/// <summary>
/// 登陆情况下的购物车
/// </summary>
private void OnlineCart()
{
int productId;
if (Int32.TryParse(Request["item"], out productId))
{
Books b = bookbll.QuerySingle(productId);
if (b != null)
{
// db 判断购物车中是否已存在该商品
Cart exist = cartbll.QuerySingle(new { BookId = productId, __o = "and", UserId = CurrentUser.Id });
if (exist != null)
{
// 如果已经存在
exist.Count += 1;
cartbll.Update(exist);
}
else
{
// 创建一个购物车对象加入到购物车表中
exist = new Cart();
exist.BookId = b.Id; // cart是否可能已经存在
exist.UserId = CurrentUser.Id;
exist.Count = 1;
cartbll.Insert(exist);
}
}
}
CartList = cartbll.GetCartInfos(CurrentUser.Id);
}
protected void Page_Load(object sender, EventArgs e)
{
int item;
Int32.TryParse(Request["item"], out item);
if (item == 0)
{
// 没有找到资源
throw new HttpException(404, "Not Found");
}
// 调用业务层方法查询实体
CurrentBook = bll.QuerySingle(item);
if (CurrentBook == null)
{
// 没有找到资源
throw new HttpException(404, "Not Found");
}
}
