Simple Shopping Cart Using Session Variables Using AJAX
Feb 5, 2011
I know there are a million questions out there on how to implement a shopping cart in your site. However, I think my problem may be somewhat different. I currently have a working shopping cart that I wrote back in the 1.1 days that uses ASP.NET session variables to keep track of everything. This has been in place for about 6 years and has served its purpose well. However, it has come time to upgrade the site and part of what I have been tasked with is creating a more, erm, user-friendly site. Part of this is removing updatepanels and implementing real AJAX solutions.
My problem comes in where I need to persist this shopping cart over several pages. Sure I could use cookies, but I would like to keep track of carts for statistical purposes (abandonment stats, items added but not bought, those kinds of stats) as well as ser-friendliness, like persisting their cart so that if they come back it is remembered. This is easy enough if a user is logged in, but I don't want to force a user to create an account if they don't want. Additionally, the way we were processing orders was a bit, ehh, slapped-together. All of the details (color selected, type selected, etc) are passed to paypal via their description string which for the most part is ok, but if a product has selections that are too long for the string (255 chars i believe), they are cut off and we have to call the customer to confirm what they bought. If I were to implement a more "solid" shopping cart, we wouldn't have to do that because all the customer's choices would be stored, in addition to the order automatically being entered into the order processing system (they're manually entered into an excel spreadsheet. i know, right).
I want to do this the right way, but I don't want to use any sort of overblown software that won't really work with our current business model. Do I use a cookie to "label" each visitor to match them with their cart (give them a cookie with a GUID) across pages, keep their whole cart client side, keep the cart server side and just pull it from the db on each page refresh?
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<div id="one" style="display: block; ">
<asp:ListView ID="ListView1" runat="server" DataSourceID="SqlDataSource1"
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<br /> <asp:Label ID="stallidLabel" runat="server" Text='<%# Eval("stallid") %>' Visible="false"/>
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<asp:Button ID="addtocart" runat="server" Text='Add to cart' CommandName="addtocart" CommandArgument='<%# Eval("foodname")+ " " + Eval("price")%>' />
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