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From Mark Lowe <mark.l...@talk21.com>
Subject Re: Form Submission
Date Wed, 18 Feb 2004 16:16:02 GMT
Was a bit like squaring a circle. I think the poor boy got to  
strong-house before me :o)

On 18 Feb 2004, at 16:52, Geeta Ramani wrote:

> Mark:
>
> Not sure what you meant by your remark about javascript, but I believe
> javascript was ruled out earky on (not an option or something).
> The reason I
> thought saving the user as a session was ok is that I do not believe  
> they are
> evil (:) either, and further, I can just see this sort of problem  
> recurring
> throughout his application.  Since the user is something that will not
> change, i felt it's ok to save this as a session variable. (and this I
> sometimes use as a way to judge whether or not I should save something  
> as a
> session variable, thus removing the headaches of remembering to  
> reset/remove
> them)..
>
> That said, I have to reiterate that I did not read/understand  
> Avinash's note
> carefully enough, as you seem to have, so your note may well make more  
> sense
> than mine..:)
>
> Hope this will sustain you without the crack..;)



> Geeta
>
> Mark Lowe wrote:
>
>> I said no such thing about javascript.
>>
>> I'm in the httpsession != evil school and I'd say this isn't an
>> occasion where you'd use it as you don't need anything to persist
>> beyond the request (accept this default action thing whatever thats
>> about).
>>
>> The single action class as a type of command dispatcher sounds
>> ingenious. But it has to be using a form property or request parameter
>> otherwise the id in the link wouldn't do what you want. I can see how
>> this has helped make life less complex :o) I assume it extracts a map
>> iterates through is and then selects the relevant 'command' based on
>> the map's contents.
>>
>> You cant submit a form with a link without using javascript. You can
>> use an image as a button, but thats another subject. I have no more
>> suggestions than those I've already made, else I'll start getting  
>> urges
>> to go out and score come crack in an attempt to save my teeth from all
>> the brick-chewing.
>>
>> On 18 Feb 2004, at 14:15, Geeta Ramani wrote:
>>
>>> Hi Avinash:
>>>
>>> I have not followed your description very carefully - my eyes started
>>> glazing over about mid-way..;) - but here's a thought (and I'm only
>>> going by what i remember of your original question, so forgive me if  
>>> I
>>> misspeak..): If you do not have access to the request object, do you  
>>> at
>>> least have access to the session?  In which case how about putting  
>>> the
>>> user in a session variable (maybe right after logon) and then you
>>> should
>>> be able to get his/her userId etc etc wherever you want it from..?  I
>>> know there has been **extensive** discussion in this list re. the  
>>> pros
>>> and cons of using session variables and if you are of the
>>> all-session-vars-are-bad school of thought, this won't do you any  
>>> good.
>>> But personally,  this seems to be a situation where a session  
>>> variable
>>> would come in handy..
>>
>>>
>>> If however this idea wn't work in your situation, you may want to
>>> discuss with your clients their absolute requirement about wanting a
>>> link vs. a button (I believe you indicated earlier that the latter  
>>> case
>>> will pose no prblems for you..?)
>>
>>>
>>> Good luck!
>>> Geeta
>>>
>>> avinash.tiwari@tcs.com wrote:
>>>
>>>>
>>>> Hi Geeta/Paul/Mark/Wendy
>>>>
>>>> What Geeta has suggested is basically the same thing but Paul is  
>>>> using
>>>> JSTL for that.
>>>> But such is the restriction of my application that I can not use
>>>> request object to get the values from form directly by calling
>>>> request.getParameter(...);
>>>>
>>>> I will explain this why.
>>>>
>>>> The framework that we are working with right now gives some add on
>>>> features over struts. Basically taken from StrutsEJB framework.
>>>>
>>>> We are using Map Based DTOs to transfer data from view layer to  
>>>> model
>>>> layer and other way round.
>>>> We are also using the feature of Command Files. I will explain it  
>>>> what
>>>> it is for people unaware of StrutsEJB framework.
>>>>
>>>> In Struts we are supposed to mention the Action Class in the
>>>> struts-config.xml. And from the Action class we generally call some
>>>> java programs (say command files) to access the model layer  
