//bubbling add_to_cart button click event
private void AddToOrderClick(object sender, EventArgs e)
{
string id = _viewModel.GetCurrentItem();
_itemOrder.AddToOrder(id);
this._totalPrice.Text = TOTAL_PRICE_STRING + _itemOrder.GetTotalPrice().ToString(Constants.NUMBER_BREAK_KEY_WORD) + MONEY_UNIT;
this._orderList.Rows.Add(this._viewModel.GetItemRowInfo(id));
this._addToCart.Enabled = _viewModel.IsAddToCartEnable();
this._checkOut.Enabled = _itemOrder.IsCheckOutEnable();
}
