public static spform CreateForm()
{
if (_danli == null)
{
_danli = new spform();
}
return(_danli);
}
private void toolStripButton6_Click(object sender, EventArgs e)
{
if (!FilterClass.spgl())
{
MessageBox.Show("无权操作！");
return;
}
spform shangpinguanli = spform.CreateForm();
shangpinguanli.MdiParent = this;
shangpinguanli.Parent = panel3;
shangpinguanli.WindowState = FormWindowState.Maximized;
shangpinguanli.Show();
}
private void spform_FormClosing(object sender, FormClosingEventArgs e)
{
_danli = null;
}