asp 购物车类

<% '购物车类 类名：UserCart '作者:gameing '基本原理:此类用服务器Session变量保存商品数据,商品用一个数组表示.此类里面保存了三中商品价格. '1、2008-11-25修改Function AddItem() by tommy 商品增加在最后 '2、2008-11-25修改by tommy 增加删除商品过程 Sub DelItem() '3、2008-11-25转换一些数据类型才能运算 '========================== Class UserCart '建立购物车 Sub CreateCart() Dim CFlag dim mCart(6,0) CFlag=CheckCart() if CFlag=false then For iCount =LBound(mCart,2) to UBound(mCart,2) mCart(0,iCount)="" next Session("UserCart")=mCart end if End Sub '检查购物车 Public Function CheckCart() IF IsArray(Session("UserCart")) THEN CheckCart = true ELSE CheckCart = false END IF End Function '检查购物车是否为空 Function CheckEmtpy() dim mCart mCart=Session("UserCart") For i =LBound(mCart,2) to UBound(mCart,2) if mCart(0,i)<>"" then CheckEmtpy=false Exit Function end if next CheckEmtpy=True End Function '添加商品 Function AddItem(aID,aName,aPrice1,aPrice2,aPrice3,aCount,aImage) '2008-12-25改进 by tommy 商品增加在最后 dim mCart AddItem=false if CheckItem(aID)=false then '无此商品 mCart=Session("UserCart") i =UBound(mCart,2) i=i+1 Redim preserve mCart(6,i) mCart(0,i)=aID mCart(1,i)=aName mCart(2,i)=aPrice1 mCart(3,i)=aPrice2 mCart(4,i)=aPrice3 mCart(5,i)=aCount mCart(6,i)=aImage session("UserCart")=mCart AddItem=True Else '有此商品,则商品数量+1 ModifItem aID,aCount,0 AddItem=True End if End Function '删除商品数量 Sub DelItem(mID) '改进2008-12-25by tommy 增加删除商品过程 dim mCart response.Write(mID) mCart = Session("UserCart") mount=UBound(mCart,2) If mID=mount Then mount=mount-1 mCart(0,mount+1)="" ReDim Preserve mCart(6,mount) Else mount=mount-1 For i=mID To mount For j=0 To 6 mCart(j,i)=mCart(j,i+1) Next Next mCart(0,mount+1)="" ReDim Preserve mCart(6,mount) End If session("UserCart")=mCart End Sub '修改商品数量 Sub ModifItem(mID,mCount,mFlag) 'mFlag－标志 0－添加 1－删除,2-修改 3-清空 'mID-商品ID 'mCount－修改商品的数量 dim mCart mCart = Session("UserCart") For i =LBound(mCart,2) to UBound(mCart,2) if mCart(0,i)=mID then select case mFlag case 1 mCart(0,i)=Int(mCart(5,i))-Int(mCount) case 0 mCart(5,i)= Int(mCart(5,i))+Int(mCount) case 2 if mCount=0 then mCart(5,i)=0 mCart(0,i)="" else mCart(5,i)=mCount end if case 3 mCart(5,i)=0 mCart(0,i)="" end select session("UserCart")=mCart exit Sub end if next End Sub '查看推车 Function ViewCart() dim mCart mCart=session("UserCart") ViewCart=mCart End Function '检查商品 Function CheckItem(cID) dim mCart mCart =Session("UserCart") For i =LBound(mCart,2) to UBound(mCart,2) if mCart(0,i)=cID then CheckItem=True exit Function end if next CheckItem=false End Function '清空购物车 Sub RemoveAll() dim mCart mCart = Session("UserCart") For i =LBound(mCart,2) to UBound(mCart,2) mCart(0,i)="" next Session("UserCart")=mCart End Sub '商品总价值 Function TPrice() dim mCart,i dim OutPrice(3) mCart=session("UserCart") for i=LBound(mCart,2) to UBound(mCart,2) if mCart(0,i)<>"" then Outprice(0) = Int(Outprice(0)) + Int(mCart(2,i))*Int(mCart(5,i)) Outprice(1) = Int(Outprice(1)) + Int(mCart(3,i))*Int(mCart(5,i)) Outprice(2) = Int(Outprice(2)) + Int(mCart(4,i))*Int(mCart(5,i)) Outprice(3) = Int(OutPrice(3)) + Int(mCart(5,i)) end if next TPrice=OutPrice End Function End Class %>