8_隐藏界面_设定子界面的位置_子界面置顶

   public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button_back_Click(object sender, EventArgs e)
        {
            Form1 fr1 = new Form1();
            fr1.Show();
            this.Hide();
        }
    }

 //设定子界面的位置及置顶

        private void button_SelectList_Click(object sender, EventArgs e)
        {
            List ls = new List();
            w = this.Location.X;//获取主窗口坐标
            q = this.Location.Y;
            ls.Location = new Point(w, q);//将主窗口坐标赋给子窗口坐标
            ls.StartPosition = FormStartPosition.Manual;
            ls.ShowDialog();
　　　　　　  ls.BringToFront();

        }