HSSFWorkbook導入表格

補充：本文鏈接：https://blog.csdn.net/ethan_10/article/details/80335350
讀取excel

                IWorkbook workBook = null;
                using (Stream stream = files[0].OpenReadStream())
                {
                    if (fileName.EndsWith(".xlsx"))
                    {
                        //2007版本
                        workBook = new NPOI.XSSF.UserModel.XSSFWorkbook(stream);
                    }
                    else if (fileName.EndsWith(".xls"))
                    {
                        //2003版本
                        workBook = new NPOI.HSSF.UserModel.HSSFWorkbook(stream);
                    }
                }

                if (workBook == null)
                {
                    throw new UserFriendlyException(@"讀取Excel失敗,WorkBook爲空");
                }

獲取excel中的某一頁

                    ISheet sheet1 = workBook.GetSheetAt(0);//獲取第一頁

獲取第一行第一列的數據

                    string firstRow = sheet1.GetRow(0).GetCell(0).StringCellValue.Trim();