HtmlAgilityPack 选择子节点值

Question

HTML 字符串包含确切的字符串

<div class="XKa d-k-l"><span class="VTb d-k-l"></span></div><div class="pha d-k-l"><div ><div>Hello World </div>

我想从 div 中检索 Hello World。

我正在使用HtmlAgilityPack

var item = 
     HTMLContent.DocumentNode
                .SelectSingleNode("//div[@class='XKa d-k-l']//span[@class='VTb d-k-l']//div[@class='pha d-k-l']")
                .InnerHtml;

异常：对象引用未设置为对象的实例。无法弄清楚正确的语法感谢您的帮助

Answer 1

div[@class='pha d-k-l'] 不是div[@class='XKa d-k-l'] 的后代，关系是siblings 而不是ancestor-descendant。您可以尝试像这样使用following-sibling 轴：

//div[@class='XKa d-k-l']/following-sibling::div[@class='pha d-k-l']

working demo example：

var html = @"<div class='XKa d-k-l'><span class='VTb d-k-l'></span></div><div class='pha d-k-l'><div><div>Hello World </div></div></div>";
var HTMLContent = new HtmlDocument();
HTMLContent.LoadHtml(html);
var item = HTMLContent.DocumentNode
            .SelectSingleNode("//div[@class='XKa d-k-l']/following-sibling::div[@class='pha d-k-l']").InnerHtml;
Console.WriteLine(item);

输出：

<div><div>Hello World </div></div>

更新：

您可以像这样添加span 检查：

//div[@class='XKa d-k-l'][span/@class='VTb d-k-l']/following-sibling::div[@class='pha d-k-l']