Get Windows Current LoggedIn User in C# Daemon Service

Question

I have a daemon service in.NetCore 3.1. It is executed by Windows TaskScheduler. It needs to capture the window's current logged-in username. How to do it? Tried few options-

1. WindowsIdentity.GetCurrent().Name.
2. Environment.UserName.

Both above are not giving logged-in username. When I execute the daemon service manually, then only they give the correct username.

WindowsIdentity.GetCurrent().Name -> It is always returning SYSTEM as username when daemon service is executed by TaskScheduler.

Environment.UserName -> It is always returning Windows Hostname as username when daemon service is executed by TaskScheduler.

Kindly suggest!

Answer 1

When you create a task, you can select which user account to run the application under. Just select a 'user' account rather than 'system', and either of the suggested methods will work.

Answer 2

As Damien mentioned in comments, the current user can be interpreted differently. No one needs to be logged in either.

You can try this way:

1. Retrieves the session identifier of the console session

   [DllImport("kernel32.dll")]

   static extern uint WTSGetActiveConsoleSessionId ();

// obtain the currently active session id; every logged on user in the system has a unique session id

    uint dwSessionId = WTSGetActiveConsoleSessionId();

2. How to retrieve username from session ID, see:

https://smbadiwe.github.io/post/track-activities-windows-service/