/// <summary>
/// Enables the MSR completed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="RunWorkerCompletedEventArgs" /> instance containing the event data.</param>
private void EnableMsrCompleted(object sender, RunWorkerCompletedEventArgs e)
{
var data = (CardSwipedEventArgs)e.Result;
if (data.HasError || data.Response != CardReaderResponse.Success)
{
InvokeCardSwipedEvent(data);
return;
}
try
{
var cardInfo = CardDataReader.GetCardInfo(data.TrackData);
cardInfo.CardReaderResponse = data.Response;
data.CardInfo = cardInfo;
InvokeCardSwipedEvent(data);
}
catch (Exception ex)
{
var newEx = new CardReaderException("Failed processing card data.", ex);
data.Exception = newEx;
InvokeCardSwipedEvent(data);
}
}
/// <summary>
/// Enables the MSR.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="DoWorkEventArgs" /> instance containing the event data.</param>
private void EnableMSR(object sender, DoWorkEventArgs e)
{
var response = CardReaderResponse.Unknown;
try
{
var trackData = new byte[512];
var length = 0;
var tracks = Convert.ToByte(e.Argument);
// yes, i did this and i know it is terrible and will eventually cause a problem
// but, i am at a loss on what else to do, this card reader keeps spitting back
// a byte array that that has a length of 7 and there is no documentation that explains
// why or how to prevent it, but doing this a couple of times fixes the problem
// janky flush
while (length <= 7)
{
// this pause allows the card reader to catch up
// without it, two swipes are necessary
Thread.Sleep(500);
response = (CardReaderResponse)UniPay_EnableMSR(tracks, trackData, out length);
// get out if this is the case
if (response == CardReaderResponse.PortClosed || response == CardReaderResponse.Fail)
{
break;
}
}
e.Result = new CardSwipedEventArgs(response)
{
TrackData = trackData, Length = length
};
}
catch (Exception ex)
{
var newEx = new CardReaderException($"Unable to read card reader. Response is {(byte)response}:{response}", ex);
e.Result = new CardSwipedEventArgs(response, newEx);
}
}
public CardSwipedEventArgs(CardReaderResponse response, CardReaderException exception)
{
Response = response;
Exception = exception;
}
