Retrieving User Name from Active Directory

Question

I am trying to retrieve the User Name from Active Directory. I have found this piece of code to try however, it does not recognize the User portion of User.Identity.Name. I have looked to see if I need to add another reference or assembly however I have not seen anything. Is there a better way of getting the User Name from Active Directory?

static string GetUserName(){

        string name = "";
        using (var context = new PrincipalContext(ContextType.Domain))
        {
            var usr = UserPrincipal.FindByIdentity(context, User.Identity.Name);
            if (usr != null)
                name = usr.DisplayName;
        }

    }

Igor Quirino · Accepted Answer · 2016-11-23T21:25:01.077

1

You can use WindowsIdentity.GetCurrent

using System.Security.Principal;

static string GetUserName()
{
    WindowsIdentity wi = WindowsIdentity.GetCurrent();

    string[] parts = wi.Name.Split('\\');

    if(parts.Length > 1) //If you are under a domain
        return parts[1];
    else
        return wi.Name;
}

Usage:

string fullName = GetUserName();

Happy to help you!

edited Nov 23 '16 at 21:25

answered Nov 23 '16 at 18:39

Igor Quirino

1,187
13
28

For some reason when I try this the `wi` in `wi.Name.Split` is not recognized – Ethel Patrick Nov 23 '16 at 19:24
Are you referencing "using System.Security.Principal;"? – Igor Quirino Nov 23 '16 at 19:30
yes I am reference it. It say - a field initializer cannot reference the non-static field, method, or property 'OpenBurn.Controllers.RequestBurnsController.wi' – Ethel Patrick Nov 23 '16 at 19:35
Please post your entire class. Error is on another point of code. – Igor Quirino Nov 23 '16 at 19:43
How would I call GetUserName() to get wi.Name in my controller? – Ethel Patrick Nov 23 '16 at 21:19
Just call GetUserName() and get the username. – Igor Quirino Nov 23 '16 at 21:20
when I do that I get a message saying that "Method Must have a return Type". I thought I might be doing something wrong – Ethel Patrick Nov 23 '16 at 21:38
your method return a string and you forgot to return... you never returned. [**Add "return name;" to your code.**] – Igor Quirino Nov 23 '16 at 22:08

score 0 · Answer 2 · answered Nov 23 '16 at 21:01

How about:

public string GetUserName()
{
    string name = "";

    using (var context = new PrincipalContext(ContextType.Domain))
    {
        var usr = UserPrincipal.Current;

        if (usr != null)
        {
            name = usr.DisplayName;
        }
    }
}

Retrieving User Name from Active Directory

2 Answers2