protected override void OnRestoreState(ParametersCollection state)
{
_backStack = new Stack <PageContentState>(state.GetValueOrDefault(BACK_STACK_KEY, Enumerable.Empty <PageContentState>()));
_forwardStack = new Stack <PageContentState>(state.GetValueOrDefault(FORWARD_STACK_KEY, Enumerable.Empty <PageContentState>()));
_intermediateState = state.GetValueOrDefault(INTERMEDIATE_PAGESTATE_KEY, default(PageContentState));
base.OnRestoreState(state);
RaiseHistoryChanged();
}
private PageContentState GetCurrentPageContentState()
{
// we check if an intermediate state is available
if (_intermediateState != null)
{
var _state = _intermediateState;
_intermediateState = null; // reset it
return(_state);
}
// we check the page has a url
if (string.IsNullOrEmpty(this.Url))
{
return(null);
}
// we also add
return(new PageContentState(this.Url, this.CurrentNavigationRequest != null ? this.CurrentNavigationRequest.SiteArea : null, this.Title,
(CurrentNavigationStateSupporter == null ? null : CurrentNavigationStateSupporter.SaveState()),
(CurrentNavigationViewStateSupporter == null) ? null : CurrentNavigationViewStateSupporter.SaveState()));
}
