Found a different solution, in case somebody is interested:
fileUploadField.add(new AjaxEventBehavior("onchange")
{
protected void onEvent(AjaxRequestTarget target) {
Request request = RequestCycle.get().getRequest();
String filename = request.getParameter("filename");
System.out.println("filename is [" + filename + "]");
}
public CharSequence getCallbackUrl(boolean
onlyTargetActivePage) {
CharSequence callBackUrl =
super.getCallbackUrl(onlyTargetActivePage);
return callBackUrl + "&filename=' + this.value + '";
}
});
not as beautiful as I'd like to have it, because I'm manually messing around
with the callback url, but it works :-).
:-),
Thomas
-------- Original-Nachricht --------
> Datum: Wed, 27 Aug 2008 22:51:51 +0200
> Von: "Mattom" <[EMAIL PROTECTED]>
> An: [email protected]
> Betreff: Re: fileupload element checking filename existing before upload
> using ajax
> That's what I've found, too, that uploading using ajax is not possible.
>
> But :-), I don't need the upload to be ajax, all I need is the filename,
> as soon as the file was choosen by the user.
> That way I could validate the filename serverside, and provide immediate
> feedback, before the (maybe) long upload is performed.
> So, just adding a parameter to the ajax "onchange" call would do the
> trick.
>
> What I'll try now is adding another "hidden" ajax form, link the file
> upload element to a hidden field in this form, and then "manually" submit this
> form, by adding my own "wicket free" javascript... not beautiful, but
> should work.
>
> Thanks for your help,
> Thomas
>
> -------- Original-Nachricht --------
> > Datum: Wed, 27 Aug 2008 08:57:01 -0700 (PDT)
> > Von: Michael Sparer <[EMAIL PROTECTED]>
> > An: [email protected]
> > Betreff: Re: fileupload element checking filename existing before upload
> using ajax
>
> >
> > the problem is file uploading with ajax - that's just not possible
> > (restriction of the http protocol as far as I remember), however you can
> > 'simulate' using some approaches, e.g. a hidden iframe where you post
> your
> > file to.
> > that topic has been discussed many times, just search the list - if i
> > remember correctly there's already a component for that somewhere in
> > wicketstuff ...
> >
> > regards,
> > Michael
> >
> > Thomas Lutz wrote:
> > >
> > > Hi list !
> > >
> > > I'm trying to build a upload form consisting of one ore more
> > fileuploads.
> > >
> > > If the file(s) already exist(s) on the server, I'd like to throw a
> > > validation message, but, before uploading takes place.
> > >
> > > I tried to attach AjaxEventBehavior to the FileUploadField, onchange
> is
> > > executed, but I've no access to the current value of the file input
> > > element. Tried AjaxFormComponentUpdatingBehavior as well, no success.
> > >
> > > How should I approach this ? Basically all I need is ajaxing the
> > onchange
> > > with the "new value" back to the server.
> > >
> > > Thanks for your help,
> > > Thomas
> > > --
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> > >
> > >
> >
> >
> > -----
> > Michael Sparer
> > http://talk-on-tech.blogspot.com
> > --
> > View this message in context:
> >
> http://www.nabble.com/fileupload-element-checking-filename-existing-before-upload-using-ajax-tp19181551p19184026.html
> > Sent from the Wicket - User mailing list archive at Nabble.com.
> >
> >
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