ActivEarth.DAO.UserDAO.GetUserIdFromUserName C# (CSharp) 메소드

        public static int GetUserIdFromUserName(string username)
        {
            using (SqlConnection connection = ConnectionManager.GetConnection())
            {
                var data = new ActivEarthDataProvidersDataContext(connection);
                return
                    (from u in data.UserDataProviders
                     where u.user_name == username
                     select u.id).FirstOrDefault();
            }
        }