索取AD帳號的語法

using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;


public static string strLDAP = "LDAP://" + System.Configuration.ConfigurationManager.AppSettings["AD_HOST"] + "/OU=xxx,OU=xxx,dc=xxx,dc=xxx";         

LogonName = UserPrincipal.Current.SamAccountName;
            DirectoryEntry entry = null;
            entry = new DirectoryEntry(strLDAP);
            DirectorySearcher searcher = new DirectorySearcher(entry);
            searcher.Filter = "(&(objectClass=User)(name=" + LogonName + "))";
            searcher.PropertiesToLoad.AddRange(new string[] { "xx", "xxx", "xxxx", "xxxxx", "x" });
            SearchResult result = searcher.FindOne();

            ResultPropertyCollection propColl = result.Properties;
                    if (propColl["name"].Count > 0)
                        ViewData["name"] = propColl["name"][0].ToString();
                    if (propColl["department"].Count > 0)
                        ViewData["department"] = propColl["department"][0].ToString();
                    if (propColl["displayname"].Count > 0)
                        ViewData["displayname"] = propColl["displayname"][0].ToString();