extjs formpanel下的commbox

Question

代码如下:var sexds=[{"SexID":"Y","SexName":"男"},{"SexID":"N","SexName":"女"}];
var sexStore=new Ext.data.JsonStore({ data: sexds, fields: ["SexID","SexName"] });
new Ext.FormPanel
    (
        {
            labelWidth: 75,
            frame: true,
            width: 580,
            waitMsgTarget: true,
            items:
            [
                {
                    layout: 'column',
                    border: false,
                    items:
                    [
                       {
                            columnWidth: .34,
                            layout: 'form',
                            border: false,
                            items:
                            [
                               CmoSex = new Ext.form.ComboBox
                                (
                                    {
                                        fieldLabel: ' 性别',
                                        labelStyle: 'width:70px',
                                        width: 170,
                                        editable: false, //不允许输入
                                        name: 'Sex',
                                        store: sexStore,
                                        emptyText: '--请选择--',
                                        allowBlank: false, //不允许为空
                                        blankText: '请选择性别', //错误提示信息
                                        displayField: 'SexName',
                                        valueField: 'SexID',
                                        hiddenName: 'SexID',
                                        mode: 'client',
                                        triggerAction: 'all',
                                        selectOnFocus: true
                                    }
                                )
                            ]
                        }
                    ]});在选择下拉控件的时间报 'this.proxy' 为空或不是对象
这是怎么回事呀，哪里写错了！！！！

Answer 1

{
    x: 425,
        y: 7,
        text:'状态：',
        xtype:'label'
    },{
    x:460,
    y:2,
id:'statusCombo',
xtype:'combo',
valueField: "statusid",   
        displayField: "statevalue",   
mode: 'local',
triggerAction: 'all',
value:'0',
store:new Ext.data.SimpleStore({
        fields: ['statusid', 'statevalue'],
        data : [['0','所有'],['1','未提交'],['2','已提交']]
    }),
width:65,
listeners: {
    select: function(combo,record){
     stSearch();
    }
        }
}

Answer 2

combobox加载的是本地数据-->加上属性mode:'local';

Answer 3

Ext.onReady(function() {
    var sexds = [{
        "SexID": "Y",
        "SexName": "男"
    },
{
    "SexID": "N",
    "SexName": "女"
}];
    var sexStore = new Ext.data.JsonStore({
        data: sexds,
        fields: ["SexID", "SexName"]
    });    var p = new Ext.form.FormPanel({
        renderTo: "form",
        labelWidth: 75,
        frame: true,
        width: 580,
        items: {
            xtype: "combo",
            fieldLabel: ' 性别',
            labelStyle: 'width:70px',
            width: 170,
            editable: false,
            name: 'Sex',
            store: sexStore,
            emptyText: '--请选择--',
            allowBlank: false,
            blankText: '请选择性别',
            displayField: 'SexName',
            valueField: 'SexID',
            hiddenName: 'SexID',
            mode: 'local',
            triggerAction: 'all',
            selectOnFocus: true
        }
    });
});