Convert HierarchicalCollectionView to ArrayCollection

Question

I'm trying to retrieve the ArrayCollection data provided to DataGrid and AdvancedDataGrid. While gridID.dataProvider works for flat data, I'm getting coercion error when data is heirarchical. Is there a way to retrieve the original ArrayCollection data? Parsing doesn't seem to work either. TIA!

Answer 1

If you have a GroupingCollection2 instance, you can still retrieve its source afterward by using something like var ac:ArrayCollection = gc.source as ArrayCollection;
<mx:AdvancedDataGrid id="myADG"   
    <mx:dataProvider>
      <mx:GroupingCollection2 id="gc" source="{dpFlat}">
        <mx:grouping>
          <mx:Grouping>
            <mx:GroupingField name="Region"/>
            <mx:GroupingField name="Territory"/>
          </mx:Grouping>
        </mx:grouping>
      </mx:GroupingCollection2>
    </mx:dataProvider> 
    <mx:columns>
      <mx:AdvancedDataGridColumn dataField="Region"/>
      <mx:AdvancedDataGridColumn dataField="Territory"/>
      <mx:AdvancedDataGridColumn dataField="Territory_Rep"/>
      <mx:AdvancedDataGridColumn dataField="Actual"/>
      <mx:AdvancedDataGridColumn dataField="Estimate"/>
    </mx:columns>
  </mx:AdvancedDataGrid>
In the case of this example from the livedocs, var ac:ArrayCollection = gc.source as ArrayCollection; would return a reference to dpFlat.