foreach (ListViewItem lvi in listView.Items)
{
if (lvi.SubItems[2].Text == saLvwItem[2])
{
// item already in list
// increase the ItemNumber
lvi.SubItems[1].Text = (Convert.ToInt32(lvi.SubItems[1].Text) + Convert.ToInt32(saLvwItem[1])).ToString();
bFound = true;
break;
}
}
http://stackoverflow.com/questions/10288654/how-to-traverse-the-list-view-column