public void sCardEstablishContext(out string status)
{
status = "";
try
{
dwscope = 2;
if (readerName != "" && readerName != null)
{
retval = HID.SCardEstablishContext(dwscope, IntPtr.Zero, IntPtr.Zero, out hContext);
if (retval == 0)
{
IsAuthenticated = false;
status = "> SCardEstablishContext" + " Successful";
release_flag = true;
}
else
{
status = "> SCardEstablishContext" + " Failed... " + " Error Code: " + String.Format("{0:x}", retval) + "H\n";
//timer.Enabled = false;
}
}
else
{
status = "Failed... " + String.Format("{0:x}", retval) + "H\n";
//timer.Enabled = false;
}
}
catch { }
}
public List <string> getListReaders()
{
uint pcchReaders = 0;
int nullindex = -1;
char nullchar = (char)0;
dwscope = 2;
// Establish context.
retval = HID.SCardEstablishContext(dwscope, IntPtr.Zero, IntPtr.Zero, out hContext);
if (retval != 0)
{
throw new Exception("Błąd wykonania polecenia HID.SCardEstablishContext");
}
retval = HID.SCardListReaders(hContext, null, null, ref pcchReaders);
byte[] mszReaders = new byte[pcchReaders];
// Fill readers buffer with second call.
retval = HID.SCardListReaders(hContext, null, mszReaders, ref pcchReaders);
// Populate List with readers.
string currbuff = Encoding.ASCII.GetString(mszReaders);
ReaderList = currbuff;
int len = (int)pcchReaders;
if (len > 0)
{
while (currbuff[0] != nullchar)
{
nullindex = currbuff.IndexOf(nullchar); // Get null end character.
string reader = currbuff.Substring(0, nullindex);
readers.Add(reader);
len = len - (reader.Length + 1);
currbuff = currbuff.Substring(nullindex + 1, len);
}
}
return(readers);
}