Get Domain User ID in ASP.NET

Question

I have a ASP.NET application where an employee logs into Windows and then they have to select their name from a long list of names and log in into the application.

What I want to do is as soon as the employee opens the application it selects their name from the drop down box.

I believe if I can get the Windows User Id on page load I can then make my code select the user depending on the Windows user that is logged in.

Question is. How do you get Windows User Id that is currently logged in in C# Asp.net? Any ideas.

What do you mean "windows user ID"? Microsoft account (something like "user@live.com"), domain user ( "mycompany\user"), local machine account ("mycomputer\mylocaluser") or even something else? (If asking for domain user - Rahul's answer have necessary bits, mostly in comments) — Alexei Levenkov, Aug 26 '13 at 21:15
Probably off topic, but why the user needs to select from a list anyway? With Integrated Windows Authentication, your asp.net app can identify the user already. What if user pick someone else name to login? — Ray Cheng, Aug 26 '13 at 21:45
@RayCheng the way it is now they select their name and input their password. I want them to skip that login process and log them in by domain user. — Apollo, Aug 27 '13 at 13:29

Rahul Tripathi · Answer 1 · 2013-08-26T21:36:52.550

9

Try this:-

System.Web.HttpContext.Current.User.Identity.Name

Also check this forum.

UPDATE:-

1) Please check that you have disabled anonymous mode in IIS

2) Also do check that you have set the application to autheticate the user details like this:-

 <authentication mode="Windows"/> 
    <authorization> 
       <allow users="*"/>
    </authorization>

or like this:-

  <authentication mode="Windows" /> 
     <authorization> 
        <deny users="?"/> 
     </authorization>

3) You can you can either configure IIS in Control Panel so that your site (or machine) uses Windows authentication and denies anonymous access

edited Aug 26 '13 at 21:36

answered Aug 26 '13 at 20:58

Rahul Tripathi

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@Apollo, can you be more specific when you say "doesn't work"? Crash? Empty string? Wrong name? – McKay Aug 26 '13 at 21:08
@Apollo:- Please check that you ave you disabled anonymous mode in IIS – Rahul Tripathi Aug 26 '13 at 21:08
@Apollo:- Also do check that you have set the application to autheticate the user details like this:- – Rahul Tripathi Aug 26 '13 at 21:09
@McKay I get an empty string. – Apollo Aug 26 '13 at 21:12
Rahul did you tried that line of code and confirmed that it worked in your end. – Apollo Aug 26 '13 at 21:14
@Apollo:- Yes it has worked for me!!! Could you try with Page.User.Identity.Name ?? – Rahul Tripathi Aug 26 '13 at 21:15
Rahul, this works in my localhost: but it does not work when I publish it. Any ideas why? – Apollo Aug 26 '13 at 21:20
Try changing your web.config:- – Rahul Tripathi Aug 26 '13 at 21:26
@Apollo:- Or you can either configure IIS in Control Panel so that your site (or machine) uses Windows authentication and denies anonymous access – Rahul Tripathi Aug 26 '13 at 21:27
I tried this HttpContext.Current.Request.LogonUserIdentity.Name; and it gives the user of the server NT AUTHORITY\IUSR. I will the config for IIS tomorrow when the admin is here. Thanks for the help – Apollo Aug 26 '13 at 21:33
I did that and get this Error: 401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission to view this directory or page using the credentials that you supplied. I disabled Anonymous authentication in IIS – Apollo Aug 27 '13 at 14:22

score 1 · Answer 2 · answered Jul 14 '14 at 20:22

I was having an related issue where my local build was recognizing the WindowsIdentity.GetCurrent().Name.ToString() value as my Windows account name, but when I accessed the website via a server it was always "DefaultAppPool".

I was able to get this to work by doing the following:

Open IIS and navigate to my website.
Under the IIS sections, double click "Authentication".
From there, disable "Anonymous Authentication" and "Forms Authentication".
Enable "Windows Authentication".

From there I was able to discern the user id/name and proceed with my coding. I had to rework a little bit, but it was well worth it. Thanks for the advice!

score -1 · Answer 3 · answered Feb 03 '22 at 15:52

-1

In ASP.NET Core .NET 6, I use

Environment.UserName;

// or // the following only work on Windows platform

System.Security.Principal.WindowsIdentity.GetCurrent().Name ;

answered Feb 03 '22 at 15:52

Sinji Yang

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This gets you the user of the currently running machine, not useful in a web app – gilliduck Mar 26 '22 at 01:22
@gilliduck What solution did you use? What would you recommend? – Sinji Yang Mar 27 '22 at 14:54

Get Domain User ID in ASP.NET

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