Question about stacked graph from DB

Question

Hi There.
Ive come up against an interesting issue in my current project. In my prototype I have a stacked column chart (just one column) with the 'sections' of each column being defined as in the Flex docs, i.e. I have 3 column series I will call col1, col2, and col3. This works great but now my problem is that when I start getting data from the DB, I could have any number of column series as I have in the DB data pairs in the form of; col1 - 23, col2 - 34, col3 - 14... And there can be x number of records. Has anyone got any references or ideas about how to go about this?
Thanks in advance.

Answer 1

Getting on with this I can say I have made (some) progress.
The file looks as follows:
<mx:ColumnChart id="columnChart" type="stacked" dataProvider="{this.chartData}" width="507" height="100%" x="781" y="0">
     <mx:horizontalAxis>
          <mx:CategoryAxis categoryField="category" dataProvider="{this.chartData}"/>
     </mx:horizontalAxis>
</mx:ColumnChart>
And the AS part:
private function createChartSeries(event:ResultEvent):void
     var temp:ArrayCollection = event.result as ArrayCollection;
     chartData = new ArrayCollection();
     var i:int;
     chartData.addItem({name:"val1"});
     chartData.addItem({name:"val2"});
     for (i = 0; i < temp.length; i++)
          var series:ColumnSeries = new ColumnSeries();
          series.xField = "name";
          series.yField = temp[i].call_type.toString();
          series.displayName = temp[i].call_type.toString();
          chartData.getItemAt(0)[temp[i].call_type.toString()] = temp[i].cost;
          chartData.getItemAt(1)[temp[i].call_type.toString()] = temp[i].duration;
          columnChart.series.push( series );
     columnChart.dataProvider = chartData;
     columnChart.invalidateSeriesStyles();
     columnChart.series = columnChart.series;
[Bindable]
public var chartData:ArrayCollection;
The event.result is as follows:
[{type:"t1", val1=10, val2=30}, {type:"t2", val1=20, val2=3}]
Now call the "createChartSeries" function the y-axis updates, there are 2 columns (well the grey bit down the bottom), but there are no names (the x-axis values) and the actual data columns do not show up.
Can anyone help me with this one?