private void ScanThreadProc()
{
lock (m_syncRoot)
{
Debug.WriteLine("+WiFiService.ScanThreadProc");
Scanning = true;
do
{
if (m_wzc == null)
{
break;
}
if (!WiFiEnabled)
{
break;
}
try
{
var et = Environment.TickCount;
if (m_currentAPs == null)
{
m_currentAPs = m_wzc.NearbyAccessPoints;
}
else
{
m_currentAPs.Refresh();
}
if (!WiFiEnabled)
{
break;
}
var added = m_currentAPs.Except(m_knownAPs);
var lost = m_knownAPs.Except(m_currentAPs);
var updated = m_knownAPs.Intersect(m_currentAPs);
m_knownAPs = m_currentAPs.ToList();
RaisePropertyChanged("KnownAPs");
var handler = ScanComplete;
et = Environment.TickCount - et;
Debug.WriteLine(string.Format("Network scan took {0}ms", et));
if (!WiFiEnabled)
{
break;
}
if (handler != null)
{
ThreadPool.QueueUserWorkItem(delegate
{
handler(added.ToArray(), lost.ToArray(), updated.ToArray());
});
}
}
catch (Exception ex)
{
Debug.WriteLine(string.Format("Exception in WiFi network scan. If you disabled the adapter, you can ignore this error: ", ex.Message));
// if we disable the WiFi adapter while this loop is executing, bad things can happen
// it's better to just catch around the whole thing and ignore
if (!WiFiEnabled)
{
break;
}
}
} while (!m_stopScanEvent.WaitOne(ScanPeriod, false));
Debug.WriteLine("-WiFiService.ScanThreadProc");
Scanning = false;
m_currentAPs = null;
}
}
