public void Save(string sFilePath)

        {

            XlsDocument xls = new XlsDocument();

            xls.FileName = sFilePath;



            int colIndex = 0;

            int rowIndex = 1;



            Worksheet sheet = xls.Workbook.Worksheets.Add("Sheet1");

            Cells cells = sheet.Cells;



            // 表头

            for (int i = 0; i < _fields.Length; i++)

            {

                if (_dataSource.Columns.Contains(_fields[i]))

                {

                    colIndex++;

                    Cell cellHeader = cells.Add(rowIndex, colIndex, _titles[i]);

                    cellHeader.Font.Bold = true;

                    cellHeader.Font.ColorIndex = 4;

                    cellHeader.HorizontalAlignment = HorizontalAlignments.Left;

                    cellHeader.UseBorder = true;