private void ClosePickerPage()
{
// Unhook from events
if (null != _frame)
{
_frame.Navigated -= OnFrameNavigated;
_frame.NavigationStopped -= OnFrameNavigationStoppedOrFailed;
_frame.NavigationFailed -= OnFrameNavigationStoppedOrFailed;
// Restore host page transitions for the completed "popup" navigation
UIElement frameContentWhenOpenedAsUIElement = _frameContentWhenOpened as UIElement;
if (null != frameContentWhenOpenedAsUIElement)
{
TransitionService.SetNavigationInTransition(frameContentWhenOpenedAsUIElement, _savedNavigationInTransition);
_savedNavigationInTransition = null;
TransitionService.SetNavigationOutTransition(frameContentWhenOpenedAsUIElement, _savedNavigationOutTransition);
_savedNavigationOutTransition = null;
}
_frame = null;
_frameContentWhenOpened = null;
}
// Commit the value if available
if (null != _dateTimePickerPage)
{
if (_dateTimePickerPage.Value.HasValue)
{
Value = _dateTimePickerPage.Value.Value;
}
_dateTimePickerPage = null;
}
}
private void OpenPickerPage()
{
if (null == PickerPageUri)
{
throw new ArgumentException("PickerPageUri property must not be null.");
}
if (null == _frame)
{
// Hook up to necessary events and navigate
_frame = Application.Current.RootVisual as PhoneApplicationFrame;
if (null != _frame)
{
_frameContentWhenOpened = _frame.Content;
// Save and clear host page transitions for the upcoming "popup" navigation
UIElement frameContentWhenOpenedAsUIElement = _frameContentWhenOpened as UIElement;
if (null != frameContentWhenOpenedAsUIElement)
{
_savedNavigationInTransition = TransitionService.GetNavigationInTransition(frameContentWhenOpenedAsUIElement);
TransitionService.SetNavigationInTransition(frameContentWhenOpenedAsUIElement, null);
_savedNavigationOutTransition = TransitionService.GetNavigationOutTransition(frameContentWhenOpenedAsUIElement);
TransitionService.SetNavigationOutTransition(frameContentWhenOpenedAsUIElement, null);
}
_frame.Navigated += OnFrameNavigated;
_frame.NavigationStopped += OnFrameNavigationStoppedOrFailed;
_frame.NavigationFailed += OnFrameNavigationStoppedOrFailed;
_frame.Navigate(PickerPageUri);
}
}
}