WinForm窗体之间传值。

最近看了一个关于ListView的例子，在ListView选中项时，自动弹出一个新窗体显示选中项的数据，窗体和窗体之间怎么传值。有以下两种方法，

1》是声明一个Public类，当选中项时，将值放到类中去，再实例一个窗体时，将类传到新窗体。再从类中取出值，赋给TextBox显示，在新窗体要修改的值的时候，就不能了。

 ListViewItem lt= this.listView1.SelectedItems[0];
            s = new PerSon();
            s.Id = lt.Text;
            s.Name = lt.SubItems[1].Text;
            s.Address = lt.SubItems[2].Text;
            Form3 fr3 = new Form3(s);
            fr3.Show();

 public partial class Form3 : Form
    {
        PerSon s;
        public Form3(PerSon s)
        {
            this.s = s;
            InitializeComponent();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            this.textBox1.Text = s.Id;
            this.textBox2.Text = s.Name;
            this.textBox3.Text = s.Address;
        }
    }

2》直接将this.ListView1，传到新窗体,直接操作ListView1。

ListViewItem lt= this.listView1.SelectedItems[0];
            //s = new PerSon();
            //s.Id = lt.Text;
            //s.Name = lt.SubItems[1].Text;
            //s.Address = lt.SubItems[2].Text;
            Form3 fr3 = new Form3(this.listView1);
            fr3.Show();

  //PerSon s;
        ListView ls;
        //ListViewItem lst;
        public Form3(ListView ls)
        {
            this.ls = ls;
            InitializeComponent();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            ListViewItem lst = this.ls.SelectedItems[0];
            this.textBox1.Text = lst.Text;
            this.textBox2.Text = lst.SubItems[1].Text;
            this.textBox3.Text = lst.SubItems[2].Text ;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ListViewItem lst = this.ls.SelectedItems[0];
            lst.Text = this.textBox1.Text;
            lst.SubItems[1].Text = this.textBox2.Text;
            lst.SubItems[2].Text = this.textBox3.Text;
        }