本文介绍了使用jQuery / AJAX德code JSON的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我试图去code使用jQuery的JSON。下面是我得到(例如一类,这里一个学生):
{学生:[{姓名:约翰,等级:17}],TotalClass:17,TotalCount:1,}
这是我做的:
$ j.ajax({
键入:POST,
网址:class.aspx /的getClass',
的contentType:应用/ JSON的;字符集= UTF-8,
数据类型:JSON,
成功:函数(MSG){
$ j.each(味精,功能(索引,元){
警报(element.TotalClass);
});
},
});
它口口声声说未定义的警报(但我收到正确的JSON)。知不知道我做错了什么?
解决方案
{学生:[{姓名:约翰,等级:17}],TotalClass :17,TotalCount:1,}
是不是有效的JSON!
假设你有一个有效的 JSON
像这样
{
学生:
{
名:约翰,
等级:17
}
]
TotalClass:17,
TotalCount:1
}
您可以访问值,像这样
警报(TotalClass:+ msg.TotalClass);
//环通学生
$每个(msg.Students,函数(指数,项目){
警报(item.Name + - + item.Grade)
});
工作示例: http://jsfiddle.net/ncbLF/5/
使用 jsonlint 验证JSON
所以,你的code可以简化为
$。的getJSON(class.aspx /的getClass,函数(MSG){
警报(TotalClass:+ msg.TotalClass);
$每个(msg.Students,函数(指数,项目){
警报(item.Name + - + item.Grade)
});
});
I'm trying to decode a JSON with jQuery.Here's what I get (for instance a class, here with one student):
"{"Students":[{"Name":John,"Grade":17,}],"TotalClass":17,"TotalCount":1,}"
here's what I do:
$j.ajax({
type: 'POST',
url: 'class.aspx/getClass',
contentType: 'application/json; charset=utf-8',
dataType: 'json',
success: function (msg) {
$j.each(msg, function (index, element) {
alert(element.TotalClass);
});
},
});
It keeps saying undefined in the alert (but I recieve the right JSON). Any idea what I'm doing wrong?
解决方案
{"Students":[{"Name":John,"Grade":17,}],"TotalClass":17,"TotalCount":1,}
is not valid JSON !
Assuming you have a valid JSON
like this
{
"Students": [
{
"Name": "John",
"Grade": "17"
}
],
"TotalClass": " 17",
"TotalCount": "1"
}
You can access the values like this
alert("TotalClass : "+msg.TotalClass);
//loop thru students
$.each(msg.Students,function(index,item){
alert(item.Name+ " - "+item.Grade)
});
Working sample : http://jsfiddle.net/ncbLF/5/
Use jsonlint to validate JSON
So your code can be simplified to
$.getJSON("class.aspx/getClass",function(msg){
alert("TotalClass : "+msg.TotalClass);
$.each(msg.Students,function(index,item){
alert(item.Name+ " - "+item.Grade)
});
});
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