How to get windows logged on os user name?


 In my old ASP.NET 1.1. code I have follwoing code in Page_Load of a certain page to get the os username if windows authentification checkbox is on in IIS 5.1

        Session("OSUsername") = Request.ServerVariables("REMOTE_USER")

 Now I have migrated the code to ASP.NET 2.0 and the Server Variable REMOTE_USER is empty, although windows authentification checkbox is on !!!

 How can I get OS username in ASP.NET 2.0?

Background of the code above: Normally there is a logon page to identify the user, but because it is an intranet application our customer do not want to logon,
so I catch the os username, save it in the sessions variable, and check the user rights against a database in the redirected page, so for the user it is one call,
but in background the os user name is taken for identification.

 Many thanks for your answer in advance!

7/5/2007 8:22:40 AM 27051 articles. 1 followers. Follow

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Hi there,

Try using User.Identity.Name to get the windows username. Since you have windows authentication enabled from IIS, you should be able to get the username.  I am not too sure about "Remote_User" property available on HTTP.

 However, if you are trying to obtain the username on Global.asax, then use Context.User.Identity.Name. 

Hope this helps,


7/5/2007 11:18:37 AM

Did you try Request.ServerVariables("LOGON_USER")  as well?

I'd also make sure double check that anonymous access is denied for the resource you are trying to access, as none of the user identity variables will be populated until the user is forced to authenticates to access a protected resource.

7/5/2007 3:51:03 PM

As suhash mentioned User.Identity.Name is what you would most likely use now but just for reference..

Session("OSUsername") = Request.ServerVariables("REMOTE_USER")
in .NET is now
Session["OSUsername"] = HttpRequest.ServerVariables["REMOTE_USER"];
The above code is in C# (cause that's what I know). 

7/5/2007 4:00:02 PM


What's your IIS authentication setting? When you enable Anonymous authentication in conjunction with Windows authentication or if you grant access to the Anonymous user in the <authorization> section while you are using any authentication mode other than None, other server variables such as AUTH_USER and REMOTE_USER (as well as the HttpContext.Current.User.Identity.Name property) also return an empty string.

Best Regards
XiaoYong Dai
Microsoft Online Community Support

Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
7/10/2007 2:31:57 AM

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