public Readers(ReaderScope scope)
{
uint retVal;
switch (scope)
{
case ReaderScope.Null:
context = new CardContextSafeHandler(IntPtr.Zero);
break;
case ReaderScope.System:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_SYSTEM, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
}
break;
case ReaderScope.User:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_USER, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
}
break;
}
List = new List <string>();
UpdateList();
}
public Readers(ReaderScope scope)
{
uint retVal;
switch (scope)
{
case ReaderScope.Null:
context = new CardContextSafeHandler(IntPtr.Zero);
break;
case ReaderScope.System:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_SYSTEM, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
}
break;
case ReaderScope.User:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_USER, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
}
break;
}
int size = 0;
//List the readers
//todo::listen for new readers changes (via the "\\?PnP?\Notification" reader)
char[] readers = null;
retVal = NativeMethods.SCardListReaders(context, null, readers, ref size);
if (retVal != 0 && retVal != 0x8010002E)
{
throw new InvalidOperationException("Failed to list readers (length): 0x" + retVal.ToString("X"));
}
if (retVal == 0x8010002E) //no readers
{
List = new List <string>(0);
}
else
{
readers = new char[size];
retVal = NativeMethods.SCardListReaders(context, null, readers, ref size);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to list readers: 0x" + retVal.ToString("X"));
}
List = MultiString.ToStringList(readers);
}
}
public Readers(ReaderScope scope)
{
uint retVal;
switch (scope)
{
case ReaderScope.Null:
context = new CardContextSafeHandler(IntPtr.Zero);
break;
case ReaderScope.System:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_SYSTEM, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0) throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
break;
case ReaderScope.User:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_USER, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0) throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
break;
}
}
