Determine User Name at Runtime

dgarner · July 16th, 2003, 07:44 PM

I am writing an intranet application which has a welcome screen which needs to determine the user name of the person logged into the computer accessing the site.

What .net technology do I need to use.

DirectoryServices? (That only lets me manipulate the Active Directory, not determine the current logged in user.)

Environment.UserName? (That only returns the user who started the current process which is an IIS account, not the logged in user.)

Any help? I'd really appreciate it.

David Garner

NotNowJohn · July 17th, 2003, 01:46 AM

Code:

using System.Security.Principal;
...
WindowsIdentity MyIdentity = WindowsIdentity.GetCurrent();
WindowsPrincipal MyPrincipal = new WindowsPrincipal(MyIdentity);
string userName = MyPrincipal.Identity.Name;

...but the Soon is eclipsed by the Moon

dgarner · July 17th, 2003, 02:23 PM

Thanks NotNowJohn.

That doesn't quite do it. This is an intranet application. Not a windows form. The site is already secured and only company users can get in. They will all be on Windows Platform so they will all have a Windows Login.

The System.Security.Principal classes return the login name of the server running the app. Not the end user.

Your suggestion works for a windows form, but not a web application.

I may have to go with my second plan of attack and have the users enter their login criteria again (I had hoped to avoid that) and then look up their statistics in the Active Directory.

Any other suggestions? Anyone?

David Garner

NotNowJohn · July 17th, 2003, 03:34 PM

Have you configured your app to use Windows Authentication in Web.config file?

...but the Soon is eclipsed by the Moon

dgarner · July 17th, 2003, 04:07 PM

Yes, but now I turned off impersonation and that did the trick.

I also used HttpContext.Current.User to return an IWindowsPrincipal object instead.

Thanks for pointing me in the right direction. Without your help I'd still be mucking around with DirectoryEntries and Environment variables.

David Garner