public bool updatebm(string ma, string ten) { tlb_bomon bm = timbm(ma); bm.ten_bn = ten; try { db.SubmitChanges(); } catch { return(false); } return(true); }
public bool deletebm(string ma, string ten) { tlb_bomon bm = timbm(ma); db.tlb_bomons.DeleteOnSubmit(bm); try { db.SubmitChanges(); } catch { return(false); } return(true); }
public bool thembm(string mabm, string ten) { tlb_bomon tb = new tlb_bomon(); tb.ma_bm = mabm; tb.ten_bn = ten; db.tlb_bomons.InsertOnSubmit(tb); try { db.SubmitChanges(); } catch { return(false); } return(true); }