我有以下数据网格：
<mx:DataGrid height="400" width="800" id="adverseEventDataGrid" borderColor="#000000" borderStyle="solid" draggableColumns="false" horizontalCenter="13" verticalCenter="0" verticalAlign="middle">
<mx:columns>
<mx:DataGridColumn headerText="selectToys" dataField="selectToys" width="30" itemRenderer="mx.controls.CheckBox" rendererIsEditor="true" editorDataField="selectedConcepts" textAlign="center"/>
<mx:DataGridColumn headerText="StudyId" dataField="StudyID" visible="false"/>
<mx:DataGridColumn headerText="ConceptId" dataField="ConceptID" visible="true" width="40"/>
</mx:columns>
</mx:DataGrid>
我需要在datagrid中选中复选框时获取值。我怎么得到它？