private void CardCk()
{
bool absent = false;
//Establish Context
retCode = ModWinsCard.SCardEstablishContext(ModWinsCard.SCARD_SCOPE_USER, 0, 0, ref hContext);
if (retCode == ModWinsCard.SCARD_S_SUCCESS)
{
while (!Present)
{
Success = true;
RdrState.RdrName = "ACS ACR122 0";
//Check Card Status
retCode = ModWinsCard.SCardGetStatusChangeA(this.hContext, 0, ref RdrState, 1);
if (retCode == ModWinsCard.SCARD_S_SUCCESS)
{
Success = true;
if ((Convert.ToUInt32(RdrState.RdrEventState) & ModWinsCard.SCARD_STATE_PRESENT) == ModWinsCard.SCARD_STATE_PRESENT)
{
retCode = ModWinsCard.SCardConnect(hContext, RdrState.RdrName, ModWinsCard.SCARD_SHARE_SHARED,
ModWinsCard.SCARD_PROTOCOL_T0 | ModWinsCard.SCARD_PROTOCOL_T1, ref hCard, ref Protocol);
if (retCode != ModWinsCard.SCARD_S_SUCCESS)
{
Success = false;
MessageBox.Show(ModWinsCard.GetScardErrMsg(retCode));
}
else
{
Success = true;
connActive = true;
Present = true;
}
}
if ((Convert.ToUInt32(RdrState.RdrEventState) & ModWinsCard.SCARD_STATE_EMPTY) == ModWinsCard.SCARD_STATE_EMPTY &&
!absent)
{
absent = true;
connActive = false;
}
}
else
{
Success = false;
MessageBox.Show(ModWinsCard.GetScardErrMsg(retCode));
}
}
}
else
{
Success = false;
MessageBox.Show(ModWinsCard.GetScardErrMsg(retCode));
}
OnCardPresent();
OnCardAbsent();
}