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file = HttpContext.Current.Server.MapPath("~").ToString() + file;
            string excelfile = file + ".xlsx";
            using (SpreadsheetDocument excelDoc = SpreadsheetDocument.Create(excelfile, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
            {
                CreateExcelParts(excelDoc, table);

            }
            return excelfile;