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();
}
