/// <inheritdoc />
public SCardReaderState[] GetReaderStatus(string[] readerNames)
{
if (readerNames == null)
{
throw new ArgumentNullException(nameof(readerNames));
}
if (readerNames.Length == 0)
{
throw new ArgumentException("You must specify at least one reader.");
}
ThrowOnInvalidContext();
var states = new SCardReaderState[readerNames.Length];
for (var i = 0; i < states.Length; i++)
{
states[i] = new SCardReaderState {
ReaderName = readerNames[i],
CurrentState = SCRState.Unaware
};
}
GetStatusChange(IntPtr.Zero, states)
.ThrowIfNotSuccess();
return(states);
}
/// <summary>Returns the current reader status of all requested readers.</summary>
/// <param name="readerNames">Requested reader names.</param>
/// <returns>An array of <see cref="T:PCSC.SCardReaderState" />s that contains the current reader status of each requested reader.</returns>
/// <remarks>
/// <para>This method uses the <see cref="M:PCSC.SCardContext.GetStatusChange(System.IntPtr,PCSC.SCardReaderState[])" /> method with a timeout of zero.</para>
/// <example>
/// <code lang="C#">
/// // Retrieve the names of all installed readers.
/// using (var ctx = new SCardContext()) {
/// ctx.Establish(SCardScope.System);
/// var readerNames = ctx.GetReaders();
///
/// // Get the current status for all readers.
/// var states = ctx.GetReaderStatus(readerNames);
///
/// foreach (var state in states) {
/// Console.WriteLine("------------------------------");
/// Console.WriteLine("Reader: " + state.ReaderName);
/// Console.WriteLine("CurrentState: " + state.CurrentState
/// + " EventState: " + state.EventState + "\n"
/// + "CurrentStateValue: " + state.CurrentStateValue
/// + " EventStateValue: " + state.EventStateValue);
/// Console.WriteLine("UserData: " + state.UserData.ToString()
/// + " CardChangeEventCnt: " + state.CardChangeEventCnt);
/// Console.WriteLine("ATR: " + BitConverter.ToString(state.Atr));
/// }
/// }
/// </code>
/// </example>
/// </remarks>
public SCardReaderState[] GetReaderStatus(string[] readerNames)
{
if (readerNames == null)
{
throw new ArgumentNullException("readerNames");
}
if (readerNames.Length == 0)
{
throw new ArgumentException("You must specify at least one reader.");
}
var states = new SCardReaderState[readerNames.Length];
for (var i = 0; i < states.Length; i++)
{
states[i] = new SCardReaderState {
ReaderName = readerNames[i],
CurrentState = SCRState.Unaware
};
}
var rc = GetStatusChange(IntPtr.Zero, states);
if (rc != SCardError.Success)
{
throw new PCSCException(rc, SCardHelper.StringifyError(rc));
}
return(states);
}
public SCardReaderState[] GetReaderStatus(string[] readernames)
{
SCardError rc;
if (readernames == null)
throw new ArgumentNullException("readernames");
if (readernames.Length == 0)
throw new ArgumentException("You must specify at least one reader.");
SCardReaderState[] states = new SCardReaderState[readernames.Length];
for (int i = 0; i < states.Length; i++)
{
states[i] = new SCardReaderState();
states[i].ReaderName = readernames[i];
states[i].CurrentState = SCRState.Unaware;
}
rc = GetStatusChange(IntPtr.Zero, states);
if (rc != SCardError.Success)
throw new PCSCException(rc, SCardHelper.StringifyError(rc));
return states;
}
public SCardError GetStatusChange(
IntPtr timeout,
SCardReaderState[] readerstates)
{
if (contextPtr.Equals(IntPtr.Zero))
throw new InvalidContextException(SCardError.InvalidHandle);
SCardError rc = SCardAPI.Lib.GetStatusChange(
contextPtr,
timeout,
readerstates);
return rc;
}
public SCardReaderState[] GetReaderStatus(string[] readernames)
{
SCardError rc;
if (readernames == null)
throw new ArgumentNullException("readernames");
if (readernames.Length == 0)
throw new ArgumentException("You must specify at least one reader.");
SCardReaderState[] states = new SCardReaderState[readernames.Length];
for (int i = 0; i < states.Length; i++)
{
states[i] = new SCardReaderState();
states[i].ReaderName = readernames[i];
states[i].CurrentState = SCRState.Unaware;
}
rc = GetStatusChange(IntPtr.Zero, states);
if (rc != SCardError.Success)
throw new PCSCException(rc, SCardHelper.StringifyError(rc));
return states;
}
private void StartMonitor()
{
monitoring = true;
SCardReaderState[] state = new SCardReaderState[readernames.Length];
for (int i = 0; i < readernames.Length; i++)
{
state[i] = new SCardReaderState();
state[i].ReaderName = readernames[i];
state[i].CurrentState = SCRState.Unaware; /* force SCardGetStatusChange to return
immediately with the current reader state */
}
SCardError rc = context.GetStatusChange(IntPtr.Zero, state);
if (rc == SCardError.Success)
{
// initialize event
if (Initialized != null)
{
for (int i = 0; i < state.Length; i++)
{
Initialized(this,
new CardStatusEventArgs(readernames[i],
(state[i].EventState & (~(SCRState.Changed))),
state[i].ATR));
previousState[i] = state[i].EventState & (~(SCRState.Changed)); // remove "Changed"
previousStateValue[i] = state[i].EventStateValue;
}
}
while (true)
{
for (int i = 0; i < state.Length; i++)
{
state[i].CurrentStateValue = previousStateValue[i];
}
// block until status change occurs
rc = context.GetStatusChange(SCardReader.Infinite, state);
// Cancel?
