winform 获取需要上传excel路径

获取上传Excel的路径：

            //打开目标文件，取出URL
            OpenFileDialog openfile = new OpenFileDialog();
            openfile.Filter = "Excel文件(*.xls)|*.xls|Excel文件(*.xlsx)|*.xlsx";
            if (openfile.ShowDialog() == DialogResult.OK)
            {
                txtURL.Text = openfile.FileName;
            }