How can I tell if a User logged in through AD or a Local account?

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Hi,

I'm trying to determine if a user has logged in through a local account or through Active Directory. I know I can try and access the domain controller and trap an exception if it's local, however there must be some way to just query this.

Thank you,
Glenn

Posted 10-May-14 8:22am

gmhanna

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Nelek 10-May-14 17:42pm

What have you tried?[^]

ZurdoDev 11-May-14 13:00pm

Logged into what? Your app or windows?

David_Wimbley 11-May-14 18:43pm

This is how you can tell...write the code and then it will tell...tah dah!

If it is your app i don't understand how you can not be able to tell if it is local or not.

Domain username example: Domain.com\MyUsername
Local username example: MyComputersMachineName\MyUsername

Pretty simple...If you come up with some edge case of "what if on a tuesday and the moon is the highest in the sky and the user finally logs in"...then check the username against the domain controller.

gmhanna 12-May-14 8:25am

Hi David,

Where is that information kept that I can query in C#? I've tried the Environment.UserDomainName property however that throws an exception when trying to access it when the user is not logged on to a domain controller.

Thanks,
Glenn

David_Wimbley 12-May-14 13:41pm

I ran it on my local and it didn't throw an exception.

Environment.UserDomainName

My local PC is Endor and it returns Endor.

You can also use Environment.Username i believe it is to then get the full username

Enviornment.UserDomainName + @"\" + Enviornment.Username == ENDOR\dwimbley

I have no clue what your code looks like as you didn't post anything so its possible that your exception is coming due to some other reason.

Also, not sure if this is a winforms/console/wpf/mvc/webforms app either so that could change things as well.

gmhanna 12-May-14 18:40pm

I guess I should learn a lesson here and not try and remember what the code looks like when I'm at the office and the program is at home. This code works perfectly and doesn't throw any exception, it was the next line that was throwing the exception.

// works perfectly
if (Environment.UserDomainName == Environment.MachineName)
local = true;

// throws a domaincontroller exception when local:
Domain domain = Domain.GetCurrentDomain();

Thank you for your help,

Glenn

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payne173 · Answer 1 · 2014-05-13T20:54:00

Solution 1

Please Try with WMI Query.Hope it does...

http://blogs.msdn.com/b/alejacma/archive/2008/03/04/how-to-get-the-logged-on-user-with-wmi-vbscript.aspx[^]

Posted 13-May-14 20:54pm

payne173

Updated 13-May-14 20:55pm

v2