Struts action call in a JS method returns blank page 2007-02-08 - By Musachy Barroso
Back
Check Prototype out, here is a good tutorial:
http://www.sergiopereira.com/articles/prototype.js.html, basically what
you need is something like:
|**var myAjax = new Ajax.Request(
url,
{
method: 'get',
parameters: Form.serialize("formid"),
onComplete: function() {
//do something here, or not :)
}
});**|
regards
musachy
Christopher Loschen wrote:
> I'm not all that familiar with JS, to be honest, and I've never had the
> chance to use Ajax (but want to learn). What I have now is working, but
> I'd be happy to learn how to do it without refreshing the page -- that
> does seem like a more elegant solution to me. What do you suggest? We do
> use JS for our app, but no JS framework as such as far as I can tell.
>
> Chris
>
> -- --Original Message-- --
> From: Musachy Barroso [mailto:musachy@(protected)]
> Sent: Thursday, February 08, 2007 8:03 AM
> To: Struts Users Mailing List
> Subject: Re: Struts action call in a JS method returns blank page
>
> Like I said before you can use Ajax to submit the form, and the page
> won't
> refresh, how to do it depends on what JS framework you are using, if
> any.
>
> regards
> musachy
>
> On 2/8/07, Christopher Loschen <CLoschen@(protected)> wrote:
>
>> Yes, you're right that the form submit was causing the system to
>>
> forward
>
>> to whatever the action said, which in my case was the blank page.
>>
> You'll see
>
>> from the later emails in the thread yesterday that I solved that by
>> forwarding to the action which populated the original page.
>>
>> I need the form.submit because I need to get the checked boxes from
>>
> the
>
>> form and I need to call the action specified in the action attribute
>>
> on that
>
>> form in order to put those checkbox values into the request in the
>>
> form that
>
>> my downstream code needs.
>>
>> Submitting the form is the only way I know to get the form values the
>>
> user
>
>> submits from the HTML page to my Java code -- are you saying that I
>>
> have
>
>> other alternatives?
>>
>> Chris
>>
>> __ ____ ____ ____ ____ ____ ____
>>
>> From: Yee Kai Lai [mailto:yeekai.lai@(protected)]
>> Sent: Thu 2/8/2007 12:24 AM
>> To: user@(protected)
>> Subject: RE: Struts action call in a JS method returns blank page
>>
>>
>>
>>
>> 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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