How to get details of address in Active Directory using UserPrincipal in C#

Question

I am busy with creating a search function into my GUI application who is running on my Windows Server to add, remove, update and search users. I am almost done building the application, but I can not solve the problem of getting details from an other property which is not given in UserPrincipal like the 'Address' property. How can I get into that property?

I have tried many coding style to get into the given property 'Address', but it still does not work.

Here is the code:

private void ListOfUsers(String ou)
{
    List<string> users = new List<string>();

    PrincipalContext ctx = new PrincipalContext(ContextType.Domain, "EMRE", "OU=" + ou + ",dc=emre,dc=han");
    UserPrincipal qbeUser = new UserPrincipal(ctx);
    PrincipalSearcher search = new PrincipalSearcher(qbeUser);


    foreach (UserPrincipal user in search.FindAll())
    {
        users.Add(user.UserPrincipalName);
        users.Add("********");
        users.Add(user.GivenName);
        users.Add(user.Surname);

        if (user.GetUnderlyingObjectType() == typeof(DirectoryEntry))
        {
            using (var entry = (DirectoryEntry)user.GetUnderlyingObject())
            {
                if (entry.Properties["Address"] != null)
                    users.Add(entry.Properties["Street"].Value.ToString());
            }
        }
        users.Add(user.VoiceTelephoneNumber);
        users.Add(user.EmailAddress);
        users.Add(ou);

    }

    string[] row = users.ToArray();
    var listViewItem = new ListViewItem(row);
    lstStudents.Items.Add(listViewItem);

}

I always get a null returned even the property is not null

Answer 1

The attribute you want is actually called streetAddress. You can also use Properties.Contains to check if the value exists (although the effect is really the same as checking for null, just easier to read).

if (entry.Properties.Contains("streetAddress"))
    users.Add(entry.Properties["streetAddress"].Value.ToString());

Personally, I like using DirectoryEntry/DirectorySearcher directly in general, rather than UserPrincipal/PrincipalSearcher because it gives me more control of what it's doing, which can translate into better performance. I wrote a bit about that here: Active Directory: Better performance