HSSFWorkbook hssfWorkbook;//加载Excel文件using (var readFile = File.OpenRead(@"D:\demo.xls")){    //文件对象    hssfWorkbook = new HSSFWorkbook(readFile);}//获取工作表1ISheet iSheet = hssfWorkbook.GetSheetAt(0);ICell iCell = iSheet.GetRow(2).GetCell(0);//Copy A3 To G3iCell.CopyCellTo(6);IRow iRow = iSheet.GetRow(0);//Copy C1 To G1iRow.CopyCell(2, 6);//copy row 1 to row 9iSheet.CopyRow(0, 8);//写入文件FileStream file = new FileStream(@"demo.xls", FileMode.Create);hssfWorkbook.Write(file);file.Close();