flex - Sorting in Advanced Datagrid -

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i have advanced datagrid sorting. think string sorting default. need sorting in number. how can achieve number sorting?

for example: have row numbers 1 100 . need number sorting 1,10,100.

in advanceddatagridcolumn add sortcomparefunction:

<mx:advanceddatagridcolumn sortcomparefunction="numbersorter"  sortdescending="true" datafield="number" headertext="formal name" width="280"/>

add function somewhere in scripts

<mx:script>     <![cdata[          import mx.utils.objectutil         public function numbersorter(itema:object, itemb:object):int{         return objectutil.numericcompare(itema.number, itemb.number);     }      ]]> </mx:script>

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