Searching the Directory

Using the DirectorySearcher class, you can find specific Active Directory objects. The following is an example of searching the Active Directory for the user account Administrator.

Code Example: Searching Active Directory

using System;
using System.DirectoryServices;
using System.Windows.Forms;

namespace UnumTest
{
public class CloseClass
{


       static void Main(string[] args)
       {
              try
              {
                      DirectoryEntry oRoot = new DirectoryEntry("LDAP://RootDSE");
                       string searchOU =
                          (string)oRoot.Properties["defaultnamingcontext"].Value;
                       DirectoryEntry de =
                          new DirectoryEntry("LDAP://CN=Users," + searchOU);
                       Console.WriteLine(oRoot.Name);
                       oRoot.Close();

                       DirectorySearcher search = new DirectorySearcher(de);
                       search.Filter = "(CN=Administrator)";
                       search.PropertiesToLoad.Add("distinguishedName");
                       SearchResultCollection results = search.FindAll();

                       string strRet="Not Found";
                       foreach(SearchResult result in results)
                       {
                              DirectoryEntry data = result.GetDirectoryEntry();
                              strRet =
                              (string)data.Properties["distinguishedName"].Value;
                              Console.WriteLine(strRet);
                              data.Close();
                       }
                       de.Close();
                       results.Dispose()
                      //Required or you may leak TCP connections
                }
                catch(Exception e)
                {
                      Console.WriteLine( e.Message);
                }
           }
      }
}