private void OnSearchTextChanged()
{
searchTaskCancellationTokenSource?.Cancel();
var txt = SearchText;
if (string.IsNullOrWhiteSpace(txt))
{
FilteredSongsLoader.Items = Enumerable.Empty <FullSongInfo>();
return;
}
searchTaskCancellationTokenSource = new CancellationTokenSource();
searchTask = Task.Run(async() =>
{
searchPlaylist = await database.Search(txt, searchTaskCancellationTokenSource.Token);
return(await Map(searchPlaylist.Playlist.Songs));
})
.ContinueWith(
task => dispatcher.Invoke(() =>
{
FilteredSongsLoader.Items = task.Result;
LoadPlaylistCommand.Refresh();
}),
searchTaskCancellationTokenSource.Token,
TaskContinuationOptions.OnlyOnRanToCompletion,
TaskScheduler.Default);
this.InvokePropertyChanged(PropertyChanged, nameof(IsLoading));
searchTask.ContinueWith(_ => dispatcher.Invoke(() => this.InvokePropertyChanged(PropertyChanged, nameof(IsLoading))));
}
private void LoadPlaylistExecute(object sender, ExecutedRoutedEventArgs e)
{
var cmd = new LoadPlaylistCommand(MainWindowViewModel.Instance.Playlist);
cmd.Execute(null);
}
