AdvancedDataGrid and HierarchicalData

[Vimpact]

I'm having a problem with the AdvancedDataGrid and HierachicalData. I have an
HTTPService that is getting data from an XML file off the server. I have a
comboBox that changes which data is currently displayed in an advancedDataGrid.
The problem is that when I choose a different item in the comboBox the data is
not changing in the advancedDataGrid. I'm using HierachicalData and setting
it's source to the comboBox's data. Everything else on the page is updating
fine when I change the comboBox. Any idea why the data grid wouldn't?

<mx:AdvancedDataGrid>
<mx:dataProvider>
<HierachicalData source="{XML(posCombo.selectedItem).estimator.area }"/>
</mx:dataProvider>
<mx:columns>
<mx:AdvancedDataGridColumn dataField="@name" headerText="Area"/>
<mx:AdvancedDataGridColumn dataField="@wt" headerText="Weight"/>
</mx:columns>
</mx:AdvancedDataGrid>

This is the XML...

<position name="Manager">
<estimator>
<area name="1">
<prod name="test1" wt="0.55"/>
<prod name="test2" wt="0.65"/>
</area>
<area name="2">
<prod name="test3" wt="0.45"/>
<prod name="test4" wt="0.35"/>
</area>
<estimator>
</position>
<position name="Representative">
<estimator>
<area name="1">
<prod name="test5" wt="0.24"/>
<prod name="test6" wt="0.45"/>
</area>
<area name="2">
<prod name="test7" wt="0.46"/>
<prod name="test8" wt="0.75"/>
</area>
<estimator>
</position>

Thanks!

[laurent pinson]

you need to refresh your ADG.

try using yourADG.refresh() or yourADG.validateNow()

[sameerb]

Just extend from HierarchicalData, override set source() and dispatch a
collection_change reset event -

package
{
import mx.collections.HierarchicalData;
import mx.events.CollectionEvent;
import mx.events.CollectionEventKind;

public class ModifiedHierarcihcalData extends HierarchicalData
{
override public function set source(value:Object):void
{
super.source = value;
var event:CollectionEvent =
new CollectionEvent(CollectionEvent.COLLECTION_CHANGE) ;
event.kind = CollectionEventKind.RESET;
dispatchEvent(event);
}
}
}

Then use ModifiedHierarchicalData in your Application -

<mx:AdvancedDataGrid>
<mx:dataProvider>
<ModifiedHierarchicalData
source="{XML(posCombo.selectedItem).estimator.area }"/>
</mx:dataProvider>

- Sameer
[url]http://techrays.wordpress.com/[/url]

[Vimpact]

Thanks sameerb! That solved it... that just seems totally backwards to me...