1 IWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook(); 2 //添加一个sheet 3 ISheet sheet1 = book.CreateSheet("Sheet1"); 4 5 6 //给sheet1添加第一行的头部标题 7 NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow(0); 8 row1.CreateCell(0).SetCellValue("编号"); 9 row1.CreateCell(1).SetCellValue("姓名"); 10 11 MemoryStream ms = new MemoryStream(); 12 book.Write(ms); 13 ms.Seek(0, SeekOrigin.Begin); 14 return File(ms, "application/vnd.ms-execel", "1.xls");