if (rc != SCardError.Success)
break;
for (int i = 0; i < state.Length; i++)
{
SCRState newState = state[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
byte[] Atr = state[i].ATR;
// Status change
if (StatusChanged != null &&
(previousState[i] != newState))
StatusChanged(this,
new StatusChangeEventArgs(readernames[i],
previousState[i],
newState,
Atr));
// Card inserted
if (((newState & SCRState.Present) == SCRState.Present) &&
((previousState[i] & SCRState.Empty) == SCRState.Empty))
if (CardInserted != null)
CardInserted(this,
new CardStatusEventArgs(readernames[i],
newState,
Atr));
// Card removed
if (((newState & SCRState.Empty) == SCRState.Empty) &&
((previousState[i] & SCRState.Present) == SCRState.Present))
if (CardRemoved != null)
CardRemoved(this,
new CardStatusEventArgs(readernames[i],
newState,
Atr));
previousState[i] = newState;
previousStateValue[i] = state[i].EventStateValue;
}
}
}
monitoring = false;
if (rc != SCardError.Cancelled)
if (MonitorException != null)
MonitorException(this, new PCSCException(rc,
"An error occured during SCardGetStatusChange(..)."));
}
private void StartMonitor()
{
_monitoring = true;
var readerStates = new SCardReaderState[_readernames.Length];
for (var i = 0; i < _readernames.Length; i++) {
readerStates[i] = new SCardReaderState {
ReaderName = _readernames[i],
CurrentState = SCRState.Unaware
};
}
var rc = _context.GetStatusChange(IntPtr.Zero, readerStates);
if (rc == SCardError.Success) {
// initialize event
var onInitializedHandler = Initialized;
if (onInitializedHandler != null) {
for (var i = 0; i < readerStates.Length; i++) {
onInitializedHandler(this,
new CardStatusEventArgs(
_readernames[i],
(readerStates[i].EventState & (~(SCRState.Changed))),
readerStates[i].Atr));
_previousState[i] = readerStates[i].EventState & (~(SCRState.Changed)); // remove "Changed"
_previousStateValue[i] = readerStates[i].EventStateValue;
}
}
while (true) {
for (var i = 0; i < readerStates.Length; i++) {
readerStates[i].CurrentStateValue = _previousStateValue[i];
}
// block until status change occurs
rc = _context.GetStatusChange(_context.Infinite, readerStates);
// Cancel?
