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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Data;
// Neded for [DllImport]
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Text;
public partial class _Default : System.Web.UI.Page
{
private int nContext; //Card reader context handle - DWORD
// private int nCard;
// private int nActiveProtocol; //T0/T1
[StructLayout(LayoutKind.Sequential)]
internal class SCARD_IO_REQUEST
{
internal uint dwProtocol;
internal int cbPciLength;
public SCARD_IO_REQUEST()
{
dwProtocol = 0;
}
}
// WinSCard API's to be imported
[DllImport("WinScard.dll")]
public static extern int SCardEstablishContext(uint dwScope, int nNotUsed1,
int nNotUsed2, ref int phContext);
[DllImport("WinScard.dll")]
public static extern int SCardReleaseContext(int phContext);
[DllImport("WinScard.dll")]
public static extern int SCardConnect(int hContext, string cReaderName,
uint dwShareMode, uint dwPrefProtocol, ref int phCard, ref int ActiveProtocol);
[DllImport("WinScard.dll")]
public static extern int SCardDisconnect(int hCard, int Disposition);
[DllImport("WinScard.dll")]
public static extern int SCardListReaderGroups(int hContext, ref string cGroups, ref int nStringSize);
[DllImport("winscard.dll")]
public static extern int SCardListReaders(int hContext, string cGroups, byte[] cReaderLists, ref int nReaderCount);
[DllImport("WinScard.dll")]
public static extern int SCardFreeMemory(int hContext, string cResourceToFree);
[DllImport("WinScard.dll")]
public static extern int SCardGetAttrib(int hContext, uint dwAttrId,
ref byte[] bytRecvAttr, ref int nRecLen);
[DllImport("winscard.dll")]
static extern int SCardConnect(int hContext,[MarshalAs(UnmanagedType.LPTStr)] string szReader,
UInt32 dwShareMode,
UInt32 dwPreferredProtocols,
out int phCard,
out UInt32 pdwActiveProtocol);
[DllImport("WinScard.dll")]
static extern int SCardTransmit(int hCard, IntPtr pioSendPci, byte[] pbSendBuffer, int cbSendLength, SCARD_IO_REQUEST pioRecvPci,
byte[] pbRecvBuffer, ref int pcbRecvLength);
protected void Page_Load(object sender, EventArgs e)
{
MessageBox.Show("start");
}
protected void Button1_Click(object sender, EventArgs e)
{
// MessageBox.Show("Button click");
//First step in using smart cards is CSardEstablishContext()
uint nContext = 2; //system
int nNotUsed1 = 0;
int nNotUsed2 = 0;
this.nContext = 0; //handle to context - SCARDCONTEXT
int nRetVal1 = SCardEstablishContext(nContext, nNotUsed1, nNotUsed2, ref this.nContext);
if (nRetVal1 != 0)
{
MessageBox.Show("Error returned by SCardEstablishContext()");
return;
}
//next we split up the null delimited strings into a string array
char[] delimiter = new char[1];
delimiter[0] = Convert.ToChar(0);
//Next we need to call the SCardListReaderGroups() to find reader groups to use
string cGroupList = "" + Convert.ToChar(0);
int nStringSize = -1; //SCARD_AUTOALLOCATE
int nRetVal2 = SCardListReaderGroups(this.nContext, ref cGroupList, ref nStringSize);
if (nRetVal2 != 0)
{
MessageBox.Show("Error returned by SCardListReaderGroups()");
return;
}
string[] cGroups = cGroupList.Split(delimiter);
int nReaderCount = -1;
// Get the reader list
int nRetVal4 = SCardListReaders(this.nContext, cGroups[0], null, ref nReaderCount);
if (nRetVal4 != 0)
{
MessageBox.Show(" Error returned by SCardListReaders()");
return;
}
byte[] cReaderList = new byte[nReaderCount];
nRetVal4 = SCardListReaders(this.nContext, cGroups[0], cReaderList, ref nReaderCount);
if (nRetVal4 != 0)
{
MessageBox.Show(" Error returned by SCardListReaders()");
return;
}
ASCIIEncoding asc = new ASCIIEncoding();
String[] cReaders = asc.GetString(cReaderList).Split('\0');
foreach (string cName in cReaders)
{
MessageBox.Show("Found Reader Name: " + cName, "Found Reader");
// listBox1.Items.Add(cName);
}
// listBox1.Items.Clear();
}
protected void Login1_Authenticate(object sender, AuthenticateEventArgs e)
{
}
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
} |
