private async void AllMusic_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
MusicCollection.AddRange(e.NewItems.Cast <LocalMusic>());
// ArtistCollection.AddRange(e.NewItems.Cast<LocalMusic>());
AlbumCollection.AddRange(e.NewItems.Cast <LocalMusic>());
break;
case NotifyCollectionChangedAction.Remove:
foreach (LocalMusic item in e.OldItems)
{
MusicCollection.Remove(item);
// ArtistCollection.Remove(item);
AlbumCollection.Remove(item);
}
await ArtistCollection.AddRangeAsync(AllMusic.GroupBy(x => x.ArtistsName?.FirstOrDefault() ?? "未知艺术家").ToDictionary(x => x.Key, x => x.ToArray())
.Select(x =>
new LocalArtist
{
Name = x.Key,
PicPath = x.Value.First().Id3Pic,
LocalMusics = x.Value
}));
break;
case NotifyCollectionChangedAction.Replace:
break;
case NotifyCollectionChangedAction.Move:
break;
case NotifyCollectionChangedAction.Reset:
MusicCollection.Clear();
ArtistCollection.Clear();
AlbumCollection.Clear();
break;
default:
throw new ArgumentOutOfRangeException();
}
}
private async void ChooseDirectoryCommandImpl()
{
string selectPath = this._fileServices.SelectDirectory();
if (string.IsNullOrEmpty(selectPath))
{
return;
}
AllMusic.Clear();
var result = await Task.Factory.StartNew((path) =>
{
var temp = path.ToString();
if (!string.IsNullOrEmpty(temp))
{
List <string> files = new List <string>();
var extensions = Settings.Default.SupportFileExtension.Split('|');
foreach (var item in extensions)
{
files.AddRange(this._fileServices.GetFiles(temp, true, item));
}
return(files.ToArray());
}
return(Array.Empty <string>());
}, state : selectPath);
int totalPage = (int)Math.Ceiling(result.Length / (double)Settings.Default.LimitPerPage);
var tasks = new List <Task <LocalMusic[]> >();
for (int i = 0; i < totalPage; i++)
{
var tmp = result.Skip(i * Settings.Default.LimitPerPage).Take(Settings.Default.LimitPerPage);
tasks.Add(SelectMethod(tmp));
}
await Task.WhenAll(tasks);
await AllMusic.AddRangeAsync(tasks.AsParallel().SelectMany(x => x.Result).OrderBy(x => x.Title),
async y => await ArtistCollection.AddRangeAsync(AllMusic.GroupBy(x => x.ArtistsName?.FirstOrDefault() ?? "未知艺术家").ToDictionary(x => x.Key, x => x.ToArray())
.Select(x =>
new LocalArtist
{
Name = x.Key,
PicPath = x.Value.First().Id3Pic,
LocalMusics = x.Value
})));
//foreach (var item in result)
//{
// var (title, albumName, artistName, duration, fileSize) = this._fileServices.GetFileId3(item);
// AllMusic.Add(new LocalMusic
// {
// FilePath = item,
// AlbumName = albumName,
// Title = title,
// ArtistsName = artistName,
// Duration = duration,
// FileSize = fileSize
// });
//}
}