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2025-01-12 05:59 | 星期天

c# xpath节点操作

在C#中,可以使用System.XmlSystem.Xml.Linq命名空间中的类来执行XPath节点操作。这里将介绍使用System.Xml.Linq的示例。

首先,确保已安装以下命名空间:

using System.Xml;
using System.Xml.Linq;

接下来,通过以下步骤执行XPath节点操作:

  1. 加载XML文档:
string xmlContent = @"

    
        Book 1
        Author 1
    
    
        Book 2
        Author 2
    
";

XDocument xdoc = XDocument.Parse(xmlContent);
  1. 使用XPath查询节点:
XElement root = xdoc.Root;
XElement firstBook = root.XPathSelectElement("//book[1]");
XElement titleElement = firstBook.XPathSelectElement("title");
string title = titleElement.Value;

在这个示例中,我们首先加载了一个简单的XML文档。然后,我们使用XPath查询来选择第一个元素及其</code>子元素。最后,我们输出所选元素的值。</p> <p>更多XPath查询示例:</p> <ul> <li>选择所有<code><book></code>元素:<code>root.XPathSelectElements("//book")</code></li> <li>选择具有特定属性值的<code><book></code>元素:<code>root.XPathSelectElements("//book[@id='1']")</code></li> <li>选择所有<code><author></code>元素:<code>root.XPathSelectElements("//author")</code></li> </ul> <p>注意:<code>System.Xml.Linq.XDocument.XPathSelectElement()</code>方法返回第一个匹配的元素,而<code>XPathSelectElements()</code>方法返回一个包含所有匹配元素的<code>IEnumerable<XElement></code>集合。</p> </article> <div class="post-copyright">未经允许不得转载 » 本文链接:<a href="https://www.legongju.com/article/85945.html">https://www.legongju.com/article/85945.html</a></div> <div class="article-tags"> <a href="https://www.legongju.com/tag/3/" title="c">c</a></div> <nav class="article-nav"> <span class="article-nav-prev">上一篇<br><a href="https://www.legongju.com/article/85944.html" title="c# xpath常见用法">c# xpath常见用法</a></span> <span 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