You set the data provider of the series to nothing. myService.lastResult is not set to anything until the HTTPService has returned.
I normally call send(), and then in a seperate function handle the complete event. Then the the lastResult will be set. I suppose you could data bind the data provider of the line series to the lastResult of the HTTPService via BindingUtils. --- In [email protected], "tedgies" <[EMAIL PROTECTED]> wrote: > > Has anyone had any success in creating a chart with a series that > you can add to at runtime? (Like Yahoo finance charts 2.0). I > haven't yet seen an example where the LinSeries is based upon a > changing (growing) set of external xml data files. Below i paste a > snippet where i try to for loop through an Array Collection and > create a separate httpservice call for each dataset (each baseball > player). The httpservice URL is created dynamically based upon the > arraycollection. I don't get any errors, but my chart will not > paint my data. I think my problem is in: > > newSeries.dataProvider = myService.lastResult.item; > > thanks, > Ted > > <mx:Script><![CDATA[ > import mx.rpc.http.mxml.HTTPService; > import mx.charts.chartClasses.StackedSeries; > import mx.charts.chartClasses.Series; > import mx.events.IndexChangedEvent; > import mx.events.ListEvent; > import mx.utils.StringUtil; > import mx.controls.Alert; > import mx.charts.events.ChartItemEvent; > import mx.collections.ArrayCollection; > import mx.utils.ArrayUtil; > import mx.charts.series.LineSeries; > import mx.charts.DateTimeAxis; > import mx.charts.CategoryAxis; > > [Bindable] > public var ItemsInChart:ArrayCollection = new ArrayCollection > ([ > {playerName: "Babe_Ruth", playerID: "123456"}, > {playerName: "Hank_Aaron", playerID: "123457"}]); > > public function initApp():void { > //Loop through the ArrayCollection ItemsinChart and create > a new httpservice and line for each. > var i:int; > for (i = 0; i < ItemsInChart.length; i++) { > var myService:HTTPService = new > HTTPService(); > var playerStr:String = > ItemsInChart.getItemAt(i).playerName; > myService.url = "assets/" + playerStr > + ".xml"; > myService.send(); > > // Create the new series and set its properties. > var series:Array = myChart.series; > var newSeries:LineSeries = new LineSeries; > newSeries.dataProvider = myService.lastResult.item; > newSeries.xField = "Year"; > newSeries.yField = "Home_Runs"; > newSeries.displayName = "Home Runs for Baseball > Greats"; > newSeries.name = "Home Runs"; > // Add the new series to the current Array of series. > series.push(newSeries); > myChart.series = series; > } > } > ]]> > </mx:Script> >
