public int GetShoppingCartItemCount(Guid userID)
{
var user = userRepository.GetByKey(userID);
var shoppingCart = shoppingCartRepository.FindShoppingCartByUser(user);
if (shoppingCart == null)
{
throw new InvalidOperationException("没有可用的购物车实例。");
}
var shoppingCartItems = shoppingCartItemRepository.FindItemsByCart(shoppingCart);
return(shoppingCartItems.Sum(s => s.Quantity));
}
/// <summary>
/// 通过指定的用户及其所拥有的购物篮实体，创建销售订单。
/// </summary>
/// <param name="user">用户实体。</param>
/// <param name="shoppingCart">购物篮实体。</param>
/// <returns>销售订单实体。</returns>
public SalesOrder CreateSalesOrder(User user, ShoppingCart shoppingCart)
{
var shoppingCartItems = shoppingCartItemRepository.FindItemsByCart(shoppingCart);
if (shoppingCartItems == null ||
shoppingCartItems.Count() == 0)
{
throw new InvalidOperationException("购物篮中没有任何物品。");
}
var salesOrder = new SalesOrder();
salesOrder.SalesLines = new List <SalesLine>();
foreach (var shoppingCartItem in shoppingCartItems)
{
var salesLine = shoppingCartItem.ConvertToSalesLine();
salesLine.SalesOrder = salesOrder;
salesOrder.SalesLines.Add(salesLine);
shoppingCartItemRepository.Remove(shoppingCartItem);
}
salesOrder.User = user;
salesOrder.Status = SalesOrderStatus.Paid;
salesOrderRepository.Add(salesOrder);
repositoryContext.Commit();
return(salesOrder);
}