Ext js中CheckBoxGroup的动态绑定

    <script  type="text/jscript">
     var WinXianCode;
    function SearchGetXianLuF(Type)
    {
        if(!WinXianCode)
        {
            //创建窗体框
             WinXianCode=new Ext.Window({
           id:'WinXianCode',
           width:,
           height:,
           closeAction:'hide',
           autoScroll:true,
           model:true,
           items : [
                    new Ext.form.FormPanel({
                        frame:true,
                        defaultType:'textfield',
                        id:'c-form',
                        labelWidth :,
                        defaults:{width:},
                        })
                   ],
           title:'报价项目包含不包含项'
          });
        }
        QuotedPriceView(Type);
        //弹出窗体
        WinXianCode.show('XianLuCode');
    }
    </script>

    <script type="text/javascript">

    //报价数据加载
    function QuotedPriceView(Type)
    {
        var QuotedPriceCheckboxItems = [];
        Ext.MessageBox.wait('报价数据正在加载','请稍等...');
        Ext.Ajax.request({
            url:'QuotedPrice.aspx',
            method : 'post',
            success: function (r) {
                Ext.MessageBox.hide();
                var data = Ext.decode(r.responseText).QuotedPricelist;
                if(data.length>)
                {
                    //获取报价：开始
                    for(var i=;i<data.length;i++)
                    {
                      QuotedPriceCheckboxItems.push
                      ({
                           id:'CheckBox'+data[i].name,
                           name:data[i].name,
                           boxLabel: data[i].boxLabel,
                           inputValue:data[i].inputValue,
                           listeners:{
                              check:function(el,checked){
                                    var coninter=Ext.getCmp("QuotedPriceS");
                                    if(coninter!=undefined)
                                    {
                                        var inter=coninter.items;
                                        var xq=[];
                                        for (var i = ; i < inter.length; i++)
                                        {
                                            if (inter!=null && inter.get(i).checked)
                                            {
                                                xq.push(inter.get(i).inputValue);
                                            }
                                        }
                                        if(Type==)
                                        {
                                         //费用包含
                                         Ext.getCmp("ratedetail").setValue(xq.join('\n'));

                                        }
                                        if(Type==)
                                        {
                                          //费用不包含
                                         Ext.getCmp("ratedetailno").setValue(xq.join('\n'));
                                        }
                                    }
                              }
                            }
                      });
                    }
                    //获取报价：结束

                   //定义多选的报价数组：开始
                   var checkGroup = new Ext.form.CheckboxGroup({
                        id:'QuotedPriceS',
                        xtype:'checkboxgroup',
                        fieldLabel:'报价',
                        width:,
                        columns:,
                        items:QuotedPriceCheckboxItems
                        });
                  //定义多选的报价数组：结束

                  //多选的容器：开始
                  var cbp = Ext.getCmp("c-form");
                  cbp.items.add(checkGroup);
                  cbp.show();
                  cbp.doLayout();
                  //多选的容器：结束
                }
            }
        });
    }
    </script>

后台返回的json数据：

JArray jar = new JArray();
        DataSet db_QuotedPrice = SPBll.Packages.getQuotedPrice();
        foreach (DataRow row in db_QuotedPrice.Tables[].Rows)
        {
            jar.Add(new JObject(
                new JProperty("name", row["id"].ToString()),
                new JProperty("inputValue", row["cname"].ToString()),
                new JProperty("boxLabel", row["cname"].ToString())
                ));
        }
        Response.Write(new JObject(new JProperty("QuotedPricelist", jar)));