BarcodeScannerFrameReader.FrameArrived Event

Definition

Namespace:

Windows.Devices.PointOfService.Provider

Event that is raised when a frame is ready to be acquired. This event will not be raised until the frame reader is started by using StartAsync.

// Register
event_token FrameArrived(TypedEventHandler<BarcodeScannerFrameReader, BarcodeScannerFrameReaderFrameArrivedEventArgs const&> const& handler) const;

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

// Revoke with event_revoker
BarcodeScannerFrameReader::FrameArrived_revoker FrameArrived(auto_revoke_t, TypedEventHandler<BarcodeScannerFrameReader, BarcodeScannerFrameReaderFrameArrivedEventArgs const&> const& handler) const;

public event TypedEventHandler<BarcodeScannerFrameReader,BarcodeScannerFrameReaderFrameArrivedEventArgs> FrameArrived;

function onFrameArrived(eventArgs) { /* Your code */ }
barcodeScannerFrameReader.addEventListener("framearrived", onFrameArrived);
barcodeScannerFrameReader.removeEventListener("framearrived", onFrameArrived);
- or -
barcodeScannerFrameReader.onframearrived = onFrameArrived;

Public Custom Event FrameArrived As TypedEventHandler(Of BarcodeScannerFrameReader, BarcodeScannerFrameReaderFrameArrivedEventArgs) 

Event Type

TypedEventHandler<BarcodeScannerFrameReader,BarcodeScannerFrameReaderFrameArrivedEventArgs>

Remarks

To acquire a frame after it arrives, call TryAcquireLatestFrameAsync. Note that calling TryAcquireLatestFrameAsync will always return the latest frame, not the frame that caused this event to be raised.

Use BarcodeScannerFrameReaderFrameArrivedEventArgs.GetDeferral if processing needs to be done asynchronously outside the scope of the method handler.

See also

• TryAcquireLatestFrameAsync()