ListView ItemDataBound - determine if an item is an AlternatingItem?

I am using Listview to display my data. In the ItemDatabound event, I want to do some manipulation and change some of the displayed data. When I check the Item on this event, I use the following code, but I need to know if the item is a variable, since that will affect what I want to do with that line. Can anyone point me in the right direction?

if (e.Item.ItemType == ListViewItemType.DataItem)
{
   ListViewDataItem currentItem = (ListViewDataItem)e.Item;
   DataKey currentDataKey = myLilstView.DataKeys[currentItem.DataItemIndex];

   //Do something   
}