使用HTML Agility Pack在HtmlNodeCollection中选择节点

Question

我有这样的html结构：

<div class="class1">
    <div class="class2">
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    </div>
    <div class="class2">
    </div>
    <div class="class2">
    </div>
    <div class="class2">
    </div>
</div>
<div class="class1">
    <div class="class2">
        <a href="test" title="professional and enthusiast programmers">Stack Overflow</a>
    </div>
</div>

我试图用class1选择所有节点：

HtmlNodeCollection nodes = doc.DocumentNode.SelectNodes("//*[contains(@class,' class1 ')]");

并选择该节点内包含class2的所有节点：

foreach (HtmlNode node in nodes)
{
   HtmlNodeCollection nodes2 = node.SelectNodes("//*[contains(@class,' class2 ')]");
}

但nodes2从所有节点获取class2。我做错了什么？

Answer 1

var nodes = doc.DocumentNode.SelectNodes("//div[@class='class1']");

var nodes2 = nodes.Select(c1 => c1.SelectNodes("div[@class='class2']"));

Answer 2

替代XPath为我工作

var nodes = doc.DocumentNode.SelectNodes("//div[@class='class1']");
var nodes2 = nodes.Select(c1 => c1.SelectNodes(".//div[@class='class2']"));