void CardRemove(CardPollingEventArg e)
{
if (OnCardFound == null)
{
return;
}
OnCardRemoved(this, e);
}
void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
if (e.ProgressPercentage >= 0)
{
CardPollingEventArg arg = (CardPollingEventArg)e.UserState;
//lock (threadpollStatusLock)
threadPollCardStatus[arg.reader] = arg.status;
switch (arg.status)
{
case CARD_STATUS.CARD_FOUND: CardFound(arg); break;
case CARD_STATUS.CARD_NOT_FOUND: CardRemove(arg); break;
}
}
else if (e.ProgressPercentage == -1)
{
CardPollingErrorEventArg arg = (CardPollingErrorEventArg)e.UserState;
//lock (threadpollStatusLock)
threadPollCardStatus[arg.reader] = CARD_STATUS.ERROR;
CardError(arg);
}
}
void bw_DoWork(object sender, DoWorkEventArgs e)
{
try
{
int retCode;
IntPtr hContext = new IntPtr();
CardPollingEventArg arg = new CardPollingEventArg();
arg.reader = e.Argument.ToString();
arg.status = CARD_STATUS.UNKNOWN;
retCode = PcscProvider.SCardEstablishContext(PcscProvider.SCARD_SCOPE_USER, 0, 0, ref hContext);
if (retCode != PcscProvider.SCARD_S_SUCCESS)
{
throw new Exception("Unable to establish context", new Exception(PcscProvider.GetScardErrMsg(retCode)));
}
BackgroundWorker bwOwner = (BackgroundWorker)sender;
while (!bwOwner.CancellationPending)
{
PcscProvider.SCARD_READERSTATE state = new PcscProvider.SCARD_READERSTATE();
state.szReader = e.Argument.ToString();
retCode = PcscProvider.SCardGetStatusChange(hContext, 3000, ref state, 1);
if (retCode != 0)
{
if (arg.status != CARD_STATUS.ERROR)
{
arg.status = CARD_STATUS.ERROR;
CardPollingErrorEventArg errorArg = new CardPollingErrorEventArg();
errorArg.errorCode = retCode;
errorArg.errorMessage = PcscProvider.GetScardErrMsg(retCode);
errorArg.reader = e.Argument.ToString();
bwOwner.ReportProgress(-1, errorArg);
}
}
else
{
//state.dwCurrentState >>= 32;
if ((state.dwEventState & PcscProvider.SCARD_STATE_PRESENT) == PcscProvider.SCARD_STATE_PRESENT)
{
if (arg.status != CARD_STATUS.CARD_FOUND)
{
arg.status = CARD_STATUS.CARD_FOUND;
arg.atr = state.rgbAtr.Take(state.cbAtr).ToArray();
bwOwner.ReportProgress(0, arg);
}
}
else
{
if (arg.status != CARD_STATUS.CARD_NOT_FOUND)
{
arg.status = CARD_STATUS.CARD_NOT_FOUND;
bwOwner.ReportProgress(0, arg);
}
}
}
System.Threading.Thread.Sleep(500);
}
PcscProvider.SCardReleaseContext(hContext);
}
catch (Exception ex)
{
}
}
