Hide columns in subreports

[Ajenjo]

Hi.

I have a subreport with 3 columns. Depending on the user's action is hidden some of the columns.

My question is, how I can be able to hide or show columns in runtime for these reports?

I do it with this code:

 

            File sourceFile = new File(rootJasperFiles + "RequestProposal_Products.jasper");
            JasperReport sourceJasperReport = (JasperReport)JRLoader.loadObject(sourceFile);
           
            JRStaticText unitsLabelBox = (JRStaticText)sourceJasperReport.getColumnHeader().getElementByKey("unitslabel.box");
            unitsLabelBox.setWidth(0);
           
            JRTextField unitsLabelTextField = (JRTextField)sourceJasperReport.getColumnHeader().getElementByKey("unitslabel.textfield");
            unitsLabelTextField.setWidth(0);
           
            JRBand[] jrbands = (JRBand[])sourceJasperReport.getDetailSection().getBands();
           
            JRFrame unitsFrame = (JRFrame)jrbands[0].getElementByKey("units.frame");
            unitsFrame.setWidth(0);
           
            JRTextField unitsTextField = (JRTextField)jrbands[0].getElementByKey("units.textfield");
            unitsTextField.setWidth(0);
           
           
            jasperPrint = JasperFillManager.fillReport(rootJasperFiles + "RequestProposal.jasper", pars, dataSource);

 

But no works, I think that the subreport has the changes but I fill the "parent" report with no changes ¿?¿?¿?

Can you help me, thanks.