Ext中怎么给下拉框设置默认值？

Question

[code="java"]
var emplyoees = new Ext.form.ComboBox({
id : 'emplyoees',
fieldLabel: '人员',
hiddenName:'emplyoee',
store: emplyoeeStore,
readOnly : true,
valueField : 'name',
displayField:'name',
typeAhead: true,
valueNotFoundText : 0,
mode: 'local',
triggerAction: 'all',
emptyText:'请选择人员',
selectOnFocus:true,
width:190
});
[/code]

现在用Ext创建了一个下拉框，怎么给这个下拉框设置默认值，就是说不选择的时候提交到服务器后它的值是0

Answer 1

emplyoees .on({
'beforerender':function(t){

            this.value=you need value;
        }
    });

不过显示的也是you need value.
可以采用

this.hiddenField.value=you need value