Ext js form.load combobox value问题

Question

id: 'type',
xtype: 'combo',
mode: 'local',
store: new Ext.data.ArrayStore({
fields: ['id', 'name'],
data: [
['1', 'Size'],
['2', 'Color'],
['3', 'Weight']
]
}),
typeAhead: true,
hideTrigger: false,
triggerAction: 'all',
fieldLabel: 'TYPE',
name: 'type',
hiddenName: 'type',
valueField: 'id',
displayField:   'name',
width: 150,
value: '1'
form.load后回传的数据type 是 1 combo自显示"1" form再次提交时type会是"1"
怎样自动显示"Size"?值仍然是"1"
我用setValue('Size')combo显示"Size"
form再次提交时 type会是"Size" 不是 valueField的值

Answer 1

{
    xtype: 'combo',
    mode: 'local',
    fieldLabel: 'Sex',
    name: 'title',
    displayField: 'name',
    valueField: 'value',
    emptyText: '---请选择--',
    store: Ext.create('Ext.data.Store', {
        fields: ['name', 'value'],
        data: [
                                        { name: '男', value: 'Mr' },
                                        { name: '女', value: 'Miss' }
                                    ]
    })
}

Answer 2

    var txtPoliceStation = new Ext.form.ComboBox({
                    fieldLabel: '<font color="red">*</font>所属单位',
                        store: psStores,
                        name: 'PoliceStationId',
                        hiddenName: 'PoliceStationId',
                        valueField: 'Id',
                        displayField: 'PoliceStatName',
                        typeAhead: true,
                        mode: 'remote',
                        triggerAction: 'all',
                        emptyText: '---请选择单位---',
                        selectOnFocus: true,
                        allowBlank: false,  
                        width: 200
                    });