C# ListView如何在列头和内容绑定不同菜单

  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }

    bool mark = false;  //标记
    private void listView1_MouseDown(object sender, MouseEventArgs e)
    {
      //ListViewItem item = listView1.GetItemAt(e.X, e.Y);  //可以利用这个 当选中某一项时 菜单又不一样
      aaa.Visible = false;
      bbb.Visible = false;
      ccc.Visible = true;
      ddd.Visible = true;
      mark = true;
    }

    private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
    {
      if (!mark)
      {
        aaa.Visible = true;
        bbb.Visible = true;
        ccc.Visible = false;
        ddd.Visible = false;
      }
      mark = false;
    }
  }