Classic ASP
PC/SC Check the Status of each Smart Card Reader (and USB token)

Demonstrates how to list the smart card readers and USB tokens connected to the computer, and check the status of each.
Note: This functionality was introduced in Chilkat v9.5.0.87.
Chilkat Classic ASP Downloads

Classic ASP
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<%
success = 0

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

set scard = Server.CreateObject("Chilkat.SCard")

' First establish a context to the PC/SC Resource Manager
success = scard.EstablishContext("user")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( scard.LastErrorText) & "</pre>"
    Response.End
End If

set stReaders = Server.CreateObject("Chilkat.StringTable")
success = scard.ListReaders(stReaders)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( scard.LastErrorText) & "</pre>"
    Response.End
End If

numReaders = stReaders.Count
i = 0
Do While i < numReaders
    reader = stReaders.StringAt(i)

    Response.Write "<pre>" & Server.HTMLEncode( i & ": " & reader) & "</pre>"

    ' Connect to this reader.
    If (scard.Connect(reader,"shared","no_preference") = 1) Then

        ' Check the status to get the reader state, active protocol, and card ATR (if a card is inserted).
        If (scard.CheckStatus() = 1) Then
            Response.Write "<pre>" & Server.HTMLEncode( "ReaderStatus: " & scard.ReaderStatus) & "</pre>"
            Response.Write "<pre>" & Server.HTMLEncode( "CardAtr: " & scard.CardAtr) & "</pre>"
            Response.Write "<pre>" & Server.HTMLEncode( "ActiveProtocol: " & scard.ActiveProtocol) & "</pre>"
        Else
            Response.Write "<pre>" & Server.HTMLEncode( scard.LastErrorText) & "</pre>"
            Response.Write "<pre>" & Server.HTMLEncode( "CheckStatus failed.") & "</pre>"
        End If

        ' Disconnect from this reader.
        success = scard.Disconnect("leave")
    Else
        Response.Write "<pre>" & Server.HTMLEncode( scard.LastErrorText) & "</pre>"
        Response.Write "<pre>" & Server.HTMLEncode( "Connect failed.") & "</pre>"
    End If

    Response.Write "<pre>" & Server.HTMLEncode( "---------------------------------------") & "</pre>"
    i = i + 1
Loop

' Sample output:

' 0: Alcor Micro USB Smart Card Reader 0
' ReaderStatus: specific
' CardAtr: 3B7F96000080318065B0855956FB120FFE829000
' ActiveProtocol: T0
' ---------------------------------------
' 1: Generic Smart Card Reader Interface 0
' ReaderStatus: specific
' CardAtr: 3BFC180000813180459067464A00641606F2727E00E0
' ActiveProtocol: T1
' ---------------------------------------
' 2: SCM Microsystems Inc. SCR33x USB Smart Card Reader 0
' ReaderStatus: specific
' CardAtr: 3BDF96FF8131FE455A018048494443313158587300011B09
' ActiveProtocol: T1
' ---------------------------------------

' Applications should always release the context when finished.
success = scard.ReleaseContext()
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( scard.LastErrorText) & "</pre>"
End If


%>
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