private void newmanualform_Load(object sender, EventArgs e)
        {
            //toolstripstatuslabel是状态栏的子控件，也可以包含toolstripdropdownbutton及toolstripsplitbuttion
            //now.toshortdatestring转化为短日期字符串显示
            toolStripStatusLabel1.Text = DateTime.Now.ToShortDateString();
            //toolStripProgressBar是状态栏的子控件
            toolStripProgressBar1.Minimum = 0;
            toolStripProgressBar1.Maximum = 5000;
            toolStripProgressBar1.Step = 2;
            for (int i = 0; i < 5000; i++)
            {
                toolStripProgressBar1.PerformStep();
            }

        }