如何使用JavaScript找出从xml检索的元素数量

Question

I have a xml like this

<Summary>
    <Data>data1</Data>
    <Data>data2</Data>
    <Data>data3</Data>
    ...
</Summary>

Initially i used to do this when data was fixed

$(xml).find('Data').eq(0).text() // I got data1
$(xml).find('Data').eq(1).text() // I got data2
$(xml).find('Data').eq(2).text() // I got data3

What if i dont know how many Data elements are there. Is there any way to find out how many data elements i retrieved in my ajax request.

Answer 1

我不知道我是否完全了解您想要什么，但是下面的语句将为您提供数据元素的数量：

var howMany = $(xml).find('Data').length;

Answer 2

you can do something like this

<Summary>
    <Data>data1</Data>
    <Data>data2</Data>
    <Data>data3</Data>
    ...
</Summary>

/

/ initialized to some XML resembling your example
var dataXML = new XML("");  

// build XMLList
var dataList = dataXML['Data'];  

// alternative syntax
// var dataList = dataXML.Data;  

// how many data nodes are under a given data node?
var length = dataList.length();