(Flex & actionscript 3) convert result in datagrid control to json data -

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i want convert result in spark datagrid cotrol json data

i'm using actionscript 3 , flex

this datagrid :

<s:datagrid id="_gridcentre" left="5" right="5" top="5" bottom="5"                                 bordervisible="true" dataprovider="{getcentreresult.lastresult}"                                 fontsize="11">     <s:columns>     <s:arraylist>         <s:gridcolumn visible="false" datafield="codecentre"headertext="code"/>         <s:gridcolumn datafield="nomcentre" headertext="nom centre"/>         <s:gridcolumn datafield="typecentre" headertext="type centre"/>         <s:gridcolumn datafield="milieurecepteur" headertext="milieu récepteur"/>     </s:arraylist>     </s:columns> </s:datagrid>

i did code, not working :

var result:object = _gridcentre.dataprovider object; var myjson:string = json.stringify(result);

i can read objects, when iterate object < result > : 

for each (var item:centre in result)  { alert.show(item.codecentre.tostring()); }

thanks help

the dataprovider instance of array alike class. spark's arraylist or arraycollection class instance, means can try toarray() method, return raw objects contaned into, or if fail - try find type of data provider , invoke it's appropriate method convert contained objects array or other structure can iterate trough.


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