the saved session state only when appropriate
try
{
await SuspensionManager.RestoreAsync();
}
catch (SuspensionManagerException)
{
//Something went wrong restoring state.
//Assume there is no state and continue
}
}
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page.
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
// Place the main page in the current Window.
Window.Current.Content = rootPage;
}
// Ensure the current window is active
Window.Current.Activate();
}
public NavigationRootPage()
{
this.InitializeComponent();
// LoadGroups();
Current = this;
RootFrame = rootFrame;
Loaded += NavigationRootPage_Loaded;
//Use the hardware back button instead of showing the back button in the page
if (ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons"))
{
Windows.Phone.UI.Input.HardwareButtons.BackPressed += (s, e) =>
{
if (rootFrame.CanGoBack)
{
rootFrame.GoBack();
e.Handled = true;
}
};
}
}
