public static Depreciation GetInstance()
{
if (dlform == null || dlform.IsDisposed)
{
dlform = new Depreciation();
}
return(dlform);
}
private void barButtonItem折旧费用_ItemClick(object sender, ItemClickEventArgs e)
{
bool isopen = true;
foreach (Form f in this.MdiChildren)
{
if (f.Name == "Depreciation")
{
f.Visible = true;
f.Activate();
f.WindowState = FormWindowState.Maximized;
isopen = false;
break;
}
}
if (isopen)
{
Depreciation Frm = Depreciation.GetInstance();
Frm.MdiParent = this;
Frm.WindowState = FormWindowState.Maximized;
Frm.Show();
}
}