private void 章节管理ToolStripMenuItem_Click_1(object sender, EventArgs e) { if (checkchildfrm("F_ChapterManage") == false) { F_ChapterManage F_ER = new F_ChapterManage(); F_ER.MdiParent = this; F_ER.WindowState = FormWindowState.Maximized; F_ER.Text = "章节管理"; F_ER.Show(); } }