private async void OnSearchKeyWordChanged()
{
IEnumerable <Music> musicModels;
if (string.IsNullOrEmpty(SearchKeyWord))
{
musicModels = Tracks;
}
else
{
musicModels = Tracks.AsParallel().Where(x => (x.Name?.IndexOf(SearchKeyWord, StringComparison.OrdinalIgnoreCase)) > -1 ||
(x.ArtistName?.IndexOf(SearchKeyWord, StringComparison.OrdinalIgnoreCase)) > -1 ||
(x.AlbumName?.IndexOf(SearchKeyWord, StringComparison.OrdinalIgnoreCase)) > -1
).ToArray();
}
await DisplayTracks.AddRangeAsync(musicModels);
//const int CountPerPage = 30;
//int pageCount =(int)Math.Ceiling( musicModels.Count() /(double) CountPerPage);
//DisplayTracks.Clear();
//for (int i = 0; i < pageCount; i++)
//{
// DisplayTracks.AddRange(musicModels.Skip(i * CountPerPage).Take(30));
// await Task.Delay(150);
//}
}