datagrid中combobox监听事件

Question

Answer 1

               <th data-options="field:'productid',width:100,
                        formatter:function(value,row){
                            return row.productname;
                        },
                        editor:{
                            type:'combobox',
                            options:{
                                valueField:'productid',
                                textField:'productname',
                                method:'get',
                                url:'products.json',
                                onSelect:function(rec){alert(JSON.stringify(rec))},
                                required:true
                            }
                        }">Product</th>