if (rc != SCardError.Success) {
break;
}
for (var i = 0; i < readerStates.Length; i++) {
var newState = readerStates[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
var atr = readerStates[i].Atr;
// Status change
var onStatusChangedHandler = StatusChanged;
if (onStatusChangedHandler != null && (_previousState[i] != newState)) {
onStatusChangedHandler(this,
new StatusChangeEventArgs(_readernames[i],
_previousState[i],
newState,
atr));
}
// Card inserted
if (((newState & SCRState.Present) == SCRState.Present) &&
((_previousState[i] & SCRState.Empty) == SCRState.Empty)) {
var onCardInsertedHandler = CardInserted;
if (onCardInsertedHandler != null) {
onCardInsertedHandler(this,
new CardStatusEventArgs(_readernames[i],
newState,
atr));
}
}
// Card removed
if (((newState & SCRState.Empty) == SCRState.Empty) &&
((_previousState[i] & SCRState.Present) == SCRState.Present)) {
var onCardRemovedHandler = CardRemoved;
if (onCardRemovedHandler != null) {
onCardRemovedHandler(this,
new CardStatusEventArgs(_readernames[i],
newState,
atr));
}
}
_previousState[i] = newState;
_previousStateValue[i] = readerStates[i].EventStateValue;
}
}
}
_monitoring = false;
foreach (var state in readerStates) {
state.Dispose();
}
if (rc == SCardError.Cancelled) {
return;
}
var monitorExceptionHandler = MonitorException;
if (monitorExceptionHandler != null) {
monitorExceptionHandler(this, new PCSCException(rc, "An error occured during SCardGetStatusChange(..)."));
}
}
private void StartMonitor()
{
try {
_monitoring = true;
var readerStates = new SCardReaderState[_readernames.Length];
for (var i = 0; i < _readernames.Length; i++)
{
readerStates[i] = new SCardReaderState {
ReaderName = _readernames[i],
CurrentState = SCRState.Unaware
};
}
var rc = _context.GetStatusChange(IntPtr.Zero, readerStates);
if (rc == SCardError.Success)
{
// initialize event
for (var i = 0; i < readerStates.Length; i++)
{
var initState = readerStates[i].EventState & (~(SCRState.Changed));
OnInitialized(readerStates[i].Atr, _readernames[i], initState);
_previousStates[i] = initState; // remove "Changed"
_previousStateValues[i] = readerStates[i].EventStateValue;
}
while (!_is_disposed)
{
for (var i = 0; i < readerStates.Length; i++)
{
readerStates[i].CurrentStateValue = _previousStateValues[i];
}
// block until status change occurs
rc = _context.GetStatusChange(_context.Infinite, readerStates);
// Cancel?
if (rc != SCardError.Success)
{
break;
}
for (var i = 0; i < readerStates.Length; i++)
{
var newState = readerStates[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
var atr = readerStates[i].Atr;
var previousState = _previousStates[i];
var readerName = _readernames[i];
// Status change
if (previousState != newState)
{
OnStatusChanged(atr, readerName, previousState, newState);
}
// Card inserted
if (newState.CardIsPresent() && previousState.CardIsAbsent())
{
OnCardInserted(atr, readerName, newState);
}
// Card removed
if (newState.CardIsAbsent() && previousState.CardIsPresent())
{
OnCardRemoved(atr, readerName, newState);
}
_previousStates[i] = newState;
_previousStateValues[i] = readerStates[i].EventStateValue;
}
}
}
foreach (var state in readerStates)
{
state.Dispose();
}
if (!_is_disposed && (rc != SCardError.Cancelled))
{
OnMonitorException(rc, "An error occured during SCardGetStatusChange(..).");
}
} finally {
_readernames = null;
_previousStateValues = null;
_previousStates = null;
_monitoring = false;
_monitorthread = null;
}
}
private void StartMonitor()
{
_monitoring = true;
var readerStates = new SCardReaderState[_readernames.Length];
for (var i = 0; i < _readernames.Length; i++)
{
readerStates[i] = new SCardReaderState {
ReaderName = _readernames[i],
CurrentState = SCRState.Unaware
};
}
var rc = _context.GetStatusChange(IntPtr.Zero, readerStates);
if (rc == SCardError.Success)
{
// initialize event
var onInitializedHandler = Initialized;
if (onInitializedHandler != null)
{
for (var i = 0; i < readerStates.Length; i++)
{
onInitializedHandler(this,
new CardStatusEventArgs(
_readernames[i],
(readerStates[i].EventState & (~(SCRState.Changed))),
readerStates[i].Atr));
_previousState[i] = readerStates[i].EventState & (~(SCRState.Changed)); // remove "Changed"
_previousStateValue[i] = readerStates[i].EventStateValue;
}
}
while (true)
{
for (var i = 0; i < readerStates.Length; i++)
{
readerStates[i].CurrentStateValue = _previousStateValue[i];
}
// block until status change occurs
rc = _context.GetStatusChange(_context.Infinite, readerStates);
// Cancel?
if (rc != SCardError.Success)
{
break;
}
for (var i = 0; i < readerStates.Length; i++)
{
var newState = readerStates[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
var atr = readerStates[i].Atr;
// Status change
var onStatusChangedHandler = StatusChanged;
if (onStatusChangedHandler != null && (_previousState[i] != newState))
{
onStatusChangedHandler(this,
new StatusChangeEventArgs(_readernames[i],
_previousState[i],
newState,
atr));
}
// Card inserted
if (((newState & SCRState.Present) == SCRState.Present) &&
((_previousState[i] & SCRState.Empty) == SCRState.Empty))
{
var onCardInsertedHandler = CardInserted;
if (onCardInsertedHandler != null)
{
onCardInsertedHandler(this,
new CardStatusEventArgs(_readernames[i],
newState,
atr));
}
}
// Card removed
if (((newState & SCRState.Empty) == SCRState.Empty) &&
((_previousState[i] & SCRState.Present) == SCRState.Present))
{
var onCardRemovedHandler = CardRemoved;
if (onCardRemovedHandler != null)
{
onCardRemovedHandler(this,
new CardStatusEventArgs(_readernames[i],
newState,
atr));
}
}
_previousState[i] = newState;
_previousStateValue[i] = readerStates[i].EventStateValue;
}
}
}
_monitoring = false;
foreach (var state in readerStates)
{
state.Dispose();
}
if (rc == SCardError.Cancelled)
{
return;
}
var monitorExceptionHandler = MonitorException;
if (monitorExceptionHandler != null)
{
monitorExceptionHandler(this, new PCSCException(rc, "An error occured during SCardGetStatusChange(..)."));
}
}
private void StartMonitor()
{
monitoring = true;
SCardReaderState[] state = new SCardReaderState[readernames.Length];
for (int i = 0; i < readernames.Length; i++)
{
state[i] = new SCardReaderState();
state[i].ReaderName = readernames[i];
state[i].CurrentState = SCRState.Unaware; /* force SCardGetStatusChange to return
* immediately with the current reader state */
}
SCardError rc = context.GetStatusChange(IntPtr.Zero, state);
if (rc == SCardError.Success)
{
// initialize event
if (Initialized != null)
{
for (int i = 0; i < state.Length; i++)
{
Initialized(this,
new CardStatusEventArgs(readernames[i],
(state[i].EventState & (~(SCRState.Changed))),
state[i].ATR));
previousState[i] = state[i].EventState & (~(SCRState.Changed)); // remove "Changed"
previousStateValue[i] = state[i].EventStateValue;
}
}
while (true)
{
for (int i = 0; i < state.Length; i++)
{
state[i].CurrentStateValue = previousStateValue[i];
}
// block until status change occurs
rc = context.GetStatusChange(SCardReader.Infinite, state);
// Cancel?
if (rc != SCardError.Success)
{
break;
}
for (int i = 0; i < state.Length; i++)
{
SCRState newState = state[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
byte[] Atr = state[i].ATR;
// Status change
if (StatusChanged != null &&
(previousState[i] != newState))
{
StatusChanged(this,
new StatusChangeEventArgs(readernames[i],
previousState[i],
newState,
Atr));
}
// Card inserted
if (((newState & SCRState.Present) == SCRState.Present) &&
((previousState[i] & SCRState.Empty) == SCRState.Empty))
{
if (CardInserted != null)
{
CardInserted(this,
new CardStatusEventArgs(readernames[i],
newState,
Atr));
}
}
// Card removed
if (((newState & SCRState.Empty) == SCRState.Empty) &&
((previousState[i] & SCRState.Present) == SCRState.Present))
{
if (CardRemoved != null)
{
CardRemoved(this,
new CardStatusEventArgs(readernames[i],
newState,
Atr));
}
}
previousState[i] = newState;
previousStateValue[i] = state[i].EventStateValue;
}
}
}
monitoring = false;
if (rc != SCardError.Cancelled)
{
if (MonitorException != null)
{
MonitorException(this, new PCSCException(rc,
"An error occured during SCardGetStatusChange(..)."));
}
}
}
private void StartMonitor()
{
try {
_monitoring = true;
var readerStates = new SCardReaderState[_readernames.Length];
for (var i = 0; i < _readernames.Length; i++) {
readerStates[i] = new SCardReaderState {
ReaderName = _readernames[i],
CurrentState = SCRState.Unaware
};
}
var rc = _context.GetStatusChange(IntPtr.Zero, readerStates);
if (rc == SCardError.Success) {
// initialize event
for (var i = 0; i < readerStates.Length; i++) {
var initState = readerStates[i].EventState & (~(SCRState.Changed));
OnInitialized(readerStates[i].Atr, _readernames[i], initState);
_previousStates[i] = initState; // remove "Changed"
_previousStateValues[i] = readerStates[i].EventStateValue;
}
while (!_is_disposed) {
for (var i = 0; i < readerStates.Length; i++) {
readerStates[i].CurrentStateValue = _previousStateValues[i];
}
// block until status change occurs
rc = _context.GetStatusChange(_context.Infinite, readerStates);
// Cancel?
