private ActionResult GenerateCAReport(List <CAExcelReportItem> items, string wsName)
 {
     using (Excel xl = new Excel())
     {
         xl.AddDataWorksheet <CAExcelReportItem>(wsName, items);
         MemoryStream ms       = xl.getMemoryStream();
         string       filename = wsName.Replace(" ", "") + ".xls";
         return(File(ms, "application/msexcel", filename));
     }
 }