How to get domain user's first name, last name and e-mail address

Hi everyone,

I am able to retrieve the domain/user ID by setting <authentication mode="Windows"/> in the Web.config file, and with the following code in my Default.aspx.,cs page:

string strName = Request.ServerVariables["AUTH_USER"];

I would also like to retrieve the users first name, last name and e-mail address from their domain profile, if possible.  Can anyone help me with a code example?  I'm somewhat new to C#/.NET/OOP so if you have it in "C# for Dummies" format, I would be very thankful! Smile

Thanks in advance for any help that is provided!

4/20/2009 3:41:20 PM 27051 articles. 1 followers. Follow

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Check out this thread:

Specifically 2nd post in that thread by guru_5F00_sarkar.

Jack Yang
.NET Developer
4/20/2009 7:30:23 PM

Request.ServerVariables : This is for checking who is trying to log into your application from the server. If you want to get information of the users from domain (LDAP), you can refer to what jack said above. You can't get email address and other information from server variables.

Surya Prakash Jayanti

p.s. Please click "Mark as Answer" if you think this post answered your question
4/20/2009 7:48:03 PM

Thanks Jack!  I gave it a try using the code as is, but it doesn't like:

      using (DirectoryEntry root = new DirectoryEntry(rootQuery))


     searcher.Filter = searchFilter;

 VS.NET says that rootQuery and searchFilter do not exist in the current context.  Any ideas?  I think I'm close!




4/20/2009 9:24:08 PM

Brad, there maybe various reasons that you cannot access certain DirectoryEntry.

First check if rootQuery is defined, an example of how it is look like:  

"LDAP:// Hamilton,OU=Developers,OU=Accounts,DC=developer,DC=hamilton,DC=com"
More examples can be found here:

Secondly, make sure your LDAP access account has enough privilege to actually query the ActiveDirectory. Usually we define a service account and impersonate this special account to traverse ActiveDirectory. See ref:

Or it could be settings inside IIS need to be adjusted properly:

Jack Yang
.NET Developer
4/21/2009 1:23:09 AM

Thanks again Jack.  Your help is greatly appreciated!

4/21/2009 3:52:53 PM

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