public void test()

        {

            Thread.Sleep();

            string vvv = "";

            for (int i = ; i < ;i++ )

            {

                vvv = vvv  +i.ToString() + "\r\n";

                lblTip.Text = "已完成：[" + ((float)i* / (float)).ToString("0.00") + "%]...的数据";

                Application.DoEvents();

            }

            this.textBox1.Text = vvv;

        }