if ( listView1.SelectedItems.Count > 0)
{
// 选中行的单元值
string s1 = listView1.SelectedItems[0].SubItems[0].Text.ToString();
string s2 = listView1.SelectedItems[0].SubItems[1].Text.ToString();
// 选中第几行
int a = listView1.SelectedIndices[0];
}