private void tsmiGoodsType1_Click(object sender, EventArgs e)
{
GoodsTpye1Info goods1 = GoodsTpye1Info.CreateForm();
goods1.MdiParent = this;
goods1.Show();
}
public static GoodsTpye1Info CreateForm()
{
if (_single == null)
{
_single = new GoodsTpye1Info();
}
else
{
_single.Activate();
}
return(_single);
}
private void this_FormClosed(object sender, FormClosedEventArgs e)
{
_single = null;
}
