我有以下代码,应从xml文件中的每个父节点返回两个子节点值。
<?php session_start(); ?>
<html>
<head>
<title> ADM Asset Availability </title>
<!-- <meta http-equiv="refresh" content="10"> -->
</head>
<body onload="AssetUpdate()">
<script type="text/javascript">
var xhttp;
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
AssetUpdate(this);
}
};
xhttp.open("GET", "Assets.xml", true);
xhttp.send();
function AssetUpdate(xml) {
var n, x, i, txt, xmlDoc;
xmlDoc = xml.responseXML;
txt = "";
x = xmlDoc.getElementsByTagName("Asset");
for (i = 0; i < x.length; i++) {
var txt1 = "<dvi class='rowContainer'>";
var txt2 = x[i].getElementsByTagName("AssetName")[0].childNodes[0].nodeValue;
var txt3 = "-";
var txt4 = x[i].getElementsByTagName("Live")[0].childNodes[0].nodeValue;
var txt5 = "</div>";
txt += txt1 + txt2 + txt3 + txt4 + txt5;
}
document.getElementById("Asset").innerHTML = txt;
};
</script>
<div id="Asset">
</div>
</body>
</html>
txt2
毫无问题地返回请求的值。但是,txt4
(结构正确)会导致在
未捕获的TypeError:无法读取AssetUpdate AssetPage.php:33上未定义的属性'childNodes'
我尝试了大约30种代码,循环和标记名称的变体,但仍然会导致相同的错误。
请帮助
这是供参考的xml;
<?xml version="1.0" ?><Assets>
<Asset>5
<AssetID>1</AssetID>
<AssetName>Laser</AssetName>
<Live>Test</Live>
</Asset>
<Asset>7
<AssetID>2</AssetID>
<AssetName>Press</AssetName>
<Live>Test1</Live>
</Asset>
<Asset>9
<AssetID>3</AssetID>
<AssetName>Fab</AssetName>
<Live>Test2</Live>
</Asset>
<Asset>blue
<AssetID>78</AssetID>
<AssetName>Paint</AssetName>
<Live>Test3</Live>
</Asset></Assets>
我已经检查并找到了这个post,但没有在该线程中发现错误。
编辑
Navigated to http://localhost/ADMApp/AssetPage.php
AssetPage.php:24 Uncaught TypeError: Cannot read property 'responseXML' of undefined
at AssetUpdate (AssetPage.php:24)
at onload (AssetPage.php:6)
AssetUpdate @ AssetPage.php:24
onload @ AssetPage.php:6
AssetPage.php:34 HTMLCollection []length: 0__proto__: HTMLCollectionitem: ƒ
item()arguments: (...)caller: (...)length: 1name: "item"__proto__: ƒ
()apply: ƒ apply()arguments: (...)bind: ƒ bind()call: ƒ call()caller:
(...)constructor: ƒ Function()length: 0name: ""toString: ƒ
toString()Symbol(Symbol.hasInstance): ƒ [Symbol.hasInstance]()get arguments:
ƒ ()set arguments: ƒ ()get caller: ƒ ()set caller: ƒ ()__proto__:
Object[[FunctionLocation]]: <unknown>[[Scopes]]: Scopes[0][[Scopes]]:
Scopes[0]length: (...)namedItem: ƒ namedItem()constructor: ƒ
HTMLCollection()Symbol(Symbol.iterator): ƒ
values()Symbol(Symbol.toStringTag): "HTMLCollection"get length: ƒ
length()__proto__: Object
AssetPage.php:35 undefined
AssetPage.php:36 Uncaught TypeError: Cannot read property 'childNodes' of
undefined
at AssetUpdate (AssetPage.php:36)
at XMLHttpRequest.xhttp.onreadystatechange (AssetPage.php:15)
AssetUpdate @ AssetPage.php:36
xhttp.onreadystatechange @ AssetPage.php:15
XMLHttpRequest.send (async)
(anonymous) @ AssetPage.php:19
AssetPage.php:19 XHR finished loading: GET
"http://localhost/ADMApp/Assets.xml".
(anonymous) @ AssetPage.php:19
我不知道显示此错误代码的更好方法,所以如果这不正确,请教育我(下面是实际显示的图像)。
如果您需要我全面扩展HTMLCollection,请告诉我,但这是一个很大的级联。
感谢您的帮助!
答案 0 :(得分:0)
好吧,我仍然会感激任何其他输入,但是据我所知,除了在另一台计算机上运行外,我没有做任何更改。在另一台计算机上运行我的PC后,重新启动它也可以正常工作。 我的想法是这是我的本地主机服务器出现的问题,该服务器在重新启动后自行解决了??
谢谢 康纳