Get the logged on user name in C#

Question

How do i get the current logged on user name in windows 7 (i.e the user who is physically logged on to the console in which the program that i am launching is running).

Answer 1

Altough I don't understand if you want to get the user name, who is logged on the system or the user name under which the console is running - maybe you could try using System.Environment.UserName - MSDN claims that it shows the logged on user name.

Answer 2

You want the user name of your session. You can find out your session ID by calling ProcessIdToSessionId. Then use WTSQuerySessionInformation to find out the user name.

Answer 3

I think just converting the WMI calls to c# works just fine for me.

            ConnectionOptions oConn = new ConnectionOptions();
            System.Management.ManagementScope oMs = new System.Management.ManagementScope("\\\\localhost", oConn);


            System.Management.ObjectQuery oQuery = new System.Management.ObjectQuery("select * from Win32_ComputerSystem");
            ManagementObjectSearcher oSearcher = new ManagementObjectSearcher(oMs, oQuery);
            ManagementObjectCollection oReturnCollection = oSearcher.Get();

            foreach (ManagementObject oReturn in oReturnCollection) {
                Console.WriteLine(oReturn["UserName"].ToString().ToLower());
            }

Answer 4

I think you'd have to go down a P/Invoke route. You need to find out which WindowStation your process is running within, and then determine the owner of that WindowStation. I don't think that there's a .NET api for determining these things.

Win32 APIs that you'd need to look at, are probably GetProcessWindowStation and GetUserObjectSecurity to find the owner.