protected void establishContext()
{
int retCode;
retCode = PcscProvider.SCardEstablishContext(PcscProvider.SCARD_SCOPE_USER, 0, 0, ref hContext_);
if (retCode != PcscProvider.SCARD_S_SUCCESS)
{
throw new Exception("Unable to establish context - " + PcscProvider.GetScardErrMsg(retCode));
}
}
public string[] getReaderList()
{
byte[] returnData;
byte[] sReaderGroup = null;
string[] readerList = new string[0];
string readerString = string.Empty;
int returnCode;
IntPtr hContext = new IntPtr();
int readerCount = 255;
returnCode = PcscProvider.SCardEstablishContext(PcscProvider.SCARD_SCOPE_USER, 0, 0, ref hContext);
if (returnCode != PcscProvider.SCARD_S_SUCCESS)
{
lastError = returnCode;
return(readerList);
}
returnCode = PcscProvider.SCardListReaders(hContext_, null, null, ref readerCount);
if (returnCode != PcscProvider.SCARD_S_SUCCESS)
{
lastError = returnCode;
return(readerList);
}
returnData = new byte[readerCount];
returnCode = PcscProvider.SCardListReaders(hContext_, sReaderGroup, returnData, ref readerCount);
if (returnCode != PcscProvider.SCARD_S_SUCCESS)
{
return(readerList);
}
readerString = System.Text.ASCIIEncoding.ASCII.GetString(returnData).Trim('\0');
readerList = readerString.Split('\0');
return(readerList);
}
