Flex datagrid component and aggregated classes

Question

I have the following question regarding Flex/AIR data grids:

Can I access the value of a var of one aggregated object as a dataField of a column of the DataGrid?

What I would like to have is:

public class A { public var id:String; }

public class B { public var a:A; public var value:uint; }

    <mx:DataGrid id="grid" dataProvider="{items}">
        <mx:columns>
            <mx:DataGridColumn headerText="aId" dataField="a.id"/>
            <mx:DataGridColumn headerText="value" dataField="value"/>
        </mx:columns>
    </mx:DataGrid>

items is an ArrayCollections of B's.

From what I have read and looked in the code for the DataGridColumn this 'a.id' does not work as that value is taken from the data object using the array syntax data[key], I have tried to use a custom item renderer but that did not work either.

Could I get some help with this? I am trying to figure out Flex as home project and I just started out.

What I have also done is to add setter and getter functions for the id field, but this will not work for big class hierarchies. — dr_hoppa

dr_hoppa dr_hoppa · Accepted Answer · 2009-11-24T22:13:13

After some more tries got the problem solved.

<mx:DataGrid id="grid" dataProvider="{items}">
    <mx:columns>
        <mx:DataGridColumn headerText="aId">
            <mx:itemRenderer>
                <mx:Component>
                    <mx:Label text="{data.a.id}"/>
                </mx:Component>
            </mx:itemRenderer>
        </mx:DataGridColumn>
        <mx:DataGridColumn headerText="value" dataField="value"/>
    </mx:columns>
</mx:DataGrid>

Flex datagrid component and aggregated classes

1 Answers