![]() Public const uint E_TIMEOUT = 0x8010000A Public const uint E_UNKNOWN_READER = 0x80100009 Public const uint E_INSUFFICIENT_BUFFER = 0x80100008 Public const uint F_WAITED_TOO_LONG = 0x80100007 Public const uint E_NO_MEMORY = 0x80100006 Public const uint E_INVALID_TARGET = 0x80100005 ![]() Public const uint E_INVALID_PARAMETER = 0x80100004 Public const uint E_INVALID_HANDLE = 0x80100003 Public const uint E_CANCELLED = 0x80100002 Public const uint F_INTERNAL_ERROR = 0x80100001 Public const uint S_SUCCESS = 0x00000000 Public static extern uint GetStatusChange( Public static extern uint ReleaseContext( Public static extern uint EstablishContext( List list = new List (sReaders.Split('\0')) Result = SCARD.ListReaders(hContext, sGroup, sReaders, ref nStringLength) String sReaders = new string(' ', (int)nStringLength) Uint result = SCARD.ListReaders(hContext, sGroup, null, ref nStringLength) If ((states.dwEventState & SCARD.STATE_PRESENT) != 0)īyte cardData = new byte.cbATR] įor (int j=0 j GetReaderList(IntPtr hContext, string sGroup) States.dwCurrentState = states.dwEventState Result = SCARD.GetStatusChange(hContext, 250, states, (uint)states.Length) įor (int i = 0 i tmp = GetReaderList(hContext, SCARD.GROUP_ALL_READERS) ![]() While (!bStopThread) // loop 2 - iterate over list built above States.dwCurrentState = SCARD.STATE_UNAWARE SCARD.ReaderState states = new SCARD.ReaderState While (!bStopThread) // loop 1 - build list, then iterate Uint notification_state = SCARD.STATE_UNAWARE Uint result = SCARD.EstablishContext(SCARD.SCOPE_SYSTEM, IntPtr.Zero, IntPtr.Zero, ref hContext) Public event CardPresented CardPresented Private Dictionary lastCardFound = new Dictionary() Public class ReaderList : IDisposable, IEnumerable Public delegate void CardPresented(string reader, byte cardData) Other examples I found were time-wasting and misleading, and did not work because the DllImport was wrong. The best code that I found was from SpringCard. Now that I have my code working, I would like to share so others can benefit. I recently spend too many hours searching for an complete example of how to get the ATR from and OMNIKEY proximity card. Here's the photo, if that gives you any information. How would I go about reading the UID number? Using WINSCARD.DLL in Windows I can see that I get the "ATR" data, every single byte, but the UID is apparently not present in that part.Is the "UID" number a unique number that I can rely on? I don't really care about the 447 number, all I need to know is that the information I pick from this card will uniquely identify it later, so that I can link it to the owner of the card.447 octal = 127 hexadecimal (not found).447 octal = 295 decimal (not found as BCD-type encoding).447 decimal = 1BF hexadecimal (not found).Now, here's some conversions I've considered: When using the Diagnostics application that comes with the OmniKey card reader, I get the following information: The card has the following information stamped onto it: The card has some information stamped onto it, that I would assume, in some way, is present in the card data (there is a photo of the card and reader below.) NET 3.5 program, so this is a Windows application. I am trying to read information off of a smartcard, using a contact-less OmniKey 5321 card
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