public void AttachPromotionToItem(Item item, Promotion promotion) {
if (item == null || promotion == null) {
throw new ArgumentException(ERROR_MSG_CANNOT_ATTACH_NULL_ITEM_OR_PROMOTION);
}
if (DoesCartContainItem(item)) {
LineItem lineItem = GetLineItemForItem(item);
lineItem.Promotion = promotion;
}
}
private void button1_Click(object sender, EventArgs e)
{
txtTotal.Text = "0";
var obj = orders.FirstOrDefault(p => p.productId.ToString() == comboBox1.SelectedValue.ToString());
if (obj != null)
{
obj.qty = obj.qty + int.Parse(txtQty.Text);
}
else
{
orders.Add(
new Order {
id = decimal.Parse(DateTime.Now.ToString("ddMMyyyyhhmmss")), productId = int.Parse(comboBox1.SelectedValue.ToString()), qty = int.Parse(txtQty.Text.ToString())
}
);
}
double calAmt = 0;
foreach (var item in orders)
{
Promotion pro = promotions.Find((Promotion p) => p.productId == item.productId);
#region
//IEnumerable<Promotion> pro = promotions.Where(p => p.productId == item.productId).OrderBy(p => p.productId);
//foreach (var item2 in pro)
//{
//}
//var pro = promotions
// .Where(p => p.productId == item.productId)
// .OrderBy(p => p.productId)
// .Select(p => p);
#endregion
Product product = products.Find((Product pr) => pr.id == item.productId);
if (pro == null)
{
for (int i = 0; i < item.qty; i++)
{
calAmt += product.price;
}
}
else
{
int actualDiscount = 0;
int remainingQty = 0;
remainingQty = checkPromotionItems(item.qty, pro.promotionItems, out actualDiscount);
calAmt = calculateAmt(remainingQty, pro.promotionItems, pro.specialPrice, product.price, actualDiscount);
remainingQty = 0;
actualDiscount = 0;
}
txtTotal.Text = (double.Parse(txtTotal.Text) + calAmt).ToString();
}
}