FlexCel 插入公式和插入新行

   //http://www.tmssoftware.biz/flexcel/doc/vcl/api/FlexCel.Core/TExcelFile/InsertAndCopyRange.html#texcelfileinsertandcopyrangetxlscellrange-integer-integer-integer-tflxinsertmode
                //http://www.tmssoftware.biz/flexcel/doc/vcl/api/FlexCel.Core/TFlxInsertMode.html
                xls.InsertAndCopyRange(new TXlsCellRange(10, 1, 10, 9), 11, 1, 1, TFlxInsertMode.ShiftRowDown);
                //插入公式
                xls.SetCellValue(10, 3, new TFormula("=Sum(D9:D20)"));