public void AddItem(RestaurantsMenu items)
{
int index;
if (order.Contains(items))
{
index = order.IndexOf(items);
order[index].quantity++;
order.Remove(items);
order.Insert(index, items);
dataGridOrder.ItemsSource = order;
subTotal += order[index].Price;
TxtSub.Text = $"{subTotal:c}";
tax = subTotal * 0.13;
txttax.Text = $"{tax:c}";
Total = subTotal + tax;
txtTotal.Text = $"{Total:c}";
}
else
{
order.Add(items);
index = order.IndexOf(items);
order[index].quantity++;
dataGridOrder.ItemsSource = order;
subTotal += order[index].Price;
TxtSub.Text = $"{subTotal:c}";
tax = subTotal * 0.13;
txttax.Text = $"{tax:c}";
Total = subTotal + tax;
txtTotal.Text = $"{Total:c}";
}
}
private void CbAppetizer_DropDownClosed(object sender, EventArgs e)
{
if (AppetizerCombo.SelectedItem != null)
{
RestaurantsMenu item = (RestaurantsMenu)AppetizerCombo.SelectedItem;
AddItem(item);
}
}
private void CbDessert_DropDownClosed(object sender, EventArgs e)
{
if (DessertCombo.SelectedItem != null)
{
RestaurantsMenu item = (RestaurantsMenu)DessertCombo.SelectedItem;
AddItem(item);
}
}
private void CbMainCourse_DropDownClosed(object sender, EventArgs e)
{
if (MainCombo.SelectedItem != null)
{
RestaurantsMenu item = (RestaurantsMenu)MainCombo.SelectedItem;
AddItem(item);
}
}
private void CbBeverage_DropDownClosed(object sender, EventArgs e)
{
if (beverageCombo.SelectedItem != null)
{
RestaurantsMenu item = (RestaurantsMenu)beverageCombo.SelectedItem;
AddItem(item);
}
}
private void btRemove_Click(object sender, RoutedEventArgs e)
{
if (dataGridOrder.SelectedIndex >= 0)
{
RestaurantsMenu menu = (RestaurantsMenu)dataGridOrder.SelectedItem;
subTotal -= menu.Price;
subtxt.Text = "$" + Convert.ToString(subTotal);
taxT.Text = "$" + Convert.ToString(Math.Round(subTotal * 0.13, 2));
txtTotal.Text = "$" + Convert.ToString(Math.Round(subTotal * 1.13, 2));
order.RemoveAt(dataGridOrder.SelectedIndex);
}
}
