通过

MediaPlaybackItem.VideoTracksChanged 事件

  • 参考

定义

命名空间:
Windows.Media.Playback
编辑

当 MediaPlaybackItem 关联的 MediaSource 中的视频轨道列表发生更改时发生。

// Register
event_token VideoTracksChanged(TypedEventHandler<MediaPlaybackItem, IVectorChangedEventArgs const&> const& handler) const;

// Revoke with event_token
void VideoTracksChanged(event_token const* cookie) const;

// Revoke with event_revoker
MediaPlaybackItem::VideoTracksChanged_revoker VideoTracksChanged(auto_revoke_t, TypedEventHandler<MediaPlaybackItem, IVectorChangedEventArgs const&> const& handler) const;
public event TypedEventHandler<MediaPlaybackItem,IVectorChangedEventArgs> VideoTracksChanged;
function onVideoTracksChanged(eventArgs) { /* Your code */ }
mediaPlaybackItem.addEventListener("videotrackschanged", onVideoTracksChanged);
mediaPlaybackItem.removeEventListener("videotrackschanged", onVideoTracksChanged);
- or -
mediaPlaybackItem.onvideotrackschanged = onVideoTracksChanged;
Public Custom Event VideoTracksChanged As TypedEventHandler(Of MediaPlaybackItem, IVectorChangedEventArgs)

事件类型

TypedEventHandler<MediaPlaybackItem,IVectorChangedEventArgs>

适用于