RE: [flexcoders] XML as a dataprovider

[Peter Farland]

First up, Flex is doing more work for you than you realize - the lastResult attribute has been marked with [Bindable] metadata which asks the mxmlc compiler to generate some code to ensure that change events are propagated to interested listeners. For a simplified explanation of what happens in your particular case - when the asynchronous result event comes back from the HTTPService it updates its lastResult property which in turn dispatches a change event which, thanks to some code generated by the mxmlc compiler, propagates this update to the dataProvider property of the AreaChart.   Note the clues from the previous paragraph - results from things like HTTPService or URLLoader are asynchronous so they too rely on you dealing with events (specifically RPC result or fault events). You must understand events and listeners if you want to achieve the same effect manually.   You can use the ActionScript API for HTTPService yourself - just import mx.rpc.http.HTTPService and instantiate an instance of the class yourself and call send() just as you did on the equivalent MXML component.   Alternatively, if you really do want to use URLLoader directly then you'll have to add your own event listeners (see flash.net.URLLoader.addEventListener) to listen for the "complete" event and then set the AreaChart's data provider with the value of the URLLoader.data property manually.   Finally, if you find something that could be improved in the documentation the best way to help is to leave constructive criticism on the live docs for the online version of Flex 2 manual.   Pete   From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Sam Sent: Sunday, October 08, 2006 12:26 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] XML as a dataprovider Hi, I'm trying to use XML as a dataprovider to charts and the short useless blurb in the flex 2 manual isn't helping. If I use <mx:HTTPService to get my xml then bind that to the dataprovider to a <mx:AreaChart it works fine: <mx:HTTPService id="getXML"/> ... <mx:AreaChart width="100%" dataProvider="{getXML.lastResult.xport.data.row}"> ... Where the xml is in the form of: <xport> <data> <row/> ... </data> </xport> But if I try to assign the dataprovider dynamicly in actionscript using a urlloader/urlrequest then doing a : myXML = XML(myLoader.data); as the docs suggest I can't just go: myChart.dataProvider = myXML Or any part of myXML like myXML.xport.data.row Is there a way to stick myXML into the dataprovider or is the correct way to go through all this MXML (I'd rather use AS)? Thanks __._,_.___ -- 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 __,_._,___