private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
        {
            bool showMenu=false;

            //要判断是否点击项，控件里至少要有一个项
            if (this.listView1.Items.Count > 0)
            {
                Point point = this.listView1.PointToClient(MousePosition);
                ListViewHitTestInfo hitTest = this.listView1.HitTest(point);

                if (point.Y >= this.listView1.TopItem.Bounds.Top &&
                    hitTest.Item != null)
                {//点击的不是列且不是空白区域
                    showMenu = true;
                }
            }

            e.Cancel = !showMenu;
        }

------解决方案--------------------
通过对listview包含的contextMenuStrip的opening事件处理
如果listview 没有选中任何行，取消菜单的显示

private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
       {
           if (listView1.SelectedItems.Count == 0)
           {
               e.Cancel = true;
           }
       }