javascript 从 responseText 中获取特定内容
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Get specific content off responseText
提问by nikolas
I am making an ajax call and I get the content from responseText.
我正在进行 ajax 调用，我从responseText.
I confirm by using alertthat inside, the responseTextcontains the entire page as a string.
我通过alert在里面使用来确认，responseText包含整个页面作为string.
That's fine. Now I need to extract specific contents from the string by converting it to DOM and using getElementsByTagName, getElementsByNameetc...
没关系。现在，我需要将其转换为DOM并使用提取从字符串具体内容getElementsByTagName，getElementsByName等...
My problem is that none of these seems to work.
我的问题是这些似乎都不起作用。
I've read many references on using responseXMLinstead of responseTextbut this gives me back null.
我已经阅读了许多关于使用responseXML而不是的参考资料，responseText但这让我回到了null.
So, by sticking to responseText, how can i get the specific elements that I want?
那么，通过坚持responseText，我怎样才能获得我想要的特定元素？
For instance if my response contains the following:
例如，如果我的回复包含以下内容：
<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>
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
如何访问表的第二行及其值？或者 div 等等。所以，现在在我的实际 html 中，我有这样的东西
<html>
<head>.....</head>
<body>
<table><tr><td id="test">Test</td></tr></table>
</body>
</html>
i want the extracted element/value to be parsed inside the table of my actual html..
我希望在我的实际 html 的表格中解析提取的元素/值。
document.getElementById('test').innerHTML = the_extracted_elements_from_responseText
document.getElementById('test').innerHTML = the_extracted_elements_from_responseText
回答by Asad Saeeduddin
You need to use a DOMParseron the html and use DOM traversal methods on the resulting document to return the desired node(s).
您需要DOMParser在 html 上使用 a并在结果文档上使用 DOM 遍历方法以返回所需的节点。
var parser=new DOMParser();
var xmlDoc=parser.parseFromString(responseText,"text/xml");
var tds = xmlDoc.getElementsByTagName("td");
Note that IE would require new ActiveXObject("Microsoft.XMLDOM");instead.
请注意，IE 将需要new ActiveXObject("Microsoft.XMLDOM");。
