Re: [flexcoders] Data Binding Question - will both work?

[nwebb]

Thanks Matt :]Much appreciated.On 9/20/06, Matt Chotin <[EMAIL PROTECTED]> wrote:













  


    
            









I think we made that change between beta3
and release so if things are working for you now I believe you're set.  But
your preferred choice is preferred by us too I think J


 

Matt

 









From: [EMAIL PROTECTED]
ups.com
[mailto:flexcoders@yahoogroups.com] On Behalf
Of nwebb
Sent: Tuesday, September 19, 2006
8:59 AM
To: [EMAIL PROTECTED]ups.com
Subject: [flexcoders] Data Binding
Question - will both work?



 







Hi, I've
just seen part of a Flex training video that I think is incorrect or outdated
(beta 3 was being used at the time)
I just want to double-check that this really is the case.

The video says that the code below would *not* take full advantage of data
binding (ie  the data will initially appear in the DataGrid, but it will
not stay updated): 

<mx:HTTPService id="heroesDataRequest" url=""
/> 
<mx:DataGrid dataProvider="{heroesDataRequest.lastResult.superheroes.hero}"
/>

However, I read in the Flex 2 docs that an HTTPService request will, by deault
return an ArrayCollection (makeObjectsBindable is true by default), and I
am using the data binding syntax in the form of the curly braces. Furthermore,
in order to try and test, I used buttons to change the data in the HTTPService's
lastResult object, and the changes do always seem to be reflected in my
DataGrid: 

<mx:HTTPService id="heroesDataRequest" url=""
makeObjectsBindable="true" /> 
<mx:DataGrid dataProvider="{heroesDataRequest.lastResult.superheroes.hero
}"    />
<mx:Button label="button 1" click="heroesDataRequest.lastResult.superheroes.hero[0].name
= 'AAA';" />
<mx:Button label="button 2" click="heroesDataRequest.lastResult.superheroes.hero
[0].name = 'BBB';" />

The tutorial goes on to say that to make binding work properly I should use the
HTTPServices 'result' event handler, and assign the data to a bindable
ArrayCollection variable that I create - this is probably my preferred choice
anyway, but I am curious to know whether both ways are equally appropriate. 

Can I safely say that data binding is working fully in the first example, or
could there be scenarios in which it will not work but where the alternative
method would? If so, could someone enlighten me? I'm not yet confident of the
best way to check/debug this kind of thing myself. 

Cheers,
Neil 










      

    
    












__._,_.___





--
Flexcoders Mailing List
FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com








   



    


  
  
    SPONSORED LINKS
  
          
                  
            
        Software development tool
      
                      
        Software development
      
                      
        Software development services
      
              
                        
            
        Home design software
      
                      
        Software development company
      
                    
           
  






      
      Your email settings: Individual Email|Traditional 
      Change settings via the Web (Yahoo! ID required) 
      Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured 
           
        Visit Your Group 
       |
      
        Yahoo! Groups Terms of Use
       |
      
       Unsubscribe 
       
 
    
  




__,_._,___