关于C# listview控件中上下文菜问题

Question

在listview控件中怎么才能使我选中的项才弹出上下文菜单的，没有选中就不要弹出菜单的。

Answer 1

一共就一个菜单，根据选择项来区别属于谁，只需要显示在合适位置即可：
        private void mainList_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                ListView list = (ListView)sender;
                if (list.SelectedItems.Count > 0)
                {
                    menuList.Show(PointToScreen(e.Location));                }
            }
        }

Answer 2

private void lv1_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right && lv1.SelectedItems.Count == 1)
            {
                context1.Show(MousePosition);
            }
        }

Answer 3

listview lv=new listview();
ContextMenuStrip cms=new ContextMenuStrip ;
private void lv1_MouseClick(object sender, MouseEventArgs e)
{
  if (e.Button == MouseButtons.Right && lv1.SelectedItems.Count == 1)
  {
      lv.ContextMenuStrip=cms;
  }
}

Answer 4

错了，应该是
listview lv=new listview();
ContextMenuStrip cms=new ContextMenuStrip ;
private void lv1_MouseClick(object sender, MouseEventArgs e)
{
  if (e.Button == MouseButtons.Right && lv1.SelectedItems.Count >0)
  {
  lv.ContextMenuStrip=cms;
  }
}

Answer 5

不要给listview设定contextMenu属性，而是在MouseClick事件里面打开
private void listView1_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                if (listView1.SelectedItems.Count != 0)
                {
                    contextMenuStrip1.Show(MousePosition);
                }
            }
        }