private void StatusChangeMonitor()
{
uint rc;
IntPtr hContext = IntPtr.Zero;
_reader_state = SCARD.STATE_UNAWARE;
_card_atr = null;
rc =
SCARD.EstablishContext(SCARD.SCOPE_SYSTEM, IntPtr.Zero,
IntPtr.Zero, ref hContext);
if (rc != SCARD.S_SUCCESS)
return;
SCARD.READERSTATE[] states = new SCARD.READERSTATE[1];
states[0] = new SCARD.READERSTATE();
states[0].szReader = _reader_name;
states[0].pvUserData = IntPtr.Zero;
states[0].dwCurrentState = 0;
states[0].dwEventState = 0;
states[0].cbAtr = 0;
states[0].rgbAtr = null;
while (_status_change_running)
{
rc = SCARD.GetStatusChange(hContext, 250, states, 1);
if (!_status_change_running)
break;
if (rc == SCARD.E_TIMEOUT)
continue;
if (rc != SCARD.S_SUCCESS)
{
_last_error = rc;
SCARD.ReleaseContext(hContext);
if (_status_change_callback != null)
_status_change_callback(0, null);
break;
}
states[0].dwCurrentState = states[0].dwEventState;
if ((states[0].dwEventState & SCARD.STATE_CHANGED) != 0)
{
if (_status_change_callback != null)
{
CardBuffer card_atr = null;
if ((states[0].dwEventState & SCARD.STATE_PRESENT) != 0)
card_atr =
new CardBuffer(states[0].rgbAtr, (int)states[0].cbAtr);
_status_change_callback(states[0].dwEventState & ~SCARD.
STATE_CHANGED, card_atr);
}
}
}
SCARD.ReleaseContext(hContext);
}
private void UpdateState()
{
uint rc;
IntPtr hContext = IntPtr.Zero;
_reader_state = SCARD.STATE_UNAWARE;
_card_atr = null;
rc =
SCARD.EstablishContext(SCARD.SCOPE_SYSTEM, IntPtr.Zero,
IntPtr.Zero, ref hContext);
if (rc != SCARD.S_SUCCESS)
{
_last_error = rc;
return;
}
SCARD.READERSTATE[] states = new SCARD.READERSTATE[1];
states[0] = new SCARD.READERSTATE();
states[0].szReader = _reader_name;
states[0].pvUserData = IntPtr.Zero;
states[0].dwCurrentState = 0;
states[0].dwEventState = 0;
states[0].cbAtr = 0;
states[0].rgbAtr = null;
rc = SCARD.GetStatusChange(hContext, 0, states, 1);
if (rc != SCARD.S_SUCCESS)
{
SCARD.ReleaseContext(hContext);
return;
}
SCARD.ReleaseContext(hContext);
_reader_state = states[0].dwEventState;
if ((_reader_state & SCARD.STATE_PRESENT) != 0)
{
_card_atr = new CardBuffer(states[0].rgbAtr, (int)states[0].cbAtr);
}
}
private void UpdateState()
{
uint rc;
_reader_state = SCARD.STATE_UNAWARE;
_card_atr = null;
if (Connected)
{
byte[] atr_buffer = new byte[36];
uint atr_length = 36;
uint dummy = 0;
rc =
SCARD.Status(_hCard, IntPtr.Zero, ref dummy,
ref _reader_state, ref _active_protocol, atr_buffer,
ref atr_length);
if (rc != SCARD.S_SUCCESS)
{
_last_error = rc;
return;
}
_card_atr = new CardBuffer(atr_buffer, (int)atr_length);
}
else
{
SCARD.READERSTATE[] states = new SCARD.READERSTATE[1];
states[0] = new SCARD.READERSTATE();
states[0].szReader = _reader_name;
states[0].pvUserData = IntPtr.Zero;
states[0].dwCurrentState = 0;
states[0].dwEventState = 0;
states[0].cbAtr = 0;
states[0].rgbAtr = null;
rc = SCARD.GetStatusChange(_hContext, 0, states, 1);
if (rc != SCARD.S_SUCCESS)
{
_last_error = rc;
return;
}
_reader_state = states[0].dwEventState;
if ((_reader_state & SCARD.STATE_PRESENT) != 0)
{
_card_atr = new CardBuffer(states[0].rgbAtr, (int)states[0].cbAtr);
}
}
}