public static string[] GetReaderList(IntPtr hContext, string Groups)
{
int i, j = 0;
string s = "";
uint rc;
uint readers_size = 0;
int readers_count = 0;
rc = SCARD.ListReaders(hContext, Groups, null, ref readers_size);
if (rc != SCARD.S_SUCCESS)
{
return(null);
}
string readers_str = new string(' ', (int)readers_size);
rc = SCARD.ListReaders(hContext, Groups, readers_str, ref readers_size);
if (rc != SCARD.S_SUCCESS)
{
return(null);
}
for (i = 0; i < readers_size; i++)
{
if (readers_str[i] == '\0')
{
if (i > 0)
{
readers_count++;
}
if (readers_str[i + 1] == '\0')
{
break;
}
}
}
string[] readers = new string[readers_count];
if (readers_count > 0)
{
for (i = 0; i < readers_size; i++)
{
if (readers_str[i] == '\0')
{
readers[j++] = s;
if (readers_str[i + 1] == '\0')
{
break;
}
s = "";
}
else
{
s = s + readers_str[i];
}
}
}
return(readers);
}