void MainPage_Loaded(object sender, RoutedEventArgs e)
{
if (string.IsNullOrEmpty(Defaults.APPLICATION_ID) || string.IsNullOrEmpty(Defaults.SECRET_KEY) ||
string.IsNullOrEmpty(Defaults.VERSION))
{
NavigationService.Navigate(new Uri("/ErrorPage.xaml", UriKind.Relative));
return;
}
Backendless.InitApp(Defaults.APPLICATION_ID, Defaults.SECRET_KEY, Defaults.VERSION);
DataStore = Backendless.Persistence.Of <ToDoEntity>();
EntitiesDataGrid.DataContext = _toDoList;
_toDoList.CollectionChanged +=
(senderObj, args) => Footer.Visibility = _toDoList.Count == 0 ? Visibility.Collapsed : Visibility.Visible;
AsyncStartedEvent += () =>
{
ProgressBar.Visibility = Visibility.Visible;
ContentPanel.Opacity = 0.1;
};
AsyncFinishedEvent += () =>
{
ProgressBar.Visibility = Visibility.Collapsed;
ContentPanel.Opacity = 1;
};
AsyncStartedEvent.Invoke();
DataStore.Find(new AsyncCallback <BackendlessCollection <ToDoEntity> >(response => Dispatcher.BeginInvoke(() =>
{
_toDoList.AddAll(response.GetCurrentPage());
AsyncFinishedEvent.Invoke();
}), fault => Dispatcher.BeginInvoke(() => AsyncFinishedEvent.Invoke())));
}
