private void button1_Click_1(object sender, EventArgs e)

        {

            OpenFileDialog openFileDialog1 = new OpenFileDialog();

            openFileDialog1.Filter = "Excel文件(*.xls)|*.xls";

            if (openFileDialog1.ShowDialog() == DialogResult.OK)

            {

                textBox2.Text = openFileDialog1.FileName;

            }

        }