如何在javascript中循环JSON关联数组？ [英] How to loop through an JSON associative array in javascript?

问题描述

我从服务器获得JSON响应，我必须在javascript中循环遍历数组并获取值。但我似乎无法循环它。

I'm getting a JSON response from the server and i have to loop through the array in javascript and get the values. But I cant seem to loop throught it.

数组的JSON响应如下所示：

The JSON response of the array looks like this:

{
   "1": "Schools",
   "20": "Profiles",
   "31": "Statistics",
   "44": "Messages",
   "50": "Contacts"
}

我只想循环遍历它以获取ID和名称并在页面上填充一些值。

I just want to loop through it to get the ID and Name and populate some values on the page.

我试过：

$.each(response, function(key, value) {
    alert(key + ' ' + value);
});

// and 

for (var key in response) {
    alert(key + ' ' + response[key]);
}

但两者都没有给出正确的值。

But neither give the right values.

提前感谢您的帮助。

回复：
您好，
我在第二个循环中得到的回复是：

Reply: Hi, The response I'm getting with the second loop is:

0 {
1 "
2 1
3 "
4 :
5 "
6 S

等等

这意味着它将整个响应作为字符串并将其作为键/值分割。

So that means its going through the whole response as a string and spliting it as key/value.

谢谢

推荐答案

您的问题是您没有解析JSON字符串。因此，您的foreach将遍历JSON字符串中的字符。

Your problem is that you are not parsing the JSON string. Therefore, your foreach is going through the characters in the JSON string.

// If you are using jQuery.ajax, you can just set dataType to 'json' 
// and the following line will be done for you
var obj  = jQuery.parseJSON( response );
// Now the two will work
$.each(obj, function(key, value) {
    alert(key + ' ' + value);
});


for (var key in obj) {
    alert(key + ' ' + response[key]);
}

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