public FileStreamResult ExcelExport(Parameters parameters_) { ex.mainmodel = mm; ex.parameters = parameters_; string filename = Path.Combine(Server.MapPath(@"~/App_Data"), @"report.xlsx"); parameters_.formatSelcted = param.DateFormatReturn; parameters_.entitySelected = param.EntityReturn; ex.QueryFromParameters(db, parameters_); if (System.IO.File.Exists(filename)) { System.IO.File.Delete(filename); } //System.IO.File.Create(filename); // pm.ExportToExcel(pm.FD_ACQ, filename); ex.ExcelExport(filename, mm); return(new FileStreamResult(new FileStream(filename, FileMode.Open), "application/vnd.openxmlformats-officedocument.spreadsheet.sheet")); }