コード例 #1
0
        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();
            }
        }
コード例 #2
0
        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
            //    });
            //}
        }