public ActionResult ExportarLista()
{
ReportDocument rd = new ReportDocument();
var rs = db.getAsistencia(1).ToList();
rd.Load(Path.Combine(Server.MapPath("~/CrystalReports"), "CrystalReportLista.rpt"));
rd.SetDataSource(rs);
rd.SetParameterValue("idSesion", 1);
Response.Buffer = false;
Response.ClearContent();
Response.ClearHeaders();
Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
stream.Seek(0, SeekOrigin.Begin);
return(File(stream, "application/pdf", "ListaSesion.pdf"));
}