// Method to add an Item, we need the Product and Quantity
public virtual void AddItem(Product product, int quantity)
{
// check if the product already exist in the line collection
CartLine line = lineCollection
.Where(p => p.Product.ProductID == product.ProductID) // give me the product if there is one there already, that has the same ID as the product that I am trying to add.
.FirstOrDefault(); // if it is not found, it will return a new CartLine item
// we need to test
if (line == null) // this will not return anything because it is null, so we know we need to add to the collection
{
// code to Add new line to the CartLine
lineCollection.Add(new CartLine
{
Product = product,
Quantity = quantity
});
}
// if it finds a cartLine already, we just get that line and we add the quantity that is being added. it is automatically 1
else
{
line.Quantity += quantity;
}
}
public virtual void AddItem(Product product, int quantity)
{
// добавлял ли пользователь хотя бы один такой товар в корзину?
CartLine line = Lines
.Where(p => p.Product.ProductID == product.ProductID)
.FirstOrDefault();
// если нет - формируем модель пункта корзины и добавляем
// в список
if (line == null)
{
Lines.Add(new CartLine
{
Product = product,
Quantity = quantity
});
}
// иначе если такой товар уже встречается в корзине -
// увеличиваем его количество в модели пункта корзины
else
{
line.Quantity += quantity;
}
}
