Question

我希望用户从列表视图中选择一首歌并播放它。我试过：listview.SelectedValuePath我收到错误：网址空白。我试过：listview.SelectedItem.ToString()我收到错误：无效的网址。 Listview项文本是文件路径。所以不是这样。我的完整代码：

FileOpenPicker picker = CreateFilePicker(audioExtensions);
IReadOnlyList<StorageFile> files = await picker.PickMultipleFilesAsync();

if (files != null && files.Count > 0)
{
    playlist = new Playlist();

    foreach (StorageFile file in files)
    {
        playlist.Files.Add(file);

        StorageFile savedFile =
            await playlist.SaveAsAsync(KnownFolders.MusicLibrary,
                                       "Sample",
                                       NameCollisionOption.ReplaceExisting,
                                       PlaylistFormat.WindowsMedia);

        this.OutputStatus.Text = savedFile.Name + " was created and saved with "
                                 + playlist.Files.Count + " files."
                                 + Environment.NewLine + "At folder: "
                                 + savedFile.Path;

        listview.Items.Add(file.Path.ToString());
    }
}
else
{
    this.OutputStatus.Text = "No files picked.";
}

我的列表视图已更改：

   private void listview_SelectionChanged(object sender, SelectionChangedEventArgs e)
   {
                media.Source = new Uri(listview.SelectedValuePath);
   }

Answer 1

第一个错误(Invalid Url Error)修复是将ListViewItems添加到ListView中：How to Insert Object Type in ListView?

第二个错误(Invalid Source)修复是从Selected ListViewItem获取Content： https://stackoverflow.com/a/9800781/2367343

选择列表视图项目时播放歌曲

1 个答案: