My code is below.
1) In Form Constructor:
public MyForm(String id) {
super(id);
// add BeginDate/EndDate text fields: these require validation
add(new TextField("bdate", new PropertyModel(myBean, "bdate"))
.add(new ErrorDateValidator1())
.add(new ErrorDateValidator2()));
add(new TextField("edate", new PropertyModel(myBean, "edate"))
.add(new ErrorDateValidator1())
.add(new ErrorDateValidator2()));
// add Feedback Panel
FeedbackPanel feedbackPanel = new FeedbackPanel("feedback");
feedbackPanel.setOutputMarkupId(true);
add(feedbackPanel);
// add AJAX Download object - from example
final AJAXDownload download = new AJAXDownload() {
@Override
protected IResourceStream getResourceStream() {
File f = generateFile();
return new FileResourceStream(f);
}
@Override
protected String getFileName() {
return "report.xls";
}
};
add(download); // add to the form
// add Submit AjaxButton
add(new AjaxButton("submitButton") {
@Override
protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
// Refresh Feedback Panel
target.addComponent(form.get("feedback"));
// finally initiate the download
download.initiate(target);
}
});
}
2) Form onSubmit() is blank. It never even gets this far if there is a
Validator error, and it doesn't get to the Ajax getResourceStream() either
in this case. If there are no validation errors, the download works OK. But
if there are validation messages upon submission, they must be displayed in
the Feedback Panel.
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