public bool addDonHang(string ten, int sdt, string diachi, int soluong, float tongtien)
{
DonHang a = new DonHang();
a.TenKH = ten;
a.SDT = sdt;
a.DiaChi = diachi;
a.SoLuong = soluong;
a.TongTien = tongtien;
justshop.DonHangs.Add(a);
justshop.SaveChanges();
return(true);
}
public int getmadonhang()
{
DonHang a = (from c in justshop.DonHangs orderby c.MaDonHang descending select c).Take(1).SingleOrDefault();
return(a.MaDonHang);
}
public string getTenkH(int id)
{
DonHang a = (from c in justshop.DonHangs where c.MaDonHang == id select c).SingleOrDefault();
return(a.TenKH);
}