private void HandleEvent(object sender,
EventArrivedEventArgs e)
{
HardwareEventType eventType = (HardwareEventType)int.Parse(e.NewEvent.Properties["EventType"].Value.ToString());
IrssLog.Debug("HandleEvent: EvenType = {0}", eventType);
// handle only (dis)connects
if (eventType == HardwareEventType.ConfigurationChanged ||
eventType == HardwareEventType.DeviceDocking)
{
return;
}
// if eventtype is the same and timespan is < 1sec do nothing
TimeSpan eventTimeout = DateTime.Now.Subtract(lastHardwareEventTime);
if (lastEvent == eventType && eventTimeout.Milliseconds < 1000)
{
return;
}
// go on with event handling
lastEvent = eventType;
lastHardwareEventTime = DateTime.Now;
if (eventType == HardwareEventType.DeviceConnected)
{
IrssLog.Info("HardwareMonitor: Device connected");
if (DeviceConnected != null)
{
DeviceConnected();
}
}
else
{
IrssLog.Info("HardwareMonitor: Device disconnected");
if (DeviceDisconnected != null)
{
DeviceDisconnected();
}
}
}
public HardwareMonitor()
{
lastEvent = HardwareEventType.ConfigurationChanged;
lastHardwareEventTime = DateTime.MinValue;
try
{
WqlEventQuery query = new WqlEventQuery(
"SELECT * FROM Win32_DeviceChangeEvent");
watcher = new ManagementEventWatcher(query);
watcher.EventArrived +=
new EventArrivedEventHandler(
HandleEvent);
}
catch (ManagementException err)
{
IrssLog.Error("An error occurred while trying to receive an event: " + err.Message);
}
}