... box are used in a query that updates the server with the new category they now belong to. Similarly, when the btnUnSelect is clicked, items that are listed in the lstSelected list box are used ... chooses a category, the appropriate items are loaded into the two list boxes. Unselected items are in the list box on the left, and the selected items are in the list box on the right. If the ... items that are not currently assigned to categories are displayed in the list box on the left, which is titled Unselected Products. When the btnSelect button is clicked, any items that are highlighted...