private async Task <NavigationResult> PeekPreviousRegion(INavigationParameters parameters)
{
var result = new NavigationResult();
try
{
var currentRegion = PagesContainer[NavigationHistory.Pop()];
var canNavigate = await PageUtilities.CanNavigateAsync(currentRegion, parameters);
if (!canNavigate)
{
result.Exception = new Exception(NavigationException.IConfirmNavigationReturnedFalse);
return(result);
}
if (NavigationHistory.Count == 0)
{
//TODO: exit the application.
//_applicationProvider..Quit();
result.Success = true;
return(result);
}
var previousRegion = PagesContainer[NavigationHistory.Peek()];
GetContentPresenter().Content = previousRegion;
PageUtilities.OnNavigatedFrom(currentRegion, parameters);
PageUtilities.OnNavigatedTo(previousRegion, parameters);
if (CurrentRegionName.Contains('/'))
{
PopRegion(currentRegion);
}
CurrentRegionName = NavigationHistory.Peek();
result.Success = true;
return(result);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
result.Exception = ex;
return(result);
}
}