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Gettings values from databound Repeater Item controls and changing them clientside

Last Modified: 2009-12-16
I have implemented a shopping cart in ASP.Net that is entirely server side.  Items are displayed in repeater controls which are bound to datatables.  On postback I get the datatable from the repeater and keep it in the session object.  It currently posts back to the server whenever the user chooses to add or remove an item from their shopping cart, or if they edit the quantity of an item.  This is working great on a development machine, but can be a bit too slow when deployed on the internet.

My questions is...

If I click on a LinkButton in my Repeater Item to add an item to my basket, how do I modify a text box in the same repeater item so that it stores the quantity. E.g. if I hit "Add", the quantity should be set to 1, and an invisble check box is ticked to indicate that the item has been added.
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