public SCardError Connect(
IntPtr hContext,
string szReader,
SCardShareMode dwShareMode,
SCardProtocol dwPreferredProtocols,
out IntPtr phCard,
out SCardProtocol pdwActiveProtocol)
{
byte[] readername = SCardHelper._ConvertToByteArray(szReader, textEncoding, SCardAPI.Lib.CharSize);
Int32 sharemode = (Int32)dwShareMode;
Int32 prefproto = (Int32)dwPreferredProtocols;
IntPtr ctx = (IntPtr)hContext;
IntPtr card;
Int32 activeproto;
Int32 result = SCardConnect(ctx,
readername,
sharemode,
prefproto,
out card,
out activeproto);
phCard = card;
pdwActiveProtocol = (SCardProtocol)activeproto;
return(SCardHelper.ToSCardError(result));
}
public SCardError ListReaders(
IntPtr hContext,
string[] Groups,
out string[] Readers)
{
IntPtr ctx = (IntPtr)hContext;
Int32 dwReaders = 0;
SCardError rc;
// initialize groups array
byte[] mszGroups = null;
if (Groups != null)
{
mszGroups = SCardHelper._ConvertToByteArray(Groups, textEncoding);
}
// determine the needed buffer size
rc = SCardHelper.ToSCardError(
SCardListReaders(ctx,
mszGroups,
null,
ref dwReaders));
if (rc != SCardError.Success)
{
Readers = null;
return(rc);
}
// initialize array
byte[] mszReaders = new byte[(int)dwReaders * sizeof(char)];
rc = SCardHelper.ToSCardError(
SCardListReaders(ctx,
mszGroups,
mszReaders,
ref dwReaders));
if (rc == SCardError.Success)
{
Readers = SCardHelper._ConvertToStringArray(mszReaders, textEncoding);
}
else
{
Readers = null;
}
return(rc);
}
