private void buttonSave_Click(object sender, EventArgs e)
 {
     try
     {
         int     HotelDays = (dateTimePickerHotelTo.Value.Date - dateTimePickerHotelFrom.Value.Date).Days;
         decimal Price     = Convert.ToDecimal(dataGridViewTransport.SelectedRows[0].Cells[5].Value) +
                             Convert.ToDecimal(dataGridViewRooms.SelectedRows[0].Cells[4].Value) * HotelDays;
         ContractBindingModel model = new ContractBindingModel
         {
             Clientid         = Program.Client.Id,
             Hotelid          = HotelId.Value,
             Routeid          = RouteId.Value,
             Transportid      = TransportId.Value,
             Datefromhotel    = dateTimePickerHotelFrom.Value,
             Datetohotel      = dateTimePickerHotelTo.Value,
             Datefromtravel   = dateTimePickerTravelFrom.Value,
             Datetotravel     = dateTimePickerTravelTo.Value,
             Price            = Price,
             Countnumberhotel = 1
         };
         _logicC.CreateOrUpdate(model);
         MessageBox.Show("Успешно", "Сохранено",
                         MessageBoxButtons.OK, MessageBoxIcon.Information);
         Close();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.InnerException?.Message + "\n" + ex.Message, "Ошибка",
                         MessageBoxButtons.OK, MessageBoxIcon.Error);
         return;
     }
 }