comboBox两级联动,数据从数据库中取出来，第二级数据死活加载不进store，求帮助

Question

数据加载的时候，城市的下拉菜单能出来，选择了城市之后想要选择地区，地区的placestore就一直是空的。
困扰了好久，求解决。
[code="java"] var citystore=new Ext.data.Store({
proxy:new Ext.data.HttpProxy({
url:'city_query.action'
}),
reader:new Ext.data.JsonReader({
totalProperty:'total',
root:'cityList'
},[
{name:'id'},
{name:'name'}
])

});

var placestore=new Ext.data.Store({
    proxy:new Ext.data.HttpProxy({
        url:'place_query.action'
    }),
    reader:new Ext.data.JsonReader({
        totalProperty:'total',
        root:'placeList'
        },[
        {name:'id',type:String},
        {name:'name',type:String},
        {name:'cityid',type:String}
    ])
});

var comboCity=new Ext.form.ComboBox({
    //applyTo:'comboCity',
    fieldLabel:'城市',
    emptyText:'请选择',
    autowidth:true,
    selectOnFocus:true,
    forceSelection: true,
    mode:'local',
    triggerAction:'all',
    //triggerAction:'query',
    name:'place.cityid',
    store:citystore,
    valueField:'id',
    displayField:'name',
    hiddenName:'id'
});

var comboPlace=new Ext.form.ComboBox({
    //applyTo:'comboPlace',
    fieldLabel:'地区',
    emptyText:'请选择',
    autowidth:true,
    selectOnFocus:true,
    forceSelection: true,       
    mode:'local',
    triggerAction:'all',
    //triggerAction:'query',
    //valueField:'id',
    displayField:'name',
    hiddenName:'name',
    name:'place.name',
    store:placestore    
});

citystore.load();
comboCity.on('select',function(comboBox){
    var value=comboBox.getValue();
    placestore.load({params:{id:value}});
    alert(value);
});
var theForm=new Ext.FormPanel({
    labelSeparator :":",
    layout:'form',
    frame :true,//渲染面板为自定义的圆角边框
    border :false,//不显示面板体边框
    autoHeight: true,
    items:[{
        xtype:'textfield',
        fieldLabel:'地区编号',
        name:'place.id',
        displayField:'id',
        maxLength:6,
        autowidth:true,
        allowBlank:false
    },
        comboCity,comboPlace
            ]       
});[/code]

Answer 1

可能 新增的时候 没向后台传cityid值
comboCity 这个是 城市的下拉框吧 向后台传得属性名是hiddenName:"cityid"

我是经常用火狐 看向后台传得参数 或者后台向页面发得参数 这也非常容易是页面问题还是后台的问题