VideoTrack.OpenFailed 事件

定义

命名空间:

Windows.Media.Core

当 VideoTrack 无法打开时发生。

// Register
event_token OpenFailed(TypedEventHandler<VideoTrack, VideoTrackOpenFailedEventArgs const&> const& handler) const;

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

// Revoke with event_revoker
VideoTrack::OpenFailed_revoker OpenFailed(auto_revoke_t, TypedEventHandler<VideoTrack, VideoTrackOpenFailedEventArgs const&> const& handler) const;

public event TypedEventHandler<VideoTrack,VideoTrackOpenFailedEventArgs> OpenFailed;

function onOpenFailed(eventArgs) { /* Your code */ }
videoTrack.addEventListener("openfailed", onOpenFailed);
videoTrack.removeEventListener("openfailed", onOpenFailed);
- or -
videoTrack.onopenfailed = onOpenFailed;

Public Custom Event OpenFailed As TypedEventHandler(Of VideoTrack, VideoTrackOpenFailedEventArgs) 

事件类型

TypedEventHandler<VideoTrack,VideoTrackOpenFailedEventArgs>

Windows 要求

设备系列	Windows 10 Anniversary Edition (在 10.0.14393.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v3.0 中引入)

注解

从 MediaPlaybackItem 的 VideoTracksChanged 事件处理程序中注册 VideoTrack 的 OpenFailed 事件，每当将视频轨道添加到项目时引发该事件。