c# winfrom 子窗体分屏显示

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参考博客：https://blog.csdn.net/kailan818/article/details/8517126

实现代码：

private void button1_Click(object sender, EventArgs e)

        {

            var frmChild = Application.OpenForms["frmChild"];

            if (frmChild != null)

            {

                frmChild.Activate();

            }

            else

            {

                frmChild frm = new frmChild();

                frm.Owner = this;//申明当前窗体是子窗体

                ShowOnMonitor(frm);

                frm.Show();

            }

        }

        private void ShowOnMonitor(frmChild frm)

        {

            Screen[] sc = Screen.AllScreens;

            if (sc.Length > )

            {

                //获取当前屏幕

                Screen CurrentScreen = Screen.FromControl(this);

                //获取当前鼠标所在的屏幕

                //Screen CurrentScreen = Screen.FromPoint(new Point(Cursor.Position.X, Cursor.Position.Y));

                var child = sc.Where(it => it.DeviceName != CurrentScreen.DeviceName).FirstOrDefault();

                frm.StartPosition = FormStartPosition.Manual;

                frm.Location = new Point(child.Bounds.Left, child.Bounds.Top);

            }

            // If you intend the form to be maximized, change it to normal then maximized.

            frm.WindowState = FormWindowState.Normal;

            frm.WindowState = FormWindowState.Maximized;

        }