//handle cell click event
private void ChangeQuantity(object sender, DataGridViewCellEventArgs e)
{
const int QUANTITY_INDEX = 4;
const int TOTAL_PRICE_INDEX = 5;
if (e.ColumnIndex == QUANTITY_INDEX)
{
int newQuantity = int.Parse(this._orderList.Rows[e.RowIndex].Cells[QUANTITY_INDEX].Value.ToString());
int result = _itemOrder.UpdateQuantity(e.RowIndex, newQuantity);
if (newQuantity != result)
{
const string STOCK_STATUS = "庫存狀態";
const string STOCK_NOT_ENOUGH = "庫存不足";
MessageBox.Show(STOCK_NOT_ENOUGH, STOCK_STATUS);
}
this._orderList.Rows[e.RowIndex].Cells[QUANTITY_INDEX].Value = result.ToString();
this._orderList.Rows[e.RowIndex].Cells[TOTAL_PRICE_INDEX].Value = _itemOrder.GetItemTotalPrice(e.RowIndex).ToString(Constants.NUMBER_BREAK_KEY_WORD);
this._totalPrice.Text = TOTAL_PRICE_STRING + _itemOrder.GetTotalPrice().ToString(Constants.NUMBER_BREAK_KEY_WORD) + MONEY_UNIT;
}
}
