public static bool IsOnBattery()
{
bool battery = false;
try
{
DateTime lastTime = new DateTime(1980, 1, 1);
using (EventLog log = new EventLog("System"))
{
int i = log.Entries.Count - 1;
while ((i >= 0) && (log.Entries.Count - i < 200))
{
EventLogEntry entry = log.Entries[i];
if (((lastTime == null) || (lastTime < entry.TimeGenerated))
&& ((entry.Source.ToLower() == "ups") || (entry.Source.ToLower() == "eventlog")))
{
int EventID = Convert.ToInt32(entry.InstanceId & 0xffff);
if (EventID == 3230)
{
lastTime = entry.TimeGenerated;
battery = true;
}
else if ((EventID == 3234) || (EventID == 6005))
{
lastTime = entry.TimeGenerated;
battery = false;
}
}
--i;
}
}
}
catch (Exception e)
{
ILog log = LogManager.GetLogger(typeof(PowerSource));
log.Error(e);
}
return battery;
}
