ASP.NET – Get User Name Under Windows Authentication

6 Comments  
by Byron Bennett / March 3rd, 2009

ASP.netGetting the authenticated user’s name when using Windows Authentication with ASP.NET is very simple.  I just keep having to go back to Google or dig out an old project to remember it, so here it is:

string username = User.Identity.Name.ToString();

Be sure to add the Security reference:

using System.Web.Security;

Thats it!

[UPDATE] Check out the comments below for some additional suggestions on getting the user name without the Domain name.

Byron

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Filed under: ASP.NET/C#

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Comments

  1. Brian Says:
    June 26th, 2009 at 12:18 pm

    Thanks for the help above though

    The above code returns the whole name including the computer name
    eg
    when i write those codes to my computer i gives me the following result

    BROMPO-379477BA\Brian

    But i just want to get Brian and not the whole string how will i do that???

  2. Byron Bennett Says:
    June 28th, 2009 at 12:20 am

    Brain,
    I’m not sure. I was getting the domain name when I was using it since I was on a LAN with Active Directory running. Since the domain was always the same for my app, I checked for it and replaced it. Sorry I don’t have the answer right now.

    BB

  3. Thang Says:
    July 3rd, 2009 at 3:15 am

    Hi Brian,
    You try with below code
    string strAccount = HttpContext.Current.User.Identity.Name.ToString();
    string strUserName = strAccount .Split(“\\”.ToCharArray())[1];

    have fun coding,
    BB

  4. AD Guy Says:
    July 9th, 2009 at 1:24 am

    DirectoryEntry dEntry = new DirectoryEntry(“WinNT://” + Environment.UserDomainName + “/” + Environment.UserName);
    return dEntry.Properties["fullName"].Value.ToString();

  5. Byron Bennett Says:
    July 9th, 2009 at 7:24 am

    @Thang, @AD Guy,

    Thanks for the hints!
    Byron

  6. Chuck Says:
    December 14th, 2009 at 3:05 pm

    Even easier to get the AD user name

    my.user.name

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