Struts action call in a JS method returns blank page 2007-02-07 - By Musachy Barroso
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When you post the form, after the action, struts will send a response,
usually a page. Because you don't want to change the current page, you
could do this by making an asynchronous request. I'm probably wrong, but
I don't think you can make a post, and stay on the same page (unless you
are returning the same page from the action of course).
regards
musachy
Christopher Loschen wrote:
> Hi all,
>
>
>
> I'm honestly unsure if I'm having a problem with Struts (sadly, 1.1) or
> with Javascript, or something else. But my best guess is it's a Struts
> issue, and anyway, there are a lot of very knowledgeable people on both
> of those technologies here, so I hope someone can help. Bottom line: I'm
> getting the popup with the correct values, but my main page under the
> popup becomes blank.
>
>
>
> I'm adding some functionality to an existing application. The
> functionality I'm adding takes the values from some checkboxes on page
> A, gets the corresponding devices from the checkbox values, and saves
> the resulting List into the request. Later down the stream, other code
> gets those values again and uses them as a list of devices on which to
> perform an action. Pretty straightforward.
>
>
>
> All of the actual navigation is happening via Javascript calls, starting
> with a link on page A, but outside the form where my checkboxes are
> declared. That link fires a Javascript function which pops up a small
> window with a list of actions which have been defined. If the user then
> clicks on one of those actions, another Javascript function fires which
> pops up another window to confirm that the user wants to perform the
> selected action on the selected devices.
>
>
>
> I have inserted my added functionality into that second script.
> Basically I need to submit the appropriate form on the page. I've
> defined it with the correct action and I've got a mapping in my
> struts-config.xml file:
>
>
>
> <form-bean
>
> name="service.device.selected-devices-form"
>
> type="com.xxx.webapp.common.CheckboxForm"/>
>
> ...
>
> <action path="/service/device/actions/store-selected-devices"
>
>
> type="com.xxx.webapp.service.list.StoreSelectedDevicesAction"
>
> name="service.device.selected-devices-form" />
>
>
>
> The mapping doesn't have any action forwards defined because it doesn't
> actually need to go anywhere (though that might be part of my problem).
> The JS function looks like this:
>
>
>
> function popActionConfirm(url) {
>
>
>
> var form = document.forms['service.device.selected-devices-form'];
>
> if (form!=null) form.submit();
>
>
>
> var winl = (screen.width - 500) / 2;
>
>
>
> var wint = (screen.height - 350) / 2;
>
>
>
> winprops =
> 'height=250,width=375,top='+wint+',left='+winl+',scrollbars=0,resizable=
> 0';
>
>
>
> var child = window.open(url,"action_confirm", winprops);
>
>
>
> self.name="main_window";
>
>
>
> }
>
>
>
> I added the first two lines of the JS method - it worked correctly
> before I put those in (though of course it didn't have my added
> functionality in place). The popup window does appear, and it has the
> correct values in it (that is, the devices which were selected). But the
> main window goes blank where before it remained unchanged. When I've
> seen blank pages like this before, it meant there was a bad action
> forward in the struts-config file, but I don't want the main page to
> change at all, so what I really want is for the main page to just stay
> in place as it was before the form was submitted.
>
>
>
> How do I go about doing that? Thanks!
>
>
>
> Chris Loschen
>
>
>
>
>
>
>
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