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//如:
Session["orders"] = hs; //key-->id,value-->Orders
string curId = tempStr;
if(hs.Keys.Contains(curId))
{
((Orders)hs[curId]).BuyCount += 1; //Orders是购物车中的订单实体类
}
else
{
hs.Add(curId,temOrders);
}
Session["orders"] = hs;