if (rc != SCardError.Success) {
break;
}
for (var i = 0; i < readerStates.Length; i++) {
var newState = readerStates[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
var atr = readerStates[i].Atr;
var previousState = _previousStates[i];
var readerName = _readernames[i];
// Status change
if (previousState != newState) {
OnStatusChanged(atr, readerName, previousState, newState);
}
// Card inserted
if (newState.CardIsPresent() && previousState.CardIsAbsent()) {
OnCardInserted(atr, readerName, newState);
}
// Card removed
if (newState.CardIsAbsent() && previousState.CardIsPresent()) {
OnCardRemoved(atr, readerName, newState);
}
_previousStates[i] = newState;
_previousStateValues[i] = readerStates[i].EventStateValue;
}
}
}
foreach (var state in readerStates) {
state.Dispose();
}
if (!_is_disposed && (rc != SCardError.Cancelled)) {
OnMonitorException(rc, "An error occured during SCardGetStatusChange(..).");
}
} finally {
_readernames = null;
_previousStateValues = null;
_previousStates = null;
_monitoring = false;
_monitorthread = null;
}
}
/// <summary>Blocks execution until the current availability of the cards in a specific set of readers changes.</summary>
/// <param name="timeout">Maximum waiting time (in milliseconds) for status change, zero or <see cref="INFINITE" /> for infinite.</param>
/// <param name="readerStates">Structures of readers with current states.</param>
/// <returns>
/// <para>A <see cref="T:PCSC.SCardError" /> indicating an error or the success.The caller receives status changes through the <see cref="T:PCSC.SCardReaderState" /> array.</para>
/// <list type="table">
/// <listheader>
/// <term>Return value</term>
/// <description>Description</description>
/// </listheader>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.Success" />
/// </term>
/// <description>Successful (SCARD_S_SUCCESS)</description>
/// </item>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.NoService" />
/// </term>
/// <description>Server is not running (SCARD_E_NO_SERVICE)</description>
/// </item>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.InvalidParameter" />
/// </term>
/// <description>
/// <paramref name="readerStates" /> is invalid or <see langword="null" /> (SCARD_E_INVALID_PARAMETER)</description>
/// </item>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.InvalidValue" />
/// </term>
/// <description>Invalid States, reader name, etc (SCARD_E_INVALID_VALUE)</description>
/// </item>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.InvalidHandle" />
/// </term>
/// <description>Invalid context (SCARD_E_INVALID_HANDLE)</description>
/// </item>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.ReaderUnavailable" />
/// </term>
/// <description>The reader is unavailable (SCARD_E_READER_UNAVAILABLE)</description>
/// </item>
/// <item>
/// <term>
/// <see cref="F:PCSC.SCardError.Timeout" />
/// </term>
/// <description>The user-specified timeout value has expired (SCARD_E_TIMEOUT)</description>
/// </item>
/// </list>
/// </returns>
/// <remarks>
/// <para>This method receives a structure or list of structures containing reader names. It then blocks for a change in state to occur for a maximum blocking time of <paramref name="timeout" /> or forever if <see cref="INFINITE" /> is used.</para>
/// <para>The new event state will be contained in <see cref="P:PCSC.SCardReaderState.EventState" />. A status change might be a card insertion or removal event, a change in ATR, etc.</para>
/// <para>To wait for a reader event (reader added or removed) you may use the special reader name "\\?PnP?\Notification". If a reader event occurs the state of this reader will change and the bit <see cref="F:PCSC.SCRState.Changed" /> will be set.</para>
/// <para>This method calls the API function SCardGetStatusChange().</para>
/// </remarks>
public SCardError GetStatusChange(IntPtr timeout, SCardReaderState[] readerStates) {
if (_contextPtr.Equals(IntPtr.Zero)) {
throw new InvalidContextException(SCardError.InvalidHandle);
}
return Platform.Lib.GetStatusChange(_contextPtr, timeout, readerStates);
}
/// <summary>Returns the current reader status of all requested readers.</summary>
/// <param name="readerNames">Requested reader names.</param>
/// <returns>An array of <see cref="T:PCSC.SCardReaderState" />s that contains the current reader status of each requested reader.</returns>
/// <remarks>
/// <para>This method uses the <see cref="M:PCSC.SCardContext.GetStatusChange(System.IntPtr,PCSC.SCardReaderState[])" /> method with a timeout of zero.</para>
/// <example>
/// <code lang="C#">
/// // Retrieve the names of all installed readers.
