public FileResult GetExcel(string buildId, string energyCode, string type, string regionIDs, string date) { string[] regions = regionIDs.Split(','); string basePath = HttpContext.Server.MapPath("~/App_Data/"); RegionReportService service = new RegionReportService(); Excel excel = service.ExportReportToExcel(basePath, buildId, energyCode, regions, date, type); return(File(excel.Data, "application/ms-excel", excel.Name)); }