How to create one master report with multiple independent subreports?

[ich_freue_mich]

Hello, so far we created several stand-alone one page reports. All independent from each other. Now we want to assemble them together in one master report. Being still quite new to Jasper I already figured out:

1. I can assemble 2 reports by putting one as a subreport in the title and another in the summary section - but we got many more, so no soulation.
2.  If we put a sequence of sub-reports into the title section, they either overwrite each other (as x=0 and y=0) or you get an error because the end of page is reached after the first subreport => no solution
3. If (in 2.) we put a in-between 2 sub-reports, they still overwrite and we can another empty page => no solution
4. We also cannot use the "detail" section: Because the datasource of the master report is empty, it will never display anything
5. If can't use the "noData" section because it has the same problems as in 2.

Is there any help on what to do out there? Possibly usng groups? But how?

Here is our Master report that behaves as described in 2.):

<?xml version="1.0" encoding="UTF-8"?><!-- Created with Jaspersoft Studio version 6.0.1.final using JasperReports Library version 6.0.0  --><!-- 2015-02-04T19:21:41 --><jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Blank_A4_Landscape" pageWidth="842" pageHeight="595" orientation="Landscape" whenNoDataType="NoDataSection" columnWidth="842" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="a37e5125-a809-4647-b6bf-703c70e34714">    <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="TDBSYNCPROD.xml"/>    <background>        <band splitType="Stretch"/>    </background>    <noData>        <band height="595" splitType="Stretch">            <subreport runToBottom="true">                <reportElement key="1" mode="Opaque" x="0" y="0" width="803" height="554" isPrintInFirstWholeBand="true" backcolor="rgba(255, 255, 255, 0.0)" uuid="28128e81-8e7a-4fbb-b93f-3a7e83c8ab47"/>                <connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>                <subreportExpression><![CDATA["SalesBookingsHistory.jasper"]]></subreportExpression>            </subreport>            <subreport runToBottom="true">                <reportElement key="2" positionType="Float" mode="Opaque" x="0" y="0" width="803" height="554" isPrintInFirstWholeBand="true" backcolor="rgba(255, 255, 255, 0.0)" uuid="28128e81-8e7a-4fbb-b93f-3a7e83c8ab47"/>                <connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>                <subreportExpression><![CDATA["DGR_Report_absolut.jasper"]]></subreportExpression>            </subreport>        </band>    </noData></jasperReport>[/code]

 

<?xml version="1.0" encoding="UTF-8"?> Pls keep in mind that we have more 1-page sub-reports to join then there are sections available... I am grateful for any hints!

[peter.w]

Hi

I am assuming you don't need parameters, so in your main report set a connection to the database as normal and pass this to each subreport as the connection.

Use this query "SELECT 1 AS dummy" for your master report.

Then create a detail band for each subreport.

I don't know if it is relevant but in the one I made I fetch a value from each subreport to the main but i dont think this is needed.

 

 

[ich_freue_mich]

Many thanks, Peter,

you were right, I presently don't have to pass parameters nor I have to return values from the subreports.

So the solution below works works for me (for my Oracle DB) :

<?xml version="1.0" encoding="UTF-8"?><!-- Created with Jaspersoft Studio version 6.0.1.final using JasperReports Library version 6.0.0  --><!-- 2015-02-05T14:42:34 --><jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="01_MasterDailyReport" pageWidth="842" pageHeight="595" orientation="Landscape" whenNoDataType="NoDataSection" columnWidth="842" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="a37e5125-a809-4647-b6bf-703c70e34714">    <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="TDBSYNCPROD.xml"/>    <queryString language="SQL">        <![CDATA[sELECT 1 AS DUMMY from DUAL]]>    </queryString>    <background>        <band splitType="Stretch"/>    </background>    <detail>        <band height="595" splitType="Stretch">            <subreport runToBottom="true">                <reportElement key="1" mode="Opaque" x="0" y="0" width="803" height="554" isPrintInFirstWholeBand="true" backcolor="rgba(255, 255, 255, 0.0)" uuid="28128e81-8e7a-4fbb-b93f-3a7e83c8ab47"/>                <connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>                <subreportExpression><![CDATA["SalesBookingsHistory.jasper"]]></subreportExpression>            </subreport>        </band>        <band height="595" splitType="Stretch">            <subreport runToBottom="true">                <reportElement key="2" positionType="Float" mode="Opaque" x="0" y="0" width="803" height="554" isPrintInFirstWholeBand="true" backcolor="rgba(255, 255, 255, 0.0)" uuid="28128e81-8e7a-4fbb-b93f-3a7e83c8ab47"/>                <connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>                <subreportExpression><![CDATA["DGR_Report_absolut.jasper"]]></subreportExpression>            </subreport>        </band>    </detail></jasperReport>[/code]