public void GoBack()
{
if (CurrentItem != null)
{
ForwardStack.Push(CurrentItem);
}
if (BackStack.Count > 0)
{
CurrentItem = BackStack.Pop();
}
OnStackChanged();
}
private async void BtnBack_Click(object sender, RoutedEventArgs e)
{
var item = BackStack.Pop();
if (BackStack.Count == 0)
{
IsbtnBackEnabled = false;
}
ForwardStack.Push(LastSearch);
IsbtnForwardEnabled = true;
tbID.Text = item;
await StartFinding();
}
private void HandleContentNavigating(object sender, NavigatingCancelEventArgs e)
{
if (IsNavigating)
{
return;
}
IsNavigating = true;
// Choose the name of the transition based on the e.ExtraData that was passed to NavigationService.Navigate().
// If the data is a string, we'll try to find a matching transition by that name.
if (e.ExtraData is ResolvedNavigationRequest)
{
var transitionName = ((ResolvedNavigationRequest)e.ExtraData).RouteValues.GetOrDefault <string>("Transition");
CurrentTransition = transitionRegistry.Get(transitionName);
}
else if (e.ExtraData is string && transitionRegistry.Get(e.ExtraData.ToString()) != null)
{
var transitionName = e.ExtraData.ToString();
CurrentTransition = transitionRegistry.Get(transitionName);
}
else
{
CurrentTransition = null;
}
// Keep a record of back/forward navigation and use this to select the reverse transitions.
if (e.NavigationMode == NavigationMode.New)
{
BackStack.Push(CurrentTransition);
}
else if (e.NavigationMode == NavigationMode.Back)
{
var original = BackStack.Pop();
ForwardStack.Push(original);
var reverseTransition = original == null ? null : transitionRegistry.Get(original.Reverse);
CurrentTransition = reverseTransition;
}
else if (e.NavigationMode == NavigationMode.Forward)
{
CurrentTransition = ForwardStack.Pop();
BackStack.Push(CurrentTransition);
}
}