void PopulateOrders()
{
if (App.CheckoutItems == null)
{
return;
}
var foodItems = App.CheckoutItems.GroupBy(p => p.Id);
foreach (var item in foodItems)
{
var food = item.FirstOrDefault();
if (food == null)
{
continue;
}
var order = new OrderDetail {
FoodId = food.Id,
FoodName = food.Name,
Quantity = item.Count(),
SellingPrice = food.PricePerQty,
};
CheckoutItems.Add(new OrderDetailsViewModel(order, this));
}
if (CheckoutItems.Count <= 0)
{
return;
}
TotalPrice = CheckoutItems.Sum(p => p.Details.TotalPrice);
}
public void UpdateTotalPrice()
{
TotalPrice = CheckoutItems.Sum(p => p.Details.TotalPrice);
CalculateDiscount();
}