public int update(string matt, string magv, DateTime ngaynhan, int tinhtrang)
        {
            try
            {
                using (QLTTEntities qltt = new QLTTEntities())
                {
                    TT_LUONGGV data = qltt.TT_LUONGGV.Where(p => p.MATT == matt).FirstOrDefault();
                    if (data != null)
                    {
                        data.MATT      = matt;
                        data.MAGV      = magv;
                        data.NGAYNHAN  = ngaynhan;
                        data.TINHTRANG = tinhtrang;
                        qltt.SaveChanges();

                        return(1);
                    }

                    return(0);
                }
            }
            catch
            {
                return(0);
            }
        }
 public int delete(string code)
 {
     using (QLTTEntities qltt = new QLTTEntities())
     {
         TT_LUONGGV data = qltt.TT_LUONGGV.Where(p => p.MATT == code).FirstOrDefault();
         if (data != null)
         {
             qltt.TT_LUONGGV.Remove(data);
             qltt.SaveChanges();
             return(1);
         }
     }
     return(0);
 }
        public DataTable get(string code)
        {
            using (QLTTEntities qltt = new QLTTEntities())
            {
                TT_LUONGGV data = qltt.TT_LUONGGV.Where(p => p.MATT == code).FirstOrDefault();
                if (data != null)
                {
                    DataTable rtnTable = new DataTable();
                    rtnTable.Columns.Add("MATT", typeof(string));
                    rtnTable.Columns.Add("MAGV", typeof(string));
                    rtnTable.Columns.Add("NGAYNHAN", typeof(DateTime));
                    rtnTable.Columns.Add("TINHTRANG", typeof(int));

                    rtnTable.Rows.Add(data.MATT, data.MAGV, data.NGAYNHAN, data.TINHTRANG);
                    return(rtnTable);
                }
            }
            return(null);
        }
        public int insert(string matt, string magv, DateTime ngaynhan, int tinhtrang)
        {
            try
            {
                using (QLTTEntities qltt = new QLTTEntities())
                {
                    TT_LUONGGV data = new TT_LUONGGV()
                    {
                        MATT      = matt,
                        MAGV      = magv,
                        NGAYNHAN  = ngaynhan,
                        TINHTRANG = tinhtrang
                    };
                    qltt.TT_LUONGGV.Add(data);
                    qltt.SaveChanges();

                    return(1);
                }
            }
            catch
            {
                return(0);
            }
        }