void SuaThongTinKhach(KhachThue khachDaSua) { int vitriTimThay = ds.IndexOf(khachDaSua); if (vitriTimThay > 0) { ds[vitriTimThay] = khachDaSua; } }
void TaoCungDS() { KhachThue cd1 = new KhachThue(112, "KH01", 12, 1200, true); KhachThue cd2 = new KhachThue(113, "KH02", 13, 1201, false); KhachThue cd3 = new KhachThue(114, "KH03", 14, 1202, true); KhachThue cd4 = new KhachThue(115, "KH04", 15, 1203, false); objds.ThemKhachThue(cd1); objds.ThemKhachThue(cd2); objds.ThemKhachThue(cd3); objds.ThemKhachThue(cd4); }
public bool XoaKhachThue(KhachThue khach) { if (khach != null) { ds.Remove(khach); return(true); } else { return(false); } }
public bool ThemKhachThue(KhachThue khach) { if (ds.Contains(khach)) { return(false); } else { ds.Add(khach); return(true); } }