Question

How can i populate 2 subReports using JasperReport (iReport 3.6) in a Java Servlet

Asked by: jacoalb

Hi

I'm trying to populate 2 subReports, each subReport has a table on it.
I cannot seem to populate the second subReport table using the same data source(REPORT_DATA_SOURCE)

eg. i used REPORT_DATA_SOURCE to populate both subReport tables, but only 1 report displays when both call this data source.

The data for the main report displays as well as the the data for 1 subReport but not the second.
the second report also does not even display the whole subReports table. eg. the column names that are static.

Can anyone help me? or does anyone know if 2 subReports(with a table on each) can be populated?

Thanx in advance.

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Asked On
2009-09-16 at 06:45:24ID24736251
Tags

Jasper Report

,

Java

,

iReport

Topics

Java Servlets

,

Java Programming Language

Participating Experts
2
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0
Comments
5

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Answers

 

by: pramodkrjsrPosted on 2009-09-17 at 00:20:40ID: 25353487

Have you tested your secondSubReport separately with the same datasource and paramters.
It may be possible that the db query in secondSubReport  returning zero rows

 

by: jacoalbPosted on 2009-09-17 at 00:43:11ID: 25353588

I've done that to and the second report populates with the data.
I first thought there might not be data but i know for a fact that there is.

The thing is i dont use a query on the report to return and populate the fields.
i do all of this within the java servlet and then send it across to the report for it to handle it with the datasource.

All of the examples i have looked out of how they populate 2 or more subreports they write the query within the jasper report. So i'm abit stuck atm trying to figure this out. I'm hoping this can be done the way im doing it.
I'm sure someone must have done it like this before?

 

by: ethnarchPosted on 2009-09-17 at 06:08:22ID: 25355627

What kind of dataset are you using?  

 

by: pramodkrjsrPosted on 2009-09-17 at 20:55:18ID: 25362851

is it possible to post your java code to invoking reports and also can you attach all your 3 JRXML.
This will be a great help to understand the problem.

 

by: jacoalbPosted on 2009-09-17 at 23:48:23ID: 25363327

i managed to sort out the problem.

In the servlet i mapped the DataSource for both subReports like this:

JRDataSource sectionADataSource = new JRBeanCollectionDataSource(aList);
JRDataSource sectionBDataSource = new JRBeanCollectionDataSource(bList);\
Map data = new HashMap
data.put("sectionADataSource ", sectionADataSource );
data.put("sectionBDataSource ", sectionBDataSource );
JasperPrint mainPrint = JasperFillManager.fillReport(mainReport, data, new JREmptyDataSource());

Then on the Jasper side i did the following:
On the Main Report:

<parameter name="sectionADataSource" class="net.sf.jasperreports.engine.JRDataSource" isForPrompting="false"/>
<parameter name="sectionBDataSource" class="net.sf.jasperreports.engine.JRDataSource" isForPrompting="false"/>

<subreport>
      <reportElement positionType="Float" x="0" y="8" width="555" height="100"/>
      <parametersMapExpression><![CDATA[$P{REPORT_PARAMETERS_MAP}]]></parametersMapExpression>
      <subreportParameter>
                              ..... here is setup all the field i will be using on the subReports(table columns)
      </subreportParameter>
      <dataSourceExpression><![CDATA[$P{sectionBDataSource}]]></dataSourceExpression>
      <subreportExpression class="java.lang.String"><![CDATA["..\\SectionA.jasper"]]></subreportExpression>
</subreport>

same goes for sectionB's subReport code

and now because i specified sectionADataSource to be subReport A's dataSource, by default the dataSource for subReport A will be REPORT_DATA_SOURCE, so now i have a seperate data source for  both subReports and can pull out the data easily without it not displaying the report or not.

I Also used this property on the subReport to always show the subReport even though there is not data:
<jasperReport .... whenNoDataType="AllSectionsNoDetail">
   .....
</jasperReport>

Thanx for all the comments

20120131-EE-VQP-002

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