//根据用户购物车商品计算总价
public decimal TotalPrice(int uid)
{
decimal totalPrice = 0;
var cartItems = cartService.GetCartItemsByUserId(uid);
if (cartItems.Count != 0)
{
foreach (var cart in cartItems)
{
totalPrice += decimal.Parse((cart.ProPrice * cart.ProQty).ToString());
}
}
return(totalPrice);
}