How do I set only the first row of a DataGrid as the selected row?

Question

I have a "Go" button on a search form that fetches data into an already data bound grid.  After the data is fetched, I want to make the first row in the Datagrid the selected row, as if the user clicked on it.  If the result set is empty, I don't want the code to crash.  (I only want one row to be able to be selected at a time)
            protected function btnGo_clickHandler(event:MouseEvent):void
                getSBJsResult.token = baa_data_svc.getSBJs(cmbSrch.text);
                grdSBJs. //  ?????  What goes here to select the first row?

Answer 1

This should do it.
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if(myDataGrid.dataProvider.length > 0){
  myDataGrid.selectedIndex = 0;