private void tsbtnCheckOut_Click(object sender, EventArgs e)
{
if (this.MdiChildren.Length == 0)
{
ThGoodsInfo th = new ThGoodsInfo();
th.MdiParent = this;
th.Show();
}
}
private void 商品退货ToolStripMenuItem_Click(object sender, EventArgs e)
{
if (this.MdiChildren.Length == 0)
{
ThGoodsInfo sg = new ThGoodsInfo();
sg.MdiParent = this;
sg.Show();
}
}