/// using (var ctx = new SCardContext()) {
/// ctx.Establish(SCardScope.System);
/// var readerNames = ctx.GetReaders();
///
/// // Get the current status for all readers.
/// var states = ctx.GetReaderStatus(readerNames);
///
/// foreach (var state in states) {
/// Console.WriteLine("------------------------------");
/// Console.WriteLine("Reader: " + state.ReaderName);
/// Console.WriteLine("CurrentState: " + state.CurrentState
/// + " EventState: " + state.EventState + "\n"
/// + "CurrentStateValue: " + state.CurrentStateValue
/// + " EventStateValue: " + state.EventStateValue);
/// Console.WriteLine("UserData: " + state.UserData.ToString()
/// + " CardChangeEventCnt: " + state.CardChangeEventCnt);
/// Console.WriteLine("ATR: " + BitConverter.ToString(state.Atr));
/// }
/// }
/// </code>
/// </example>
/// </remarks>
public SCardReaderState[] GetReaderStatus(string[] readerNames) {
if (readerNames == null) {
throw new ArgumentNullException("readerNames");
}
if (readerNames.Length == 0) {
throw new ArgumentException("You must specify at least one reader.");
}
var states = new SCardReaderState[readerNames.Length];
for (var i = 0; i < states.Length; i++) {
states[i] = new SCardReaderState {
ReaderName = readerNames[i],
CurrentState = SCRState.Unaware
};
}
GetStatusChange(IntPtr.Zero, states)
.ThrowIfNotSuccess();
return states;
}
private void StartMonitor(Monitor monitor)
{
var readerStates = new SCardReaderState[monitor.ReaderNames.Length];
for (var i = 0; i < monitor.ReaderNames.Length; i++)
{
readerStates[i] = new SCardReaderState {
ReaderName = monitor.ReaderNames[i],
CurrentState = SCRState.Unaware
};
}
var rc = monitor.Context.GetStatusChange(IntPtr.Zero, readerStates);
if (rc == SCardError.Success)
{
// initialize event
for (var i = 0; i < readerStates.Length; i++)
{
var initState = readerStates[i].EventState & (~(SCRState.Changed));
OnInitialized(readerStates[i].Atr, monitor.ReaderNames[i], initState);
monitor.PreviousStates[i] = initState; // remove "Changed"
monitor.PreviousStateValues[i] = readerStates[i].EventStateValue;
}
while (!_isDisposed && !monitor.CancelRequested)
{
for (var i = 0; i < readerStates.Length; i++)
{
readerStates[i].CurrentStateValue = monitor.PreviousStateValues[i];
}
// block until status change occurs
rc = monitor.Context.GetStatusChange(monitor.Context.Infinite, readerStates);
// Cancel?
if (rc != SCardError.Success)
{
break;
}
for (var i = 0; i < readerStates.Length; i++)
{
var newState = readerStates[i].EventState;
newState &= (~(SCRState.Changed)); // remove "Changed"
var atr = readerStates[i].Atr;
var previousState = monitor.PreviousStates[i];
var readerName = monitor.ReaderNames[i];
// Status change
if (previousState != newState)
{
OnStatusChanged(atr, readerName, previousState, newState);
}
// Card inserted
if (newState.CardIsPresent() && previousState.CardIsAbsent())
{
OnCardInserted(atr, readerName, newState);
}
// Card removed
if (newState.CardIsAbsent() && previousState.CardIsPresent())
{
OnCardRemoved(atr, readerName, newState);
}
monitor.PreviousStates[i] = newState;
monitor.PreviousStateValues[i] = readerStates[i].EventStateValue;
}
}
}
foreach (var state in readerStates)
{
state.Dispose();
}
if (_isDisposed || monitor.CancelRequested || rc == SCardError.Cancelled)
{
return;
}
OnMonitorException(rc, "An error occured during SCardGetStatusChange(..).");
}
