Question

我想在Windows Phone 8中使用语言c＃后面的代码制作音乐播放器并在XAML中进行设计。我想在一个窗口中显示手机的mp3文件列表。

如何在一个窗口中显示手机的mp3文件列表？

Answer 1

好吧，如果您想列出手机媒体库中的歌曲列表，那么

制作基类SongModel

public class SongModel
{
    public int songId { get; set; }
    public string songName { get; set; }
}

制作全局变量

MediaLibrary mLibrary = new MediaLibrary();
SongCollection songs;
List<SongModel> songnames;

现在在页面构造函数中编写这些代码行

songs = mLibrary.Songs;
MediaPlayer.ActiveSongChanged += MediaPlayer_ActiveSongChanged;
MediaPlayer.MediaStateChanged += MediaPlayer_MediaStateChanged;
if (songs.Count != 0)
{
    songnames = new List<SongModel>();
    for (int i = 0; i < songs.Count; i++)
    {
        songnames.Add(new SongModel() { songName = songs[i].Name, songId = i });
    }
    lbMusic.ItemsSource = songnames; // lbMusic is the list/listbox here
}

xaml for listbox lbMusic

<ListBox  SelectionChanged="lbMusic_SelectionChanged" Foreground="Black" FontWeight="Bold" Name="lbMusic" Height="210" Width="480" Margin="0,10,0,0">
    <ListBox.ItemTemplate>
        <DataTemplate> 
            <StackPanel Margin="0,5,0,5" Width="480" Background="White" Height="40">
                <TextBlock VerticalAlignment="Center" HorizontalAlignment="Left" Text="{Binding songName}" TextTrimming="WordEllipsis" Margin="30,0,0,0" Tag="{Binding songId}"/>
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

根据歌曲ID播放歌曲，Ovveride列表框的selectionChanged事件。

private void lbMusic_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    try
    {
        if (lbMusic.SelectedIndex != -1)
        {
            int musicId = (lbMusic.SelectedItem as SongModel).songId;
            MediaPlayer.Play(songs, musicId);
        }
    }
    catch
    {
        MessageBox.Show(TextResources.resErrorActiveSong);
    }
}

我希望这有助于预期

我如何在Windows Phone 8的一个窗口中显示手机的mp3文件列表

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