从responseText获取特定内容 [英] Get specific content off responseText
问题描述
我正在进行ajax调用，我从 responseText 获取内容。
I am making an ajax call and I get the content from responseText.
我通过<确认 alert 在里面， responseText 将整个页面包含为字符串。
I confirm by using alert that inside, the responseText contains the entire page as a string.
没关系。现在我需要从字符串中提取特定内容，方法是将其转换为DOM并使用 getElementsByTagName ， getElementsByName 等...
That's fine. Now I need to extract specific contents from the string by converting it to DOM and using getElementsByTagName, getElementsByName etc...
我的问题是这些似乎都不起作用。
My problem is that none of these seems to work.
我读过许多关于使用 responseXML 而不是 responseText 但这会让我回来 null 。
I've read many references on using responseXML instead of responseText but this gives me back null.
因此，通过坚持 responseText ，我如何获得我想要的特定元素？
So, by sticking to responseText, how can i get the specific elements that I want?
例如，如果我的回复包含以下内容：
For instance if my response contains the following:
<html>
<head>....</head>
<body>....
.....
<table>
<tr>
<td>sometext</td>
<td>someothertext</td>
</tr>
<tr>
<td>sometext</td>
<td>someothertext</td>
</tr>
<tr>
<td>sometext</td>
<td>someothertext</td>
</tr>
</table>
<div> somediv </div>
</body>
</html>
如何访问表格的第二行及其值？或div等..
所以，现在在我的实际html中，我有这样的事情
how can I access the second row of the table and its value? Or the div etc.. so, now in my actual html, i have sth like this
<html>
<head>.....</head>
<body>
<table><tr><td id="test">Test</td></tr></table>
</body>
</html>
我希望在我的实际html表中解析提取的元素/值..
i want the extracted element/value to be parsed inside the table of my actual html..
document.getElementById（'test'）。innerHTML = the_extracted_elements_from_responseText
document.getElementById('test').innerHTML = the_extracted_elements_from_responseText
推荐答案
您需要在html上使用 DOMParser 并在结果文档上使用DOM遍历方法来返回所需的节点。
You need to use a DOMParser on the html and use DOM traversal methods on the resulting document to return the desired node(s).
var parser=new DOMParser();
var xmlDoc=parser.parseFromString(responseText,"text/xml");
var tds = xmlDoc.getElementsByTagName("td");
注意IE需要 new ActiveXObject（Microsoft.XMLDOM）; 而不是。
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