$.ajax方法获取json数据，解析不出来json中数据

[小圈09]

代码：
function loadData(pars) {

$.ajax({
url: "http://192.168.1.9:71/WebService.asmx/v_getQuesInfoDet?jsoncallback=?",
dataType:"json",
data: pars,
cache: false,
success:OnSuccess,
error:OnError
});
}

function OnSuccess(json) {
document.getElementById("contentIf").innerText = json.result;
var defaultData = json.result;
alert(defaultData[0].GID);
alert(defaultData[0].Stem);
}
获取到异步数据
[{"GID":"d51fadd7f64c47a29afbc05472facaa7","ItemTypeID":null,"Stem":"<p>
　Writing <br />
　　Directions: For this part, you are allowed 30 minutes to write an essay commenting on the saying ‘Learning is a daily experience and a lifetime mission.” You can cite examples to illustrate the importance of lifelong learning. You should write at least 120 words but no more than 180 words.</p>"}]

但是alert弹出：undefined

[slwsss]

alert(json[0].GID);试试

[xuzuning]

var defaultData = json; 没有 .result

[斯洛文尼亚旅游]

前提是你进入了OnSuccess回调没有。。看你指定了端口，是不是跨域了？标准浏览器下端口不一致也算跨域，会报错进入不了OnSuccess回调

[小圈09]

谢谢，1,2楼的试了都不行，不弹出认识内容

[斯洛文尼亚旅游]

加红色那句看执行了没有，没有就是100%跨域报错了 function OnSuccess(json) { alert('success')

[小圈09]

OnSuccess获取到数据了呀，我是异步加载的 这就是 json.result获取到的数据，能获取到数据就是这个数据解析不出来 [{"GID":"d51fadd7f64c47a29afbc05472facaa7","ItemTypeID":null,"Stem":"<p> 　Writing <br /> 　　Directions: For this part, you are allowed 30 minutes to write an essay commenting on the saying ‘Learning is a daily experience and a lifetime mission.” You can cite examples to illustrate the importance of lifelong learning. You should write at least 120 words but no more than 180 words.</p>"}]

[小圈09]

请看清楚，我都说获取到数据了，OnSuccess成功了！！！
alert(json.result);
结果是

[小圈09]

我就是拿不到里面stem字段中的值

[斯洛文尼亚旅游]

由回车导致内容不闭合了，parse或者eval都会出错，要先替换掉

json.result=json.result.replace(/\n/g,'')
alert(json.result)
 var defaultData =eval('('+ json.result+')');

[斯洛文尼亚旅游]

引用 7 楼 syy0272006 的回复:

请看清楚，我都说获取到数据了，OnSuccess成功了！！！ alert(json.result); 结果是

你那个是字符串又不是对象，要eval转为对象，所以你数据都没说清楚怎么获取 var defaultData =eval('('+ json.result+')');

[小圈09]

这几种转化方式我都试了，都不弹出任何东西

[不知世事深浅]

遇到同样问题了 不知道楼主解决没有