It’s easy to do this validation server side, but I am assuming you want to do it client side? JQuery can do this very easily as long as you have something that all checkbox controls have in common to use as a selector such as class (CssClass on your .NET control). You can make a … Read more
Note that I prefer the code to be short. List<ListItem> selected = CBLGold.Items.Cast<ListItem>() .Where(li => li.Selected) .ToList(); or with a simple foreach: List<ListItem> selected = new List<ListItem>(); foreach (ListItem item in CBLGold.Items) if (item.Selected) selected.Add(item); If you just want the ListItem.Value: List<string> selectedValues = CBLGold.Items.Cast<ListItem>() .Where(li => li.Selected) .Select(li => li.Value) .ToList();