Extjs Google的Suggest的自动提示 从后台取数据

//服务器取数据
 var remoteStore = Ext.create('Ext.data.Store', {
     proxy: ({
         type: "ajax",
         url:"---------路径--------",
         extraParams: ******,
         method: "POST",
         reader: {
             type: 'json',
             rootProperty: "data",
             fields: ["partnerId", "partnerFullName"]
         }
     }),
     listeners:{
         load:function(store ,records ,successful ,eOpts ){
             console.log(successful);
             console.log(eOpts);
         }
     },
     fields: ["partnerId", "partnerFullName"]
 });

 //创建搜索下拉框
 var stockCombo = new Ext.form.ComboBox({
     fieldLabel: '转入账户',
     margin: '15 0 0 30',
     labelWidth: 60,
     hiddenName: 'partnerId',
     hideTrigger: true,
     displayField: 'partnerFullName',
     valueField: 'partnerId',
     forceSelection: true,
     queryDelay: 300,
     enableKeyEvents: true,    　　  //监听输入
     store: remoteStore,
     queryMode:'remote',
     queryParam: 'partnerName',     //查询时往后台的参数
     minChars: 2    　　　　　　　　  //输入两个字符时自动查询
 });