private void 实验统计ToolStripMenuItem_Click(object sender, EventArgs e) { if (checkchildfrm("F_ExperimentStats") == false) { F_ExperimentStats F_ER = new F_ExperimentStats(); F_ER.MdiParent = this; F_ER.WindowState = FormWindowState.Maximized; F_ER.Text = "实验统计"; F_ER.Show(); } }