c# - Xpath/C#，从多个 namespace 获取数据

Question

因此，在下面使用此代码示例的XML中，我可以从XML成功获取每个条目的HomeAddress和Name信息。如果我还需要从每个条目中获取ID（驾驶执照号码xxx）信息，该怎么办？

编辑：更新了XML示例以进行澄清

代码示例：

XmlDocument xDoc = new XmlDocument();
        xDoc.LoadXml(responseFromServer);
        XmlNamespaceManager xnsmgr = new XmlNamespaceManager(xDoc.NameTable);
        xnsmgr.AddNamespace("ns1", "http://www.w3.org/2005/Atom");
        xnsmgr.AddNamespace("ns2", "http://strange.com/ns/1.0/");
        XmlNodeList xnlInsuredListMembers = xDoc.SelectNodes("//ns2:InsuredListMember", xnsmgr);
        foreach (XmlNode xnMember in xnlInsuredListMembers)
        {
            XmlNode xnHomeAddress = xnMember.SelectSingleNode("ns2:HomeAddress", xnsmgr);
            string sHomeAddress = xnHomeAddress.InnerText;

            XmlNode xnName = xnMember.SelectSingleNode("ns2:Name", xnsmgr);
            string sName = xnName.InnerText;

            MessageBox.Show(sHomeAddress + sName);
        }

XML样本

<?xml version="1.0" encoding="UTF-8"?>
    <feed xmlns="http://www.w3.org/2005/Atom">
      <id>someID</id>
      <title type="text">Title</title>
      <author>
        <name>XML Author</name>
      </author>
      <updated>2010-10-25T20:05:30.267Z</updated>
      <link href="currentURL"></link>
      <link href="nextURL"></link>
      <entry>
        <id>Drivers License Numberxxx</id>
        <content type="application/vnd.ctct+xml">
          <InsuredListMember xmlns="http://strange.com/ns/1.0/">
            <HomeAddress>123 anystreet</HomeAddress>
            <Name>doe, somegal</Name>
          </InsuredListMember>
        </content>
      </entry>
      <entry>
        <id>Drivers License Numberxxx</id>
        <content type="application/vnd.ctct+xml">
          <InsuredListMember xmlns="http://strange.com/ns/1.0/">
            <HomeAddress>321 anystreet</HomeAddress>
            <Name>doe, someguy</Name>
          </InsuredListMember>
        </content>
      </entry>
    </feed>

Answer 1

首先，根据您的输入样本，该//ns2:ContactListMember应该为//ns2:InsuredListMember。

其次，如果上下文节点是某个ns2:InsuredListMember，则通过以下表达式选择id属性：@id。

如果希望给定的ns1:id为ns1:entry的ns2:InsuredListMember子级，请使用以下XPath表达式：../../ns1:id