public async Task <IActionResult> ExportToExcel()
        {
            ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
            byte[] fileContents;
            var    header = await _stockService.ExportToExcel();

            var currentTenant = await _sessionAppService.GetCurrentLoginInformations();

            using (var excel = new ExcelPackage())
            {
                var ws = excel.Workbook.Worksheets.Add("Stocks");
                ws.Cells["A1"].Value = currentTenant.Tenant.Name;

                ws.Cells["A5"].Value = "Prod_Code";
                ws.Cells["B5"].Value = "Prod_Description";
                ws.Cells["C5"].Value = "Prod_Brand";
                ws.Cells["D5"].Value = "TotalPieces";
                ws.Cells["E5"].Value = "PricePerPiece";
                ws.Cells["F5"].Value = "Amount";
                int rowStart = 6;
                foreach (var item in header)
                {
                    ws.Cells[string.Format("A{0}", rowStart)].Value = item.ProductCode;
                    ws.Cells[string.Format("B{0}", rowStart)].Value = item.ProductItemName;
                    ws.Cells[string.Format("C{0}", rowStart)].Value = item.ProductBrand;
                    ws.Cells[string.Format("D{0}", rowStart)].Value = item.TotalPieces;
                    ws.Cells[string.Format("E{0}", rowStart)].Value = item.ProductPricePerPiece;
                    ws.Cells[string.Format("F{0}", rowStart)].Value = item.Amount;

                    rowStart++;
                }

                ws.Cells["A:AZ"].AutoFitColumns();

                fileContents = excel.GetAsByteArray();
            }
            if (fileContents == null || fileContents.Length == 0)
            {
                return(NotFound());
            }
            return(File(
                       fileContents: fileContents,
                       contentType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
                       fileDownloadName: "Stocks.xlsx"
                       ));
        }