LDAP active directory search in c#

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C#

public string GetGroups()
        {

            DirectorySearcher search = new DirectorySearcher(_path);

            //search.Filter = "(&(objectclass=group))";//(cn=%s*)
            search.Filter = "(CN=" + _filterAttribute + ")";
           // search.Filter = "(samaccountname=" + username + ")";
            //search.PropertiesToLoad.Add("memberof");
            StringBuilder groupNames = new StringBuilder();


            try
            {

                SearchResult result = search.FindOne();
                int propertyCount = result.Properties["memberof"].Count;
                String dn;
                int equalsIndex, commaIndex;

                for (int propertyCounter = 0; propertyCounter < propertyCount;
                     propertyCounter++)
                {
                    dn = (String)result.Properties["memberof"][propertyCounter];

                    equalsIndex = dn.IndexOf("=", 1);
                    commaIndex = dn.IndexOf(",", 1);
                    if (-1 == equalsIndex)
                    {
                        return null;
                    }
                    groupNames.Append(dn.Substring((equalsIndex + 1),
                                      (commaIndex - equalsIndex) - 1));
                    groupNames.Append("|");
                }
            }
            catch (Exception ex)
            {
                throw new Exception("Error obtaining group names. " +
                  ex.Message);
            }
            return groupNames.ToString();
        }
    }

hi i m working with active directory lDAP ..i m in a problem that it does not search for the group name ...and in it give search scope function evalutin time out ..plz help me ..i m new to it....

Posted 4-Feb-13 1:01am

Member 8959491

Updated 4-Feb-13 1:11am

Abhishek Pant

v2

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Kiran Susarla · Accepted Answer · 2013-02-04T17:12:00

Here you go with the method that returns all the group names from AD.
All the best.

C#

            string serverName = string.Empty;
            GlobalCatalog gcServer = null;
            DomainController dc = null;
            try
            {
                dc = DomainController.FindOne(new DirectoryContext(DirectoryContextType.Domain));
                //gcServer = GlobalCatalog.FindOne(new DirectoryContext(DirectoryContextType.Forest));
                serverName = dc.Name;
                //txtProgress.AppendText("\r\nFound Server..." + serverName);
                
            }
            catch (ActiveDirectoryObjectNotFoundException)
            {
                //this.txtProgress.AppendText("Could not find a Global Catalog.");
                return;
            }

            var groups = GetAllGroupNames(serverName);
....
....
private List<string> GetAllGroupNames(string serverName)
        {
            List<string> groups = new List<string>();
            LdapConnection conn=null;
            int defaultADPageSize = 500;
            int pageCount = 0;
            try
            {
                conn = GetLDAPConnection(serverName);
                string[] propertiesToQuery = { "distinguishedname", "objectguid", "member", "memberof", "objectClass" };
                SearchRequest request = new SearchRequest(
                                                null,
                                                ActiveDirectoryGroupFilterQuery2,
                                                System.DirectoryServices.Protocols.SearchScope.Subtree,
                                                propertiesToQuery);
                // Set the result page size
                PageResultRequestControl requestPageSize = new PageResultRequestControl(defaultADPageSize);
                
                request.Controls.Add(requestPageSize);
                while (true)
                {
                    PageResultResponseControl pageResponse = null;

                    SearchResponse results = (SearchResponse)conn.SendRequest(request);

                    if (null == results)
                    {
                        break;
                    }
                    pageCount++;

                    // verify support for this advanced search operation
                    if (results.Controls.Length != 1 ||
                        !(results.Controls[0] is PageResultResponseControl))
                    {
                        break;
                    }
                    // cast the diretory control into a PageResultResponseControl object.
                    pageResponse = (PageResultResponseControl)results.Controls[0];
                    if (results.Entries.Count > 0)
                    {
                        foreach (SearchResultEntry searchResult in results.Entries)
                        {
                            SearchResultAttributeCollection attColl = searchResult.Attributes;
                            groups.Add(attColl["distinguishedname"][0].ToString());
                        }

                        // if this is true, there are no more pages to request
                        if (pageResponse != null && pageResponse.Cookie.Length == 0)
                        {
                            break;
                        }

                        // set the cookie of the pageRequest equal to the cookie of the pageResponse to
                        // request the next page of data in the send request
                        if (pageResponse != null)
                        {
                            requestPageSize.Cookie = pageResponse.Cookie;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                if (conn != null)
                {
                    conn.Dispose();
                }
            }
            return groups;
        }

private LdapConnection GetLDAPConnection(string server)
        {
            LdapConnection conn = new LdapConnection(string.Format("{0}:{1}", server, "3268"));
            conn.Credential = CredentialCache.DefaultNetworkCredentials;
            conn.AuthType = AuthType.Negotiate;
            conn.SessionOptions.Sealing = true;
            conn.SessionOptions.Signing = true;
            conn.Bind();
            return conn;
        }
</string></string></string>