//Add To DB Table
        public bool AddDB(DB d)
        {
            try
            {
                db.DBs.InsertOnSubmit(d);
                db.SubmitChanges();
                return true;
            }

            catch (Exception error)
            {
                return false;
            }
        }
        //Edit DB Table
        public int EditDB(DB d)
        {
            try
            {
                var v = from i in db.DBs
                        where i.dbCode == d.dbCode
                        select i;
                DB newdb = v.FirstOrDefault();
                if(newdb != null)
                {
                    newdb = d;
                    db.SubmitChanges();
                    return 1;
                }
                return 0;//not found

            }
            catch (Exception error)
            {
                return -1;
            }
        }
 partial void UpdateDB(DB instance);
 partial void DeleteDB(DB instance);
 partial void InsertDB(DB instance);