public List <string> GetReaderList()
{
List <string> retval = new List <string>();
uint pcchReaders = 0;
int nullindex = -1;
char nullchar = (char)0;
try
{
// Establish context
if (!EstablishContext())
{
return(null);
}
// Find out length of the available readers character
LastError = WinSCard.SCardListReaders(
_context,
null,
null,
ref pcchReaders);
if (!IsSuccess(LastError))
{
return(null);
}
// Create a buffer and fill it
byte[] szBuffer = new byte[pcchReaders];
LastError = WinSCard.SCardListReaders(
_context,
null,
szBuffer,
ref pcchReaders);
if (!IsSuccess(LastError))
{
return(null);
}
// Convert szReaders to string
string sBuffer = Encoding.ASCII.GetString(szBuffer);
// Convert length of the available readers character to int
int len = (int)pcchReaders;
while (sBuffer[0] != (char)0)
{
nullindex = sBuffer.IndexOf(nullchar);
string reader = sBuffer.Substring(0, nullindex);
retval.Add(reader);
len = len - (reader.Length + 1);
sBuffer = sBuffer.Substring(nullindex + 1, len);
}
// Release context
ReleaseContext();
return(retval);
}
catch (Exception)
{
throw;
}
}
