Does anyone know how to monitor the presence of smart card and read the UID value of the card?
Yes I tried lot of examples in web like
A Smart Card Framework for .NET
But No idea how to do it. I can detect the presence of a card and can get the UID separately, but no idea how to combine them in my application:( .
Help me
I figure it out. thought to share with anyone interested.
I used winscard.dll functions to access card data and communicate with PC.
Note that I used Mifare 1K cards as NFC tag and reader ACR 122u.
private string getcardUID()//only for mifare 1k cards
{
string cardUID = "";
byte[] receivedUID = new byte[256];
Card.SCARD_IO_REQUEST request = new Card.SCARD_IO_REQUEST();
request.dwProtocol = Card.SCARD_PROTOCOL_T1;
request.cbPciLength = System.Runtime.InteropServices.Marshal.SizeOf(typeof(Card.SCARD_IO_REQUEST));
byte[] sendBytes = new byte[] { 0xFF, 0xCA, 0x00, 0x00, 0x00 }; //get UID command for Mifare cards
int outBytes = receivedUID.Length;
int status = Card.SCardTransmit(hCard, ref request, ref sendBytes[0], sendBytes.Length, ref request, ref receivedUID[0], ref outBytes);
if (status != Card.SCARD_S_SUCCESS)
{
cardUID = "Error";
}
else
{
cardUID = BitConverter.ToString(receivedUID.Take(4).ToArray()).Replace("-", string.Empty).ToLower();
}
return cardUID;
}
For anyone interested I've written step by step guide to achieve this in here.
Simple NFC reading system for windows
Enjoy!!!