public bool SuaPhiThang(ref string err, int Thang1, int Nam1, string LoaiPhi, string LoaiPhiCu, decimal Gia) { bool f = false; try { dbs.SP_SuaPhiThang(Thang1, Nam1, LoaiPhi, LoaiPhiCu, Gia); f = true; } catch (Exception ex) { err = ex.Message; } return(f); }