private void toolStripButton6_Click(object sender, EventArgs e) { //设置 frmSetting setting = frmSetting.CreateForm(); setting.MdiParent = this; setting.Show(); }
public static frmSetting CreateForm() { //判断是否存在该窗体,或时候该字窗体是否被释放过,如果不存在该窗体,则 new 一个字窗体 if (_instance == null || _instance.IsDisposed) { _instance = new frmSetting(); } return(_instance); }