如何使用 XPATH 从 HTML 中查找属性

Question

我正在尝试从 html 检索文本，所以首先加载 html

HtmlWeb web = new HtmlWeb();
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc = web.Load(url);

此处要查找的文本是 0.802 并且直接在元素中并且有效为此 html

<tr>
  <th>Reported-Normalized Volume Ratio</th>
  <td>0.802</td>
</tr>

搜索字符串

var t5 = doc.DocumentNode.SelectSingleNode("//th[.='Reported-Normalized Volume Ratio']/following-sibling::td").InnerText;

t5 的值为预期的 0.802

现在我需要找到 data-price-btc="3535.5500891201248734"

<tr>
 <th style="width: 300px;">Reported Trading Volume</th>
  <td><div data-target="price.price" data-price-btc="3535.5500891201248734"> 
   </div></td>
</tr>

搜索字符串

var t1 = doc.DocumentNode.SelectSingleNode("//th[.='Reported Trading Volume']/following-sibling::td/div/@data-price-btc");

t1 是空的，我不明白为什么

Answer 1

问题是 HTML Agility Pack 不支持直接选择属性

https://html-agility-pack.net/knowledge-base/541953/selecting-attribute-values-with-html-agility-pack

如何使用 XPATH 从 HTML 中查找属性

How to find attribute from HTML using XPATH

html

xpath

html-agility-pack