netcore导入 取Excel中的数据做操作

 public Response<bool> GetSheetValues(IFormFile file)
        {if (file == null || file.Length <= 0)
                return ResultBuilder.FailResult(false, "请检查文件是否存在");
            try
            {
                using (var stream = new MemoryStream())
                {
                    file.CopyToAsync(stream);//取到文件流

                    using (ExcelPackage package = new ExcelPackage(stream))
                    {

                        ExcelWorksheet worksheet = package.Workbook.Worksheets[0];
                        //获取表格的列数和行数
                        int rowCount = worksheet.Dimension.Rows;
                        int ColCount = worksheet.Dimension.Columns;