通过 XmlDocument 按子节点选择父节点

本文关键字:选择 父节点 子节点 XmlDocument 通过 | 更新日期: 2023-09-27 18:34:03

请帮忙,我有 xml 文件,

<Users>
 <User FullName="" Name="sa">
  <userAvatarCache>-1</userAvatarCache>
  <description></description>
  <email></email>
  <phone></phone>
  <UserActive>true</UserActive>
 </User>
 <User FullName="asfgd" Name="stest">
  <userAvatarCache>-1</userAvatarCache>
  <description>aasad</description>
  <email>test@ukr.net</email>
  <phone>sdafdsfds0850</phone>
  <UserActive>true</UserActive>
 </User>
</Users>

我需要通过电子邮件选择全名。我得到了所有结构

 XmlDocument xmlDoc = new XmlDocument();
 xmlDoc.Load(res.GetResponseStream());
 XmlNode xmlNode = xmlDoc.DocumentElement.SelectSingleNode("User");

现在我只需要通过电子邮件发送 1 个结果(全名)。我怎样才能正确做?谢谢

通过 XmlDocument 按子节点选择父节点

请谷歌XPath,并尝试使用它。请注意,将 XmlDocument 用于大文件是一个非常糟糕的主意。

法典:

    var rawXml = @"<Users>
                 <User FullName="""" Name=""sa"">
                  <userAvatarCache>-1</userAvatarCache>
                  <description></description>
                  <email></email>
                  <phone></phone>
                  <UserActive>true</UserActive>
                 </User>
                 <User FullName=""asfgd"" Name=""stest"">
                  <userAvatarCache>-1</userAvatarCache>
                  <description>aasad</description>
                  <email>test@ukr.net</email>
                  <phone>sdafdsfds0850</phone>
                  <UserActive>true</UserActive>
                 </User>
                </Users>";
     XmlDocument xmlDoc = new XmlDocument();
     xmlDoc.LoadXml(rawXml);
     string email = "test@ukr.net";
     string selector = string.Format("User[email='"{0}'"]", email);
     XmlNode xmlNode = xmlDoc.DocumentElement