/// <summary>
/// The WaitForCardRemoval function blocks execution until there is no card in the reader.
/// </summary>
/// <param name="szReader">
/// The name of the reader that contains the target card.
/// </param>
public void WaitForCardRemoval(string szReader)
{
int ret;
SCARD_READERSTATE[] readerStates = new SCARD_READERSTATE[1];
readerStates[0].m_szReader = szReader;
readerStates[0].m_dwEventState = (uint)SCARD_CARD_STATE.UNAWARE;
readerStates[0].m_dwCurrentState = (uint)SCARD_CARD_STATE.UNAWARE;
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)10, readerStates, (uint)1);
if (ret != 0)
{
throw new WinSCardException(scardTrace, "SCard.Connect", ret);
}
if ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.EMPTY) == (uint)SCARD_CARD_STATE.EMPTY)
{
return;
}
Trace.WriteLineIf(this.TraceSCard, " Wait for card removal...");
do
{
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)10, readerStates, (uint)1);
if (ret != 0)
{
throw new WinSCardException(scardTrace, "SCard.Connect", ret);
}
} while ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.EMPTY) != (uint)SCARD_CARD_STATE.EMPTY);
}
// blocks until someone scans their card
public void WaitForCardPresent(string szReader)
{
int ret;
SCARD_READERSTATE[] readerStates = new SCARD_READERSTATE[1];
readerStates[0].m_szReader = szReader;
readerStates[0].m_dwEventState = (uint)SCARD_CARD_STATE.UNAWARE;
readerStates[0].m_dwCurrentState = (uint)SCARD_CARD_STATE.UNAWARE;
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)10, readerStates, (uint)1);
if (ret != 0)
{
throw new WinSCardException(scardTrace, "SCard.Connect", ret);
}
if ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.PRESENT) == (uint)SCARD_CARD_STATE.PRESENT)
{
return;
}
Trace.WriteLineIf(this.TraceSCard, " Wait for card present...");
do
{
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)10, readerStates, (uint)1);
if (ret != 0)
{
throw new WinSCardException(scardTrace, "SCard.Connect", ret);
}
//this is our event loop to simulate what would be an action listener
} while ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.PRESENT) != (uint)SCARD_CARD_STATE.PRESENT);
}
/// <summary>
/// Gets a value indicating whether smart card is present.
/// </summary>
/// <param name="szReader">
/// The name of the reader that contains the target card.
/// </param>
/// <value><c>true</c> if [card activated]; otherwise, <c>false</c>.</value>
public bool GetCardPresentState(string szReader)
{
int ret;
SCARD_READERSTATE[] readerStates = new SCARD_READERSTATE[1];
readerStates[0].m_szReader = szReader;
readerStates[0].m_dwEventState = (uint)SCARD_CARD_STATE.UNAWARE;
readerStates[0].m_dwCurrentState = (uint)SCARD_CARD_STATE.UNAWARE;
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)100, readerStates, (uint)1);
if (ret != 0)
{
throw new WinSCardException(scardTrace, "SCard.Connect", ret);
}
if ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.PRESENT) == (uint)SCARD_CARD_STATE.PRESENT)
{
return(true);
}
else
{
return(false);
}
}
// The WaitForCardRemoval function blocks execution until there is no card
// present in the previous selected the selected reader.
//waits until there is no more card in the specified reader
public void WaitForCardRemoval(string szReader)
{
int ret;
SCARD_READERSTATE[] readerStates = new SCARD_READERSTATE[1];
readerStates[0].m_szReader = szReader;
readerStates[0].m_dwEventState = (uint)SCARD_CARD_STATE.UNAWARE;
readerStates[0].m_dwCurrentState = (uint)SCARD_CARD_STATE.UNAWARE;
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)10, readerStates, (uint)1);
if (ret != 0) throw new WinSCardException(scardTrace, "SCard.Connect", ret);
if ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.EMPTY) == (uint)SCARD_CARD_STATE.EMPTY)
{
return;
}
Trace.WriteLineIf(this.TraceSCard, " Wait for card removal...");
do
{
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)10, readerStates, (uint)1);
if (ret != 0) throw new WinSCardException(scardTrace, "SCard.Connect", ret);
//this is our event loop to simulate what would be an action listener
} while ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.EMPTY) != (uint)SCARD_CARD_STATE.EMPTY);
}
//gets the present state of the card reader specifyed
public bool GetCardPresentState(string szReader)
{
int ret;
SCARD_READERSTATE[] readerStates = new SCARD_READERSTATE[1];
readerStates[0].m_szReader = szReader;
readerStates[0].m_dwEventState = (uint)SCARD_CARD_STATE.UNAWARE;
readerStates[0].m_dwCurrentState = (uint)SCARD_CARD_STATE.UNAWARE;
ret = WinSCardAPIWrapper.SCardGetStatusChange(phContext, (uint)100, readerStates, (uint)1);
if (ret != 0) throw new WinSCardException(scardTrace, "SCard.Connect", ret);
if ((readerStates[0].m_dwEventState & (uint)SCARD_CARD_STATE.PRESENT) == (uint)SCARD_CARD_STATE.PRESENT)
{
return true;
}
else
{
return false;
}
}
