用于在Zune中添加播放列表的API

在我 mentioned on twitter中,在Windows Phone 8中,您可以使用MediaLibraryExtensions在设备的音乐库中添加或删除歌曲. MSDN here上提到了新功能.但是,我找不到API的任何文档,因此这里是新的Microsoft.Xna.Framework.MediaLibraryExtensions.dll的API打印输出：

//Microsoft.Xna.Framework.MediaLibraryExtensions,Version=4.0.0.0,Culture=neutral,PublicKeyToken=842cf8be1de50553

namespace Microsoft.Xna.Framework.Media.PhoneExtensions {
    public static class MediaLibraryExtensions {
        public static void Delete(MediaLibrary library,Song song);
        public static String GetPath(Picture picture);
        public static String GetPathFromToken(MediaLibrary library,String token);
        public static Stream GetPreviewImage(Picture picture);
        public static Song SaveSong(MediaLibrary library,Uri filename,SongMetadata songMetadata,SaveSongOperation operation);
    }

    public enum SaveSongOperation {
        copyToLibrary,MovetoLibrary
    }

    public sealed class SongMetadata {
        public SongMetadata();

        public Uri albumartistBackgroundUri { get; set; }
        public String albumartistName { get; set; }
        public Uri albumartUri { get; set; }
        public String AlbumName { get; set; }
        public DateTime AlbumReleaseDate { get; set; }
        public Uri ArtistBackgroundUri { get; set; }
        public String ArtistName { get; set; }
        public TimeSpan Duration { get; set; }
        public String GenreName { get; set; }
        public String Name { get; set; }
        public Int32 TrackNumber { get; set; }
    }
}

您可以通过使用本地URI调用SaveSong并通过包含自定义SongMetadata来覆盖ID3元数据来使用此新API.此API仅允许您存储新歌曲,但我想您可以将您的播客分组为一位狡猾的艺术家.有关此API的快速说明是确保添加新的DLL引用MediaLibraryExtensions DLL.您还可以将SongMetadata保持为null并让WP8 OS推断出ID3元数据.

这是一个简单的代码片段：

private async void MainPage_Loaded(object sender,RoutedEventArgs e)
{
    var sourceFile = await Package.Current.InstalledLocation.GetFileAsync("ChargeOfTheLightBridge.mp3");
    copyFileIntoIsoStore(sourceFile);

    var library = new MediaLibrary();
    library.SaveSong(new Uri(sourceFile.Name,UriKind.RelativeOrAbsolute),new SongMetadata()
                        {
                            ArtistName = "My Custom Artist",albumartistName = "My Custom Artist",Name = "My Custom Track Name",AlbumName = "clubbing baby seals in the face",Duration = TimeSpan.FromSeconds(29),TrackNumber = 1,AlbumReleaseDate = DateTime.Now,GenreName = "podcasts"
                        },SaveSongOperation.copyToLibrary);
}

private async void copyFileIntoIsoStore(StorageFile sourceFile)
{
    using (var s = await sourceFile.OpenReadAsync())
    using (var dr = new DataReader(s))
    using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication())
    using (var targetFile = isoStore.CreateFile(sourceFile.Name))
    {
        var data = new byte[s.Size];
        await dr.LoadAsync((uint) s.Size);
        dr.ReadBytes(data);
        targetFile.Write(data,data.Length);
    }
}

请注意,我们必须在IsoStore中保存文件才能使用此API.另请注意,Uri格式不正确或在标准的IsoStore Uri中.这只是文件名.

当我们运行此代码段时,我们可以看到以下内容：