Use FindControl to access the labels inside the listview
protected void ListView_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
var lbl = e.Item.FindControl("Label1") as Label;
}
}
If you dont want to use the findcontrol method check the below link
http://blogs.msdn.com/b/scothu/archive/2008/03/26/accessing-controls-in-listview-templates.aspx[
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Hope this helps