点击一个button按钮使窗体2显示在窗体1中

        private void button1_Click(object sender, EventArgs e)
        {
            this.tableLayoutPanel1.Controls.Clear();
            Form2 frm = new Form2();
            frm.TopLevel = false;
            this.tableLayoutPanel1.Controls.Add(frm);
            frm.Parent = this.tableLayoutPanel1;
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.Show();
        }