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Posted to user@struts.apache.org by Jim Coble <Ji...@duke.edu> on 2005/04/21 23:16:55 UTC
Possible to go to named anchor via ActionForward?
I have a JSP page in my application that consists of several lines of
explanatory text (a screen's worth or so) followed by a form. When the
user submits the form, the ActionForm validate method is called and, if
there are errors, the user is returned to the same JSP page where
html:errors displays the relevant error messages between the initial
explanatory text and the beginning of the form. All this works fine.
However, when the JSP page redisplays in this validation error scenario,
I'd like the browser page to jump to the error messages.
Here is what I tried that did not work.
Within the JSP page ...
<a name="errors"><html:errors/></a>
In struts-config action mapping, for the "input" attribute of the "action"
element ...
input="/flts/reservationlab.jsp#errors"
When I submit the form with a required field missing, I get ...
The requested resource (/flts/reservationlab.jsp#errors) is not available.
Is there any way I can set up an action mapping so that, if control is
redirected back to the "input" JSP page, I can make it so that the browser
jumps to a named anchor tag ("errors" in this particular case)?
Thanks.
--Jim
==================================
Jim Coble
Senior Technology Specialist
Center for Instructional Technology
Email: jim.coble@duke.edu
Voice: 919-660-5974 Fax: 919-660-5923
Box 90198, Duke University
Durham, NC 27708-0198
==================================
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Re: Possible to go to named anchor via ActionForward?
Posted by Joe Germuska <Jo...@Germuska.com>.
If you are returning a "redirecting" action forward, it shoul be no
problem to append an anchor -- but if your ActionForward results in a
RequestDispatcher forward (as in the default case), then the anchor
would probably cause the dispatcher to choke.
The problem is that errors are normally saved in request scope, and a
redirect would cause a new request scope to be created.
It is now possible to save errors to session scope, but I don't think
anyone has done anything so that you could rig up the framework to do
the validation for you and have that happen. But if you move the
validation into your action, I think you can get where you're trying
to go.
Another thing you might try would be to do it on the client side:
<logic:messagesPresent >
<a name="errors">You have errors</a> <br>
<html:messages id="msg"><div class="error"><c:out value="${msg}"
/></div></html:messages>
</logic:messagesPresent >
and then way down at the bottom of your page...
<logic:messagesPresent >
<script>
location.hash='errors';
</script>
</logic:messagesPresent >
(I've never actually used location.hash, but a quick check of the
JS/DHTML cookbook suggests that its the right syntax. Note that you
are explicitly intended to leave out the "#" mark in the value to
location.hash.)
Joe
At 5:16 PM -0400 4/21/05, Jim Coble wrote:
>I have a JSP page in my application that consists of several lines of
>explanatory text (a screen's worth or so) followed by a form. When the
>user submits the form, the ActionForm validate method is called and, if
>there are errors, the user is returned to the same JSP page where
>html:errors displays the relevant error messages between the initial
>explanatory text and the beginning of the form. All this works fine.
>However, when the JSP page redisplays in this validation error scenario,
>I'd like the browser page to jump to the error messages.
>
>Here is what I tried that did not work.
>Within the JSP page ...
><a name="errors"><html:errors/></a>
>In struts-config action mapping, for the "input" attribute of the "action"
>element ...
>input="/flts/reservationlab.jsp#errors"
>
>When I submit the form with a required field missing, I get ...
>The requested resource (/flts/reservationlab.jsp#errors) is not available.
>
>Is there any way I can set up an action mapping so that, if control is
>redirected back to the "input" JSP page, I can make it so that the browser
>jumps to a named anchor tag ("errors" in this particular case)?
>
>Thanks.
>--Jim
>
>==================================
>Jim Coble
>Senior Technology Specialist
>Center for Instructional Technology
>Email: jim.coble@duke.edu
>Voice: 919-660-5974 Fax: 919-660-5923
>Box 90198, Duke University
>Durham, NC 27708-0198
>==================================
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>For additional commands, e-mail: user-help@struts.apache.org
--
Joe Germuska
Joe@Germuska.com
http://blog.germuska.com
"Narrow minds are weapons made for mass destruction" -The Ex
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AW: Possible to go to named anchor via ActionForward?
Posted by Leon Rosenberg <st...@anotheria.net>.
Aehm,
<script>
document.location.href = document.location.href+'#errors';
</script>
At the bottom of your document?
I mean, you should remind yourself, that an anchor in your document has
nothing to do with the forward.
It's like renaming the class file if you need to call method B() of the
object instead of method A().
The jsp always contains the whole html source, an anchor is only a directive
for the browser, where to position it's viewport.
Another possibility is to send a redirect instead of adding a javascript
one-liner (haven't tested this one line, but it should work).
Regards
Leon
> -----Ursprüngliche Nachricht-----
> Von: Jim Coble [mailto:Jim.Coble@duke.edu]
> Gesendet: Donnerstag, 21. April 2005 23:17
> An: user@struts.apache.org
> Betreff: Possible to go to named anchor via ActionForward?
>
>
> I have a JSP page in my application that consists of several
> lines of explanatory text (a screen's worth or so) followed
> by a form. When the user submits the form, the ActionForm
> validate method is called and, if there are errors, the user
> is returned to the same JSP page where html:errors displays
> the relevant error messages between the initial explanatory
> text and the beginning of the form. All this works fine.
> However, when the JSP page redisplays in this validation
> error scenario, I'd like the browser page to jump to the
> error messages.
>
> Here is what I tried that did not work.
> Within the JSP page ...
> <a name="errors"><html:errors/></a>
> In struts-config action mapping, for the "input" attribute of
> the "action"
> element ...
> input="/flts/reservationlab.jsp#errors"
>
> When I submit the form with a required field missing, I get ...
> The requested resource (/flts/reservationlab.jsp#errors) is
> not available.
>
> Is there any way I can set up an action mapping so that, if
> control is redirected back to the "input" JSP page, I can
> make it so that the browser jumps to a named anchor tag
> ("errors" in this particular case)?
>
> Thanks.
> --Jim
>
> ==================================
> Jim Coble
> Senior Technology Specialist
> Center for Instructional Technology
> Email: jim.coble@duke.edu
> Voice: 919-660-5974 Fax: 919-660-5923
> Box 90198, Duke University
> Durham, NC 27708-0198
> ==================================
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
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Re: Possible to go to named anchor via ActionForward?
Posted by Je...@bcbstx.com.
Jim, I have used:
<a href="myActionName.do#tabSet">TabTitle</a>
in the jsp succesfully to position action output with anchors.
I have not tried it but possibly something like:
</forward>
<forward name="failure" path="/myfunctionDisplay.do#errors">
</forward>
Hope this helps.
-Jeff
Is there any way I can set up an action mapping so that, if control is
redirected back to the "input" JSP page, I can make it so that the browser
jumps to a named anchor tag ("errors" in this particular case)?
Thanks.
--Jim
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