private void barButtonItem2_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { ExamManage.ExamMain exForm = ExamManage.ExamMain.GetStuForm(); exForm.MdiParent = this; exForm.Show(); exForm.Activate(); }
public static ExamMain GetStuForm() { if (form == null || form.IsDisposed) { form = new ExamMain(); } return(form); }