Printing Problem in Crystal Report From JSP

Question

Hi,
I m calling crystal report from JSP.Report is parameterized.I m passing parameters from JSP.Report is displaying on the page,but when I try to print or export the report by pressing Print or export Button ,it displays an error message "Some parameters are missing values".
Please guide my,what should I do? Following is the code.
Good Bye
AQ
Vector fieldVector = new Vector();
SPParameters spParams = new SPParameters();
ReportFactory     reportFactory = new ReportFactory();
// Setteing the report Name (Path Appended)
reportFactory.setReportName(ReportsCoreDataConstants.REPORT_PATH.concat("Test_Rep2.rpt"));
//Setting the parameters for the report
ParameterField paramFeilds = null;
System.out.println("fiscalYearCode:"+fiscalYearCode);     
paramFeilds = spParams.createParams("IPFISCALCODE",fiscalYearCode);
paramFeilds.setReportName("");
fieldVector.add(paramFeilds);
//Creating the ReportSourceInstance
reportFactory.setFields(fieldVector);
String exp = "";
try {
     ReportFactory l_reportFactory=null;
     l_reportFactory = reportFactory;
     if (l_reportFactory != null) {
     CrystalReportViewer viewer = new CrystalReportViewer();
     viewer.setParameterFields(l_reportFactory.getFields());
     viewer.setOwnPage(true);
     viewer.setDisplayGroupTree(false);
     viewer.setHasZoomFactorList(false);
     viewer.setHasLogo(false);
     viewer.setHasPrintButton(true);
     viewer.setHasRefreshButton(true);
     viewer.setHasToggleGroupTreeButton(false);
     viewer.setHasViewList(false);
     viewer.setPrintMode(CrPrintMode.ACTIVEX);
     viewer.setSeparatePages(true);
     viewer.setEnableParameterPrompt(false);
     viewer.setReuseParameterValuesOnRefresh(true);
     viewer.setReportSource(l_reportFactory.createReport( request.getLocale() ));
     viewer.refresh();
     viewer.processHttpRequest(request, response, getServletConfig().getServletContext(),out);
     viewer.dispose();
} catch(Exception e) {
     exp = e.toString();
     System.out.println("Exception in JSP : " + e.toString());
     e.printStackTrace();
}

Answer 1

I think ScreenRaghu is right. If you look at the generated source, your jsp becomes an action and processHttpRequest() method is invoked everytime some action happens. So when you click the export button, request object no longer has the values your report needs. Either put the values in session or via link or db or whatelse.