Read User Properties From Active Directory

Read User Properties From Active Directory:-

lblMessage.Text = GetEmployeeID("name@company.com"); 

internal static string GetEmployeeID (string strmail)

        {

            StringBuilder sbQuery = new StringBuilder();

            string stremployeeid = string.Empty;           

            string strLdapPath = "LDAP://DC=company_domain,DC=com";

            try

            {

                if (string.IsNullOrEmpty(Convert.ToString(sbQuery)))

                {

                    sbQuery.Append("(&(objectClass=user)(|(mail=" + strmail + ")");

                }

                sbQuery.Append("))");

                DirectoryEntry entry = new DirectoryEntry(strLdapPath);

                DirectorySearcher userSearch = new DirectorySearcher(entry);

                userSearch.Filter = Convert.ToString(sbQuery);

                userSearch.PropertiesToLoad.Add("mail");

                userSearch.PropertiesToLoad.Add("employeeid");

                SearchResultCollection sresultcoll = userSearch.FindAll();

                foreach (SearchResult sresult in sresultcoll)

                {

                    if (sresult != null)

                    {

                        if (sresult.Properties["mail"].Count == 1)

                        {

                            stremployeeid = sresult.Properties["employeeid"].Count > 0 ?Convert.ToString(sresult.Properties["employeeid"][0]) : string.Empty;

                            if (stremployeeid != null && stremployeeid.Length > 0)

                            {

                                return stremployeeid;

                            }

                        }

                    }

                }

            }

            catch (Exception ex)

            {

            }

            return stremployeeid;

        }