bool issum = false;//是否需要汇总计算标志 public static Frmpdinventory GetSingleton() { if (frm == null || frm.IsDisposed) { frm = new Frmpdinventory(); } return(frm); }
private void tsmipdinventory_Click(object sender, EventArgs e) { Frmpdinventory frm = Frmpdinventory.GetSingleton(); frm.MdiParent = this; frm.Show(); frm.Activate(); }