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//查询子窗体是否存在
public bool checkchildfrm(string childfrmname)
{
foreach (Form childFrm in this.MdiChildren)
{
if (childFrm.Name == childfrmname)
{
if (childFrm.WindowState == FormWindowState.Minimized)
childFrm.WindowState = FormWindowState.Normal;
childFrm.Activate();
return true;
}
}
return false;
}
case "1":
{
if (this.checkchildfrm("Frm_patient") == true)
return;
Frm_patient frm = new Frm_patient();
frm.MdiParent = this;
frm.Show();
break;
}