How to add json data delivered from the action to grid ?

I use the action of Ajax to get the json data from the database ,but I add it to a grid ,the grid cann’t show the data.
the data is the text below

    dhx.ajax().post(rootPath + "/wap/",   {req_noValue:req_noValue1,cust_nameValues:cust_nameValues1},
                                         var  text = [


The method load doesn’t work 。Please give me some advice.
Any help would be appreciated!

In above sample server side must return data only

[ { "cust_nameValues":"XXX","id":"","isSuccess":"1","multipartRequestHandler":null,"req_noValue":"X20110549097","servletWrapper":{} } ]

there is no need for "var text = "