private async void FileOpenPage_Loaded(object sender, RoutedEventArgs e)
{
var stickerExtensions = await StickerDataSource.GetStickersAsync();
if (!_pickerUi.AllowedFileTypes.Contains("*"))
{
var filteredList = stickerExtensions.ToList();
foreach (var extension in filteredList)
{
var filteredStickers = (from sticker in extension.Stickers
where _pickerUi.AllowedFileTypes.Contains(sticker.File.FileType.ToLowerInvariant())
select sticker).ToList();
extension.Stickers = filteredStickers;
}
stickerExtensions = filteredList;
}
var resources = ResourceLoader.GetForCurrentView();
_pickerUi.Title = resources.GetString("ExtensionDisplayName");
FileGridView.SelectionMode = _pickerUi.SelectionMode == FileSelectionMode.Single
? ListViewSelectionMode.Single
: ListViewSelectionMode.Multiple;
FileGridView.IsMultiSelectCheckBoxEnabled = _pickerUi.SelectionMode == FileSelectionMode.Multiple;
ExtensionsViewSource.Source = stickerExtensions;
}
/// <summary>
/// Attach the data requested event handler and load the stickers
/// </summary>
/// <param name="e">the navigation event arguments</param>
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
var stickers = await StickerDataSource.GetStickersAsync();
FilesSource.Source = stickers;
_navigationHelper.OnNavigatedTo(e);
}