>>>> basically
>>>> to avoid keeping business logic in Action Classes.
>>>>
>>>> But in my framework we just need to mention the Command file name in
>>>> struts-config.xml instead of Action classes. There is only one  
>>>> action
>>>> class that is DefaultAction class which handles all the requests and
>>>> diverts the program control to the command file. I will give here  
>>>> one
>>>> typical entry in my struts-config.xml for your reference.
>>>>
>>>> <action
>>>>     path="/CreateUser"
>>>>     type="framework.common.web.DefaultAction"
>>>>     name="UserForm"
>>>>     scope="request"
>>>>     input = "/CreateUser.jsp"
>>>>     parameter="app.cmd.CreateUserCmd">
>>>>     <forward name="Success" path = "/UserSucc.jsp" />
>>>>   </action>
>>>>
>>>> in the above action tag the attribute parameter is the name of the
>>>> command file where i would like my control to go after the form gets
>>>> submitted.
>>>>
>>>> Now the problem is in the Command File "CreateUserCmd" where i would
>>>> keep my business logic -- i dont have the "request" object. so i  
>>>> cant
>>>> do a
>>>> "request.getParameter(.....); " here.
>>>>
>>>> the way i get values from forms is like this.
>>>>
>>>> if I have this code in JSP
>>>> <html:text property="dto(txtUsname)" styleClass="listItem" size="14"
>>>> />
>>>>
>>>> I will have to write the following code in my command file to get  
>>>> the
>>>> value of "User Name"
>>>> String UserName = (String)paramDTO.get("txtUsName");
>>>>
>>>> As Mark/Wendy were asking me why i cant use JavaScript is because
>>>>
>>>> whenever i use something like this in JavaScript I get javascript
>>>> error at runtime
>>>> document.UserForm.dto(txtUsName).value = val;
>>>> document.UserForm.submit();
>>>>
>>>> This is obvious because whenever javascript parses something like
>>>> dto(txtUsName) it takes it as a function call.
>>>>
>>>> I hope I could explain the problem properly.
>>>>
>>>> Regards
>>>> Avinash Tiwari
>>>> Tata Consultancy Services
>>>> Mailto: avinash.tiwari@tcs.com
>>>> Website: http://www.tcs.com
>>>>
>>>>
>>>> "Geeta Ramani"
>>>                                               Struts Users Mailing  
>>> List
>>>   <geeta.ramani@cmpco.com>                 To
>>> <struts-user@jakarta.apache.org>
>>>
>>>   02/17/2004 09:57 PM                      cc
>>>           Please respond to           Subject Re: Form Submission
>>>      "Struts Users Mailing List"
>>>    <struts-user@jakarta.apache.org>
>>>
>>>>
>>>>
>>>>
>>>> Avinash:
>>>>
>>>> How about trying something like this:
>>>>
>>>> <%String myLink = "/EmplyeeDetailAction.do?employeeId=" +  
>>>> employeeId;
>>>> %>
>>>>
>>>> <html:link page="<%=myLink">Employee Detail Page</html:link>
>>>>
>>>> Regards,
>>>> Geeta
>>>>
>>>> avinash.tiwari@tcs.com wrote:
>>>>
>>>>>
>>>>> I want to use a hyperlink instead -
>>>>>
>>>>> for example
>>>>> On a typical employee list page clicking the employee id of an
>>>>> employee takes you to the employee detail page.
>>>>>
>>>>> In this scenario employee id can not be displayed over a button -  
>>>>> it
>>>>
>>>>> has to be a hyperlink..
>>>>>
>>>>> Use of javascript is restricted. So i cant call a javascript
>>>> function
>>>>> to set the action atribute and then call the submit function.
>>>>>
>>>>> Avinash Tiwari
>>>>> Tata Consultancy Services
>>>>> Mailto: avinash.tiwari@tcs.com
>>>>> Website: http://www.tcs.com
>>>>>
>>>>>
>>>>> Mark Lowe <mark.lowe@talk21.com>
>>>>                                           To "Struts Users Mailing
>>>> List"
>>>>
>>>> <struts-user@jakarta.apache.org>
>>>>  02/17/2004 08:57 PM
>>>>                                           cc
>>>>          Please respond to
>>>>     "Struts Users Mailing List"      Subject Re: Form Submission
>>>>   <struts-user@jakarta.apache.org>
>>>>
>>>>>
>>>>>
>>>>>
>>>>> May I ask why you don't want a submit button?
>>>>>
>>>>>
>>>>> On 17 Feb 2004, at 15:55, avinash.tiwari@tcs.com wrote:
>>>>>
>>>>>>
>>>>>> Hi
>>>>>>
>>>>>> How can we submit a form without using <html:submit> tag. I
dont
>>>>> want
>>>>>> to use JavaScript for this?
>>>>>>
>>>>>> Thanks & Regards
>>>>>>  Avinash Tiwari
>>>>>>  Tata Consultancy Services
>>>>>>  Mailto: avinash.tiwari@tcs.com
>>>>>>  Website:
>>>>>> http://
>>>>>>
>>>>>
>>>> www.tcs.com<InterScan_Disclaimer.txt>-------------------------------

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