Detect empty jrprint ?

Posted on August 11, 2006 at 2:07pm
Hello,

I'd like to know how can I detect an empty report before loading it with the JRLoader.loadObject() method.

Because when I want to export a report (always the same) with several differents dates given in parameter, I've got white pages in the exported pdf (for each date which has no data in the database source).

Is it possible ? Thank for help.
JasperReports® Library
seboss's picture
seboss
31
Joined: Aug 8 2006 - 7:36pm
Last seen: 16 years 7 months ago

4 Answers:

Posted on August 11, 2006 at 3:36pm
You want to decide whether a report is empty before you load it? I don't think that's possible.

If you want to decide whether a report is empty, you first need to set whenNoDataType="NoPages" for the report design and then (when you have the filled report) check jasperPrint.getPages().isEmpty().

Regards,
Lucian
lucianc's picture
lucianc
72627
Joined: Jul 17 2006 - 1:10am
Last seen: 46 min 25 sec ago
Posted on August 31, 2006 at 7:18am
I explain again, I use this code :

Code:
<br />
ArrayList<Object> jpl = new ArrayList<Object>();<br />
String fileGen = JasperFillManager.fillReportToFile(reportPath,parameters, bdd.getConnection());<br />
jpl.add(JRLoader.loadObject(fileGen));</td></tr></tbody></table><br />
<br />
I just want to make something like this :<br />
<br />
<table align="center" border="0" cellpadding="3" cellspacing="1" width="90%"><tbody><tr><td><b>Code:</b></td></tr><tr><td><pre><br />
ArrayList<Object> jpl = new ArrayList<Object>();<br />
String fileGen = JasperFillManager.fillReportToFile(reportPath,parameters, bdd.getConnection());<br />
if (!report.isEmpty())	jpl.add(JRLoader.loadObject(fileGen));</td></tr></tbody></table><br />
<br />
But I don't understand how to do with jasperPrint.getPages().isEmpty().<br>Post edited by: seboss, at: 2006/08/31 07:18
seboss's picture
seboss
31
Joined: Aug 8 2006 - 7:36pm
Last seen: 16 years 7 months ago
Posted on August 31, 2006 at 8:21am
Code:
JasperPrint jasperPrint =<br />
(JasperPrint)JRLoader.loadObject(fileGen);<br />
if(!jasperPrint.getPages().isEmpty()) {<br />
 jpl.add(jasperPrint);<br />
} <br />
</td></tr></tbody></table>
Alexander Merz's picture
Alexander Merz
755
Joined: Jul 31 2006 - 11:16pm
Last seen: 16 years 8 months ago
Posted on August 31, 2006 at 9:17am
Ok, I didn't see that JRLoader.loadObject() return a jasperprint...

Thanks a lot
seboss's picture
seboss
31
Joined: Aug 8 2006 - 7:36pm
Last seen: 16 years 7 months ago
Feedback