public List <Det> getsubordinates(int id)
        {
            List <Det>    dd  = new List <Det>();
            loginEntities obj = new loginEntities();

            var rec = from e in obj.data
                      where e.id == id
                      select e;

            foreach (var e in rec)
            {
                int    i    = int.Parse(e.id.ToString());
                string name = e.name.ToString();
                Det    d    = new Det(i, name);
                dd.Add(d);
            }
            return(dd);
        }
        public int login(string username, string password)
        {
            loginEntities ctx = new loginEntities();

            /*var rec = from e in obj.logins
             *        select e;
             * var id = from e in rec where e.username == username && e.password == password select new { i = e.id};
             * Console.WriteLine(id);
             * int i = int.Parse(id.ToString());*/

            var obj = from i in ctx.logins
                      where i.username == username && i.password == password
                      select i;
            var elm = obj.FirstOrDefault();

            if (elm != null)
            {
                return(elm.id);
            }
            else
            {
                return(-1);
            }
        }