one way:
add a column
insert values in it in the event ItemDatabound
example column three is your computed value column:
private void _Grid_ItemDataBound(object sender,
System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType ==
ListItemType.AlternatingItem)
{
e.Item.Cells[3].Text = "your computed value";
}
}
cheers,
mortb