public static jisuanqi CreateForm() { if (_danli == null) { _danli = new jisuanqi(); } return(_danli); }
private void toolStripButton9_Click(object sender, EventArgs e) { jisuanqi jisuanqi = jisuanqi.CreateForm(); //jisuanqi.MdiParent = this; //jisuanqi.Parent = panel3; jisuanqi.StartPosition = FormStartPosition.CenterScreen; //jisuanqi.WindowState = FormWindowState.Maximized; jisuanqi.Show(); }
private void jisuanqi_FormClosing(object sender, FormClosingEventArgs e) { _danli = null; }