NPOI实现Excel导入

导入功能实现：

var file = HttpContext.Current.Request.Files[0];
GetExtensionsFromFileStream(file.InputStream);

using NPOI.XSSF.UserModel;
public List<MaterialExtend> GetExtensionsFromFileStream(Stream excelFielStream)
        {
            var list = new List<DBOMS_MaterialExtend>();
            var book = new XSSFWorkbook(excelFielStream);
            var firstSheet = book.GetSheetAt(0);
            var ExtendType = firstSheet.SheetName;
            for (int i = 1; i <= firstSheet.LastRowNum; i++)
            {
                var entity = new DBOMS_MaterialExtend();
                XSSFRow row = firstSheet.GetRow(i) as XSSFRow;
                entity.MaterialCode = (row.GetCell(0) as XSSFCell).StringCellValue;
                entity.ReferFactory = (row.GetCell(1) as XSSFCell).StringCellValue;
                entity.ExtendType = (int)Enum.Parse(typeof(ExtendTypeEnum), ExtendType, true);

                list.Add(entity);
            }

            return list;
        }