How to detect empty array list / databean on JSP?
I am putting one arraylist and one javabean object with request.setAttribute.. I can access this in JSP. But how i can detect that Arraylist and/or Bean is empty ? regards Manisha - Do you Yahoo!? The all-new My Yahoo! Get yours free!
Re: How to detect empty array list / databean on JSP?
From: Manisha Sathe [EMAIL PROTECTED]
I am putting one arraylist and one javabean object with
request.setAttribute..
I can access this in JSP. But how i can detect that Arraylist and/or Bean
is empty ?
With JSTL, assuming you have done
request.setAttribute( myList, list );
%@ taglib uri=http://java.sun.com/jstl/core; prefix=c %
c:if test=${empty myList}
it's empty!
/c:if
I'm not sure what it means for a bean to be empty though. Maybe you would
check to see if a particular property is null?
--
Wendy Smoak
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Re: How to detect empty array list / databean on JSP?
If you are not using JSTL, you can do the same thing using logic:empty/ On Sun, 16 Jan 2005 16:04:51 -0800 (PST), Manisha Sathe [EMAIL PROTECTED] wrote: I am putting one arraylist and one javabean object with request.setAttribute.. I can access this in JSP. But how i can detect that Arraylist and/or Bean is empty ? regards Manisha - Do you Yahoo!? The all-new My Yahoo! Get yours free! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to detect empty array list / databean on JSP?
likey that any decsions' you shound do in Controller/Action. .V Manisha Sathe wrote: I am putting one arraylist and one javabean object with request.setAttribute.. I can access this in JSP. But how i can detect that Arraylist and/or Bean is empty ? regards Manisha - Do you Yahoo!? The all-new My Yahoo! Get yours free! -- RiA-SoA w/JDNC http://www.SandraSF.com forums - help develop a community My blog http://www.sandrasf.com/adminBlog - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to detect empty array list / databean on JSP?
Hi, I am new to struts.. I saw people using the logic for the validation checking. But how to use it..? For each attributes in the form are different..? rgds, - Original Message - From: Kishore Senji [EMAIL PROTECTED] To: Struts Users Mailing List user@struts.apache.org Sent: Monday, January 17, 2005 8:35 AM Subject: Re: How to detect empty array list / databean on JSP? If you are not using JSTL, you can do the same thing using logic:empty/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to detect empty array list / databean on JSP?
Thanks Wendy, For data bean empty - what i mean is - i select one particular record depending on ID given, and put in bean. if i do not find any record then can i check it at front end and display 'No record found' But i think u mean to say i can check for (MyBean.MyPropert == null ) ? right ? regards Manisha Wendy Smoak [EMAIL PROTECTED] wrote: From: Manisha Sathe I am putting one arraylist and one javabean object with request.setAttribute.. I can access this in JSP. But how i can detect that Arraylist and/or Bean is empty ? With JSTL, assuming you have done request.setAttribute( myList, list ); it's empty! I'm not sure what it means for a bean to be empty though. Maybe you would check to see if a particular property is null? -- Wendy Smoak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Do you Yahoo!? Yahoo! Mail - You care about security. So do we.
Re: How to detect empty array list / databean on JSP?
From: Manisha Sathe [EMAIL PROTECTED] For data bean empty - what i mean is - i select one particular record depending on ID given, and put in bean. if i do not find any record then can i check it at front end and display 'No record found' But i think u mean to say i can check for (MyBean.MyPropert == null ) ? right ? Yes, or, since you know in the Action that you haven't found the record, you could forward to a 'no data' page rather than the one that displays the data. -- Wendy Smoak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to detect empty array list / databean on JSP?
Or ... you could create an error for that circumstance and have that displayed on the same page ... not probably how I'd do it, but it's certainly a way. Personally, since you're probably displaying the data in a tabular format, I would prefer to display a row that spans all columns and simply displays a message such as Your Query Returned No Results. or something similar - something meaningful to the context (ie. No POs matched your criteria.). Good Luck, Eddie On Sun, 16 Jan 2005 20:59:00 -0700, Wendy Smoak [EMAIL PROTECTED] wrote: From: Manisha Sathe [EMAIL PROTECTED] For data bean empty - what i mean is - i select one particular record depending on ID given, and put in bean. if i do not find any record then can i check it at front end and display 'No record found' But i think u mean to say i can check for (MyBean.MyPropert == null ) ? right ? Yes, or, since you know in the Action that you haven't found the record, you could forward to a 'no data' page rather than the one that displays the data. -- Wendy Smoak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Eddie Bush - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to detect empty array list / databean on JSP?
Thanks to all for helping me out, Cheers Manisha - Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard.
Re: How to detect empty array list / databean on JSP?
Just to make sure people are clear about ${empty param.choice} is true
only if the choice parameter was not specified on a form, e.g. there
is no input field named choice or, with a set of check boxes, if the
user did not specify a checkbox in the group named choice). Also,
${empty sessionScope.choice} is true if there is no session-scoped
variable named choice or if the name is an empty string or some
other empty collection. The variable must exist and have a value to
be false in this case. This parameter might have been more accurately
called no_value rather than empty.
Jack
On Sun, 16 Jan 2005 21:03:41 -0800 (PST), Manisha Sathe
[EMAIL PROTECTED] wrote:
Thanks to all for helping me out,
Cheers
Manisha
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