private void showTable_certainData_Click(object sender, RoutedEventArgs e)
        {
            timer.Stop();
            if (datalist == null)
            {
                MessageBox.Show("没有数据");
                return;
            }

            DataTable tbl = new DataTable();

            tbl.Columns.Add("time");
            tbl.Columns.Add("light Intesity");

            for (int m = 0; m < datalist.Count; m++)
            {
                tbl.Rows.Add((m * collectDataTime).ToString() + "s", ((DataUnit)datalist[m]).da[(int)waveIndex]);
            }

            ShowTable showTbl = new ShowTable(tbl);

            showTbl.Show();
        }
        private void showTable_allData_Click(object sender, RoutedEventArgs e)
        {
            timer.Stop();
            if (datalist == null)
            {
                MessageBox.Show("没有数据");
                return;
            }

            //         int wl;
            DataTable dtbl = new DataTable();

            dtbl.Columns.Add("time");
            for (int i = 0; i < 2068; i++)
            {
                dtbl.Columns.Add(i.ToString(), typeof(double));
                //将i换为String.Format( "{0:F} ",wavelengthArray[i])却不行。。。
            }

            for (int j = 0; j < datalist.Count; j++)
            {
                DataRow  cRow    = dtbl.NewRow();
                object[] rowData = new object[2069];
                rowData[0] = j;
                for (int m = 0; m < 2068; m++)
                {
                    rowData[m + 1] = ((DataUnit)datalist[j]).da[m];
                }
                cRow.ItemArray = rowData;
                dtbl.Rows.Add(cRow);
            }

            ShowTable showTbl = new ShowTable(dtbl);

            showTbl.Show();
        }