public string DeletePOMASTER(string POMASTERCode)
        {
            string Result = "Success";

            try
            {
                Purchase_Order_Processing_System.POMASTER _POMASTER = poDb.POMASTERs.Where(x => x.PONO == POMASTERCode).ToList().FirstOrDefault();
                poDb.POMASTERs.Remove(_POMASTER);
                poDb.SaveChanges();
            }
            catch (Exception ex)
            {
                Result = ex.Message;
            }
            return(Result);
        }
        public string UpdatePOMASTER(POMASTER _POMASTER)
        {
            string Result = "Success";

            try
            {
                Purchase_Order_Processing_System.POMASTER _pomaster = poDb.POMASTERs.Where(x => x.PONO == _POMASTER.PONO).ToList().FirstOrDefault();
                _pomaster.PODATE    = _POMASTER.PODATE;
                _pomaster.PODETAILs = _POMASTER.PODETAILs;
                _pomaster.SUPLNO    = _POMASTER.SUPLNO;
                _pomaster.SUPPLIER  = _POMASTER.SUPPLIER;

                poDb.SaveChanges();
            }
            catch (Exception ex)
            {
                Result = ex.Message;
            }
            return(Result);
        }