Struts action call in a JS method returns blank page 2007-02-08 - By Yee Kai Lai
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It returns a blank page might be due to
form.submit(); in your JS.
I think if you have a form named 'service.device.selected-devices-form' then
it will never be null hence it will always submit.
May you could enlightened why u need a form.submit() ?
>From: "Christopher Loschen" <CLoschen@(protected)>
>Reply-To: "Struts Users Mailing List" <user@(protected)>
>To: <user@(protected)>
>Subject: Struts action call in a JS method returns blank page
>Date: Wed, 7 Feb 2007 14:14:35 -0500
>
>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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