private void NaviViewMain_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
{
if (FirstClick)
{
FirstClick = false;
FrameMain.Navigate(typeof(PageZajiao));
FrameMain.Navigate(typeof(PageParent));
if (NaviViewItemZajiao == sender.SelectedItem)
{
FrameMain.GoBack();
}
}
else
{
if (sender.SelectedItem == CurrentItem)
{
return;
}
if (NaviViewItemZajiao == sender.SelectedItem)
{
FrameMain.GoBack();
}
if (NaviViewItemParent == sender.SelectedItem)
{
FrameMain.GoForward();
}
}
CurrentItem = (NavigationViewItem)sender.SelectedItem;
}
private void BtnBack_Click(object sender, RoutedEventArgs e)
{
if (FrameMain.CanGoBack == true)
{
FrameMain.GoBack();
}
}
public MainPage()
{
InitializeComponent();
_updateElementsEvents.UpdateElementsEvent += () => { UpdateFormElements(); };
ChangeContentFrameEvents.ChangeContentFrameEvent +=
(Type newPage, MainWindowFrame mainWindowFrame) =>
{
if (newPage == null)
{
FrameMain.GoBack();
}
else
{
ChangeFrameEvents(newPage, mainWindowFrame);
}
};
}