public bool themChamCong(ChamCong_PDA cc) { if (!db.ChamCong_PDAs.Contains(cc)) { db.ChamCong_PDAs.InsertOnSubmit(cc); db.SubmitChanges(); return(true); } return(false); }
public bool xoaChamCong(string maNV, int thang, int nam) { ChamCong_PDA b = new ChamCong_PDA(); b = db.ChamCong_PDAs.Single(a => a.thang == thang && a.nam == nam && a.maNhanVien == maNV); if (b != null) { db.ChamCong_PDAs.DeleteOnSubmit(b); db.SubmitChanges(); return(true); } return(false); }