我有一个基于w3schools课程的XML消息:
<?xml version="1.0" encoding="UTF-8""?>
<bookstore>
<book category="COOKING">
<title lang="en">Everyday Italian</title>
<author>Giada De Laurentiis</author>
<year>2005</year>
<price>30.00</price>
</book>
<book category="CHILDREN">
<title lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
<book category="WEB">
<title lang="en">XQuery Kick Start</title>
<author>James McGovern</author>
<author>Per Bothner</author>
<author>Kurt Cagle</author>
<author>James Linn</author>
<author>Vaidyanathan Nagarajan</author>
<year>2003</year>
<price>49.99</price>
</book>
<book category="WEB">
<title lang="en">Learning XML</title>
<author>Erik T. Ray</author>
<year>2003</year>
<price>39.95</price>
</book>
</bookstore>
我有这个XPath脚本:
<!DOCTYPE html>
<html>
<body>
<script>
function loadXMLDoc(dname)
{
xhttp=new XMLHttpRequest();
xhttp.open("GET",dname,false);
xhttp.send("");
return xhttp;
}
var x=loadXMLDoc("books.xml");
var xml=x.responseXML;
path="/bookstore/book/price";
{
var nodes=xml.evaluate(path, xml, null, XPathResult.ANY_TYPE, null);
var result=nodes.iterateNext();
while (result)
{
document.write(result.childNodes[0].nodeValue);
document.write("<br>");
result=nodes.iterateNext();
}
}
</script>
</body>
</html>
截至目前,代码正确显示了价格清单,这正是我想要的。但后来我想在最后显示找到的实例数量;在out case的情况下应该只返回4。 我尝试添加:
document.write("<br>");
document.write(count(//price));
,但它不起作用,我不知道哪里出错了。谢谢你的帮忙。
答案 0 :(得分:0)
while (result)
{
document.write(result.childNodes[0].nodeValue);
document.write("<br>");
result=nodes.iterateNext();
}
document.write(nodes.length);