Active Directory Searching

Hi,

I am using two different methods to search active directory and I notice that the first method fnADSearch1() does not return a full result set. I seems to return a number between 600 and 800 Ou's. Where as using fnADSearch2() always returns the correct 3550. So, I would like to find out how to adjust the code of fnADSearch1() so I return a full result set each time.

Thanks,

Ward

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.DirectoryServices;
using System.DirectoryServices.Protocols;
using System.Net;


// Paging in System.DirectoryServices.Protocols
// http://dunnry.com/blog/PagingInSystemDirectoryServicesProtocols.aspx


namespace ADTest
{
    class Program
    {

        public static List<SearchResultEntry> fnPerformPagedSearch(
        LdapConnection connection,
        string baseDN,
        string filter,
        string[] attribs)
        {

            List<SearchResultEntry> results = new List<SearchResultEntry>();
            PageResultRequestControl prc = null;

            SearchRequest request = null;
            try
            {
                request = new SearchRequest(
                baseDN,
                filter,
                System.DirectoryServices.Protocols.SearchScope.Subtree,
                attribs
                );

                request.TimeLimit = new TimeSpan(2, 0, 0);
                request.SizeLimit = 1000000;
            }

            catch (Exception ex)
            {
                Console.WriteLine("Building SeaechRequest");
                Console.WriteLine(ex.ToString());
            }


            try
            {
                prc = new PageResultRequestControl(1000);
            }

            catch (Exception ex)
            {
                Console.WriteLine("Creating prc");
                Console.WriteLine(ex.ToString());
            }

            //add the paging control

            request.Controls.Add(prc);

            try
            {
                while (true)
                {
                    TimeSpan timeout = new TimeSpan(2, 0, 0);
                    SearchResponse response = connection.SendRequest(request, timeout) as SearchResponse;
                    //find the returned page response control
                    foreach (DirectoryControl control in response.Controls)
                    {

                        if (control is PageResultResponseControl)
                        {
                            //update the cookie for next set

                            prc.Cookie = ((PageResultResponseControl)control).Cookie;
                            break;
                        }
                    }


                    //add them to our collection

                    foreach (SearchResultEntry sre in response.Entries)
                    {
                        results.Add(sre);
                    }

                    //our exit condition is when our cookie is empty

                    if (prc.Cookie.Length == 0)
                        break;

                }

                return results;
            }

            catch (LdapException ldapex)
            {
                Console.WriteLine("");
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("Exception: \n");
                Console.WriteLine(ldapex.ToString());
                Console.ResetColor();
                return results;
            }

            catch (Exception ex)
            {
                Console.WriteLine("");
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("Exception: \n");
                Console.WriteLine(ex.ToString());
                Console.ResetColor();
                return results;
            }
        }


        static void fnADSearch1()
        {
            DateTime start = DateTime.Now;
            Console.WriteLine("ADSearch1");
            string connection_path = "acme.net";

            string baseDN = "DC=acme,DC=net";
            List<SearchResultEntry> ad_results = new List<SearchResultEntry>();

            LdapConnection connection = new LdapConnection(connection_path);
            connection.Timeout = new TimeSpan(2, 0, 0);

            string filter = "(objectClass=organizationalUnit)";

            string[] ad_attribs = new string[9];
            ad_attribs[0] = "name";
            ad_attribs[1] = "description";
            ad_attribs[2] = "objectGUID";
            ad_attribs[3] = "postalCode";
            ad_attribs[4] = "street";
            ad_attribs[5] = "st";
            ad_attribs[6] = "l";
            ad_attribs[7] = "c";
            ad_attribs[8] = "distinguishedName";

            Console.WriteLine("");
            ad_results = fnPerformPagedSearch(connection, baseDN, filter, ad_attribs);

            DateTime end = DateTime.Now;

            if (ad_results.Count < 1)
            {
                Environment.Exit(1);
            }

            Console.WriteLine();

            Console.WriteLine("ADSearch1: OUs: {0}", ad_results.Count);
            TimeSpan duration = end - start;

            Console.WriteLine("");

            Console.WriteLine("ADSearch1 Time {0}:{1}:{2}\n", duration.Hours, duration.Minutes, duration.Seconds);
        }

        static void fnADSearch2()
        {

            try
            {
                DateTime start = DateTime.Now;
                Console.WriteLine("ADSearch2");

                string starting_path = "LDAP://DC=acme,DC=net";

                DirectoryEntry BaseOU = new DirectoryEntry(starting_path);
                string filter = "(objectClass=organizationalUnit)";

                DirectorySearcher searcher = new DirectorySearcher(BaseOU, filter);

                searcher.PageSize = 1000;
                searcher.SizeLimit = 10000000;
                searcher.ServerTimeLimit = new TimeSpan(2, 0, 0);
                searcher.ClientTimeout = new TimeSpan(2, 0, 0);

                searcher.PropertiesToLoad.Add("name");
                searcher.PropertiesToLoad.Add("description");
                searcher.PropertiesToLoad.Add("objectGUID");
                searcher.PropertiesToLoad.Add("postalCode");
                searcher.PropertiesToLoad.Add("street");
                searcher.PropertiesToLoad.Add("st");
                searcher.PropertiesToLoad.Add("l");
                searcher.PropertiesToLoad.Add("c");
                searcher.PropertiesToLoad.Add("distinguishedName");

                // public string objectGUID = null;


                SearchResultCollection ad_results = searcher.FindAll();

                DateTime end = DateTime.Now;

                Console.WriteLine("ADSearch2: OUs {0}", ad_results.Count);
                TimeSpan duration = end - start;

                Console.WriteLine("");

                Console.WriteLine("ADSearch2 Time {0}:{1}:{2}", duration.Hours, duration.Minutes, duration.Seconds);

            }

            catch
            {
            }
        }


        static void Main(string[] args)
        {
            Console.WriteLine("");
            fnADSearch1();
            fnADSearch2();
        }
    }


}

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