Event to detect System wake up from sleep in C#

Question

I need to detect the system power state mode. To be precise, I need an event which fires up when windows 7 wakes up from sleep. I am already using:

SystemEve         


        

Answer 1

SystemEvents.PowerModeChanged += OnPowerChange;

private void OnPowerChange(object s, PowerModeChangedEventArgs e) 
{
    switch ( e.Mode ) 
    {
        case PowerModes.Resume: 
        break;
        case PowerModes.Suspend:
        break;
    }
}

You should probably read this: http://msdn.microsoft.com/en-us/library/microsoft.win32.systemevents.powermodechanged.aspx

Answer 2

You need to inspect the Mode property of the PowerModeChangedEventArgs that is passed to the event.

From MSDN:

• Resume The operating system is about to resume from a suspended state.

• StatusChange A power mode status notification event has been raised by the operating system. This might indicate a weak or charging battery, a transition between AC power and battery, or another change in the status of the system power supply.

• Suspend The operating system is about to be suspended.

Answer 3

SystemEvents.PowerModeChanged += OnPowerModeChange;
private void OnPoweModerChange(object s, PowerModeChangedEventArgs e)
{
  if(e.Mode==PowerModes.Suspend)
  {
    //Apply your operation
  }
}

Use this code to do your job