public async Task <bool> AttachReader(OnCardData onCardData)
{
isDetached = false;
// check if we are already attached
if (reader != null)
{
return(true);
}
// check to see if we can get the reader
var deviceInfo = await SmartCardReaderUtils.GetFirstSmartCardReaderInfo(SmartCardReaderKind.Nfc);
if (deviceInfo == null || isDetached)
{
return(false);
}
// instantiate reader
reader = await SmartCardReader.FromIdAsync(deviceInfo.Id);
if (!isDetached)
{
reader.CardAdded += OnCardAdded;
reader.CardRemoved += OnCardRemoved;
customEvent = onCardData;
CardDataEvent += customEvent;
}
return(!isDetached);
}
public void DetachReader()
{
isDetached = true;
customEvent = null;
CardDataEvent = null;
if (reader == null)
{
return;
}
reader.CardAdded -= OnCardAdded;
reader.CardRemoved -= OnCardRemoved;
reader = null;
}
