[英]Automatically play next item in listbox
我正在制作一个小型媒体播放器,在其中将媒体文件添加到用作媒体元素的播放列表的列表框中。 当我单击列表框中的项目时,它开始播放。 我想做的是使调解元素在当前播放结束后自动开始播放列表框中的下一首歌曲/视频。
这是我将歌曲添加到列表框中的方法:
OpenFileDialog ofd = new OpenFileDialog();
ofd.Multiselect = true;
if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
foreach (string file in ofd.FileNames)
{
FileInfo fileName = new FileInfo(file);
listBox.Items.Add(fileName);
}
}
这就是我如何单击列表框中的项目并开始播放
private void Button_Click(object sender, RoutedEventArgs e)
{
System.Windows.Controls.Button prevButton = player.Tag as System.Windows.Controls.Button;
System.Windows.Controls.Button button = sender as System.Windows.Controls.Button;
FileInfo fileInfo = button.DataContext as FileInfo;
// If a file is playing, stop it
if (prevButton != null)
{
player.Tag = null;
player.Stop();
prevButton.Background = Brushes.White;
// if the one thats playing is the one that was clicked -> don't play it
if (prevButton == button)
return;
}
// Play the one that was clicked
player.Tag = button;
player.Source = new Uri(fileInfo.FullName);
player.Play();
}
订阅MediaElement或MediaPlayer的MediaEnded事件,然后从列表框中选择下一项。
编辑
如何挑选下一项:
下面的代码尚未由编译器检查!
private int currentSongIndex = -1;
void Player_MediaEnded(object sender, EventArgs e)
{
if(currentSongIndex == -1)
{
currentSongIndex = listBox.SelectedIndex;
}
currentSongIndex++;
if(currentSongIndex < listBox.Items.Count)
{
player.Play(listBox.Items[currentSongIndex]);
}
else
{
// last song in listbox has been played
}
}
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