Subreport-using variables from main

[prasadvel]

How can we use the variables from main to sub report? or should we use the same sql again in sub report as i need to get the summary from mainreport 

[jabrown]

Hello,

You can pass parameters, fields, and variables from the master report to a parameter defined in the sub report.

1. Add a parameter in the sub report to accept the value from the master report.
2. Add the sub report component to your master report.  Point it to your sub report to be used.
3. You can map the variable from the master report to the sub report's parameter through the UI wizard in Jaspersoft Studio when you create a new sub report.  You could also modify your existing sub report component XML in the source view by adding the mapping with the below example.

<subreportParameter name="SubReportSampleParameter">

<subreportParameterExpression><![CDATA[$V{MasterReportVariable}]]></subreportParameterExpression>

</subreportParameter>