Get Computer State (Locked, Stand By) in C#

[suryahg]

Hi,

I would like to get the status of System State like whether its Locked, or Logged.
I am using C# and application is WinForm.

Advance thanks for the help

Regards,
Surya

[Plater]

I think if you found out the currently logged in user, you would get your result.
If there is no logged in user, then you're logged out.
I suppose if someone LOCKS the pc, then they are still logged in. Hmm. Maybe cycling through the running proccess (System.Diagnostics.Process.GetCurrentProcess()) and looking at the user names of running programs could be used as well.


For currently logged on user, I would take a look at:

System.Security.Principal.WindowsIdentity.GetCurrent()
 

and it's overloads to see what is correct usage.



There may in fact be a much easier solution, but I can't think of it right now.

I also found this:
http://www.thescripts.com/forum/thread536508.html

[suryahg]

Hi,
I found the solution.

using Microsoft.Win32;
 
Constrctor()
{
SystemEvents.SessionSwitch += new SessionSwitchEventHandler(SystemEvents_SessionSwitch);
}
 
~Constrctor()
{
//Do this during application close to avoid handle leak
Microsoft.Win32.SystemEvents.SessionSwitch -= new SessionSwitchEventHandler(SystemEvents_SessionSwitch);
}
 
 
void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e)
        {
            switch (e.Reason)
            {
                case SessionSwitchReason.SessionLogon:
                case SessionSwitchReason.SessionUnlock:
                    break;
 
                case SessionSwitchReason.SessionLock:
                case SessionSwitchReason.SessionLogoff:
 
                    break;
            }
        }
 

Event is fired when ever Pc is locked, Unlocked....

Thank You
Surya

[Plater]

Excellent find .