Geoffrey, This is a common misconception about return types. In the Flex docs, the type specified is the lowest subclass supported for the returned data. If the return type is Object, this can include Array, Boolean, String, Number, components, and most custom classes.
But alas that is not the issue here, Houston we have a bug! The error thrown by Flex without the cast is a bug in either ArrayCollection or DataGrid as value returned by the GETTER in selectedIndex should use the valueOf() method and it seems not to. Change this: objTemp = dg.selectedItem; //will throw an error about type coercion To: objTemp = dg.selectedItem.valueOf(); //Returns a ResourceVO correctly no cast, no error. There is at handy new operator "is" in AS3 that is very useful for testing the inheiritance chain at runtime: var mySprite:Sprite = new Sprite(); trace (mySprite is Sprite); // output: true trace (mySprite is DisplayObject); // output: true trace (mySprite is IEventDispatcher); // output: true I added this when the selectRow method is called and it is always true. flash.util.trace( dg.selectedItem is ResourceVO ) //true I believe that within the "is" operator, valueOf() is called automagically. :) Hope this helps, Ted :) -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.1/309 - Release Date: 4/11/2006 -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
