var imageNode = doc.DocumentNode.SelectSingleNode("//table[@id='tickerStats']/tbody/tr/td/img");
string imageText = imageNode.Attributes["src"].Value;
基本上只是抓取具有 id 的最近元素，然后沿着树走到你想要的位置。
或者，这也可以工作，并且看起来更干净一些（因为只要只有一张图像，您并不真正关心表本身中的 DOM 结构）：
var statsNode = doc.DocumentNode.SelectSingleNode("//table[@id='tickerStats']");
var imageNode = statsNode.SelectSingleNode(".//img");
string imageText = imageNode.Attributes["src"].Value;
Based on your URL this worked for me:
var imageNode = doc.DocumentNode.SelectSingleNode("//table[@id='tickerStats']/tbody/tr/td/img");
string imageText = imageNode.Attributes["src"].Value;
Basically just grabbing the closest element that has an id, then walking the tree down to where you want to be.
Alternatively this would work too and seems a little cleaner (since you don't really care about the DOM structure in the table itself as long as there is just one image):
var statsNode = doc.DocumentNode.SelectSingleNode("//table[@id='tickerStats']");
var imageNode = statsNode.SelectSingleNode(".//img");
string imageText = imageNode.Attributes["src"].Value;
This selects any attribute named src of any element named img that is a child of a td that is a child of a tr that is a child of a tbody that is a child of any table in the document, that has an id attribute with value 'tickerStats'.
If you need just the string value of this attribute (assuming the above XPath expression selects a single attribute node), use:
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根据你的 URL，这对我有用：
基本上只是抓取具有 id 的最近元素，然后沿着树走到你想要的位置。
或者，这也可以工作，并且看起来更干净一些（因为只要只有一张图像，您并不真正关心表本身中的 DOM 结构）：
Based on your URL this worked for me:
Basically just grabbing the closest element that has an id, then walking the tree down to where you want to be.
Alternatively this would work too and seems a little cleaner (since you don't really care about the DOM structure in the table itself as long as there is just one image):
使用：
选择名为
img的任何名为img的元素中名为src的任何属性，该元素是td的子元素。tr的子级，该tr是tbody的子级，而tbody又是文档中具有的任何属性，值为“tickerStats”。table的子级id如果您只需要此属性的字符串值（假设上面的 XPath 表达式选择单个属性节点），请使用：
Use:
This selects any attribute named
srcof any element namedimgthat is a child of atdthat is a child of atrthat is a child of atbodythat is a child of anytablein the document, that has anidattribute with value 'tickerStats'.If you need just the string value of this attribute (assuming the above XPath expression selects a single attribute node), use: