如何访问JSON和Javascript中的元素

Question

How do I access something like this with Javascript and Jquery?

"condition" : [{"conditionId":["3000"],"conditionDisplayName":["Used"]}]

(this is just an excerpt)

I tried using item.condition and I got:
[{"conditionId":["3000"],"conditionDisplayName":["Used"]}] as a result.

How do I get the conditionDisplayName ?

I've also tried using : item.condition.conditionDisplayName but it doesn't work nor does item.condition[1]

Answer 1

You're almost there but your condition is an array with one object so you need to use the array notation to access it:

var displayName = item.condition[0].conditionDisplayName;

If there could be more than one object in the array, you can use a loop:

for(var i=0; i<item.condition.length; i++) {
    console.log( item.condition[i].conditionDisplayName );
}

Answer 2

condition is an array, as is conditionDisplayName , so you will need to access their members using an index. For example, to get the first displayName of the first condition you would do:

var displayName = item.condition[0].conditionDisplayName[0]

Answer 3

您可以使用数组索引获取对象

var displayName = obj.condition[0].conditionDisplayName;

Answer 4

在您的情况下，您应该尝试：

item.condition[0].conditionDisplayName

Answer 5

var array = [{"conditionId":["3000"],"conditionDisplayName":["Used"]}]

// Not right - show ["Used"]
console.log(array[0].conditionDisplayName);

// Right - show "Used"
console.log(array[0].conditionDisplayName[0]);

You can see this here: http://jsfiddle.net/bs9kx/