Re: combining tags
Tom - Please see reply below:
On 7/6/05, Tom Holmes Jr. [EMAIL PROTECTED] wrote:
I used to have some JSP code that looked like:
logic:iterate name=myForm property=myDataList id=iter
html:checkbox name=iter property=checkedRes indexed=true/
bean:write name=iter property=roomType/
html:text name=iter property=numItems indexed=true
style=width:40/
/logic:iterate
I'd like to switch to something likes this:
c:forEach items=${SelectedRoomsForm.roomsList} var=data
varStatus=status
html:checkbox name=data property=checkedRes indexed=true/
c:out value=${data.roomType}/
html:text name=data property=numItems indexed=true
style=width:40/
/c:forEach
The c:out tag I am sure works, but I am not sure about the
html:checkbox or the html:text
Does this code look ok, or is there something I have to change?
Though you can mix and match JSTL and the Struts taglibs, you should
be aware of the inter-dependencies between specific tags. For example,
the indexed property of the struts-html tags relies on a parent
logic:iterate to produce the resulting name attribute. I recommend
reading this FAQ page [
http://struts.apache.org/faqs/indexedprops.html ] and the TLD docs in
general.
If you stare at the markup generated by the first snippet, that will
tell you what the JSTL snippet should look like.
-Rahul
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Re: combining tags
From: Tom Holmes Jr. [EMAIL PROTECTED]
I'd like to switch to something likes this:
c:forEach items=${SelectedRoomsForm.roomsList} var=data
varStatus=status
html:checkbox name=data property=checkedRes indexed=true/
c:out value=${data.roomType}/
html:text name=data property=numItems indexed=true
style=width:40/
/c:forEach
The c:out tag I am sure works, but I am not sure about the
html:checkbox or the html:text
Does this code look ok, or is there something I have to change?
Assuming you're not on a JSP 2.0 container (I assume not, or you wouldn't be
using c:out) you might want to switch to the Struts-EL tags instead of the
'classic' taglib. With the ability to use expressions in the JSTL tags,
you'll quickly get frustrated at NOT being able to do it in the Struts tags.
Indexed tags are now supported within c:forEach loops, according to the
README.txt file included with Struts-EL. To switch over, look in the
'contrib' directory of the Struts 1.2.7 distribution, get the .jar files and
change to:
%@ taglib uri=http://struts.apache.org/tags-html-el; prefix=html-el
%
(Some people leave the prefix as 'html'.)
All my checkboxes-within-forEach-loops are 'multibox' not 'checkbox'. But I
don't use indexed properties, so YMMV.
--
Wendy Smoak
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Re: combining tags
Wendy Smoak wrote:
From: Tom Holmes Jr. [EMAIL PROTECTED]
I'd like to switch to something likes this:
c:forEach items=${SelectedRoomsForm.roomsList} var=data
varStatus=status
html:checkbox name=data property=checkedRes indexed=true/
c:out value=${data.roomType}/
html:text name=data property=numItems indexed=true
style=width:40/
/c:forEach
The c:out tag I am sure works, but I am not sure about the
html:checkbox or the html:text
Does this code look ok, or is there something I have to change?
Assuming you're not on a JSP 2.0 container (I assume not, or you wouldn't be
using c:out) you might want to switch to the Struts-EL tags instead of the
'classic' taglib. With the ability to use expressions in the JSTL tags,
you'll quickly get frustrated at NOT being able to do it in the Struts tags.
Indexed tags are now supported within c:forEach loops, according to the
README.txt file included with Struts-EL. To switch over, look in the
'contrib' directory of the Struts 1.2.7 distribution, get the .jar files and
change to:
%@ taglib uri=http://struts.apache.org/tags-html-el; prefix=html-el
%
(Some people leave the prefix as 'html'.)
All my checkboxes-within-forEach-loops are 'multibox' not 'checkbox'. But I
don't use indexed properties, so YMMV.
I have no idea if it is a JSP Container 2.0 or not. I can tell you that
we are using IBM Websphere 5.1.x Portal Server. I can also tell you
that the the imports we are using in our JSP pages look like:
%@ taglib uri=/WEB-INF/tld/struts-html.tld prefix=html %
%@ taglib uri=/WEB-INF/tld/struts-bean.tld prefix=bean %
%@ taglib uri=/WEB-INF/tld/struts-logic.tld prefix=logic %
%@ taglib uri=/WEB-INF/tld/c.tld prefix=c %
And we are using Struts. My boss has told me at one point that he'd
wanted to start using JSTL tags more then the older JSP Tag Libraries.
To me, that means using more of the c:? tags, but we still need to use
html:? tags. To my boss, that would mean getting more functionality and
using expressions as you stated. For example, rather than writing:
bean:write name=iter property=selectedStartDate1/ -
bean:write name=iter property=selectedEndDate1/br
Instead we could do:
c:out value=${data.selectedStartDate1} - ${data.selectedEndDate1} /
Doesn't that seem easier to understand? I just figured we'd get the
same results when we submit the form. When using logic:iterate I
understand how we can do c:out just fine. And it works fine with
html:text, but it's when we do c:if test= something that I was
getting into trouble. It didn't seem to work?
As Rahul stated, I'll check the generated HTML source and I'll also
check the Action class to see if the data submitted is the same.
Thanks for the help.
Tom
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Re: combining tags
From: Tom Holmes Jr. [EMAIL PROTECTED]
I have no idea if it is a JSP Container 2.0 or not. I can tell you that
we are using IBM Websphere 5.1.x Portal Server.
A quick Google search didn't turn up the info-- I'm trying to determine
which version of the Servlet specification it implements. My comment was
merely that if it's Servlet 2.4/JSP 2.0, you probably would have written
${data.roomType}
instead of c:out value=${data.roomType}/. Not that you wouldn't use
*any* c:xxx tags.
So, let's assume Servlet 2.3/JSP 1.2 for now.
And we are using Struts. My boss has told me at one point that he'd
wanted to start using JSTL tags more then the older JSP Tag Libraries.
To me, that means using more of the c:? tags, but we still need to use
html:? tags.
My point was that if you're going to add JSTL to a Struts project, you might
also want to move to Struts-EL in order to gain the ability to use
expressions within the Struts tags, as well as the JSTL-awareness so that
indexed properties will work within an enclosing c:forEach loop.
http://struts.apache.org/faqs/struts-el.html
--
Wendy Smoak
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RE: combining tags
To clarify some comments from other responders:
It is a good idea to use Struts-EL if you're going to use the JSTL.
However, for this particular example, the Struts tag library itself has
knowledge of c:forEach, as opposed to logic:iterate, so an html
Struts tag that uses indexed=true will work inside a c:forEach, at
least with respect to generating the correct indexed property values.
-Original Message-
From: Tom Holmes Jr. [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 06, 2005 8:02 AM
To: Tag Libraries Users List
Subject: combining tags
I used to have some JSP code that looked like:
logic:iterate name=myForm property=myDataList id=iter
html:checkbox name=iter property=checkedRes
indexed=true/
bean:write name=iter property=roomType/
html:text name=iter property=numItems indexed=true
style=width:40/
/logic:iterate
I'd like to switch to something likes this:
c:forEach items=${SelectedRoomsForm.roomsList} var=data
varStatus=status
html:checkbox name=data property=checkedRes
indexed=true/
c:out value=${data.roomType}/
html:text name=data property=numItems indexed=true
style=width:40/
/c:forEach
The c:out tag I am sure works, but I am not sure about the
html:checkbox or the html:text
Does this code look ok, or is there something I have to change?
Thanks.
Tom
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