public static void UpdateChiTietBan(ChiTietBanModel ctb)
 {
     using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
     {
         cnn.Execute("update chitietban set SOLUONG=@SoLuong,THANHTIEN=@ThanhTien WHERE MAPHIEUMUAHANG = @maPhieuMuaHang and MASP = @maSP", ctb);
     }
 }
 public static void RemoveChiTietBan(ChiTietBanModel ctb)
 {
     using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
     {
         cnn.Execute("DELETE FROM CHITIETBAN WHERE MAPHIEUMUAHANG = @maPhieuMuaHang and MASP = @maSP", ctb);
     }
 }
 public static long SaveChiTietBan(ChiTietBanModel ctb)
 {
     using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
     {
         long lastRowID = (long)cnn.ExecuteScalar("insert into chitietban(MAPHIEUBAN,MASP,SOLUONG,THANHTIEN) values (@MaPhieuBan,@MaSP,@SoLuong,@ThanhTien); SELECT last_insert_rowid()", ctb);
         //lastRowID dùng để xác định ID của một hàng vừa được thêm vào.
         return(lastRowID);
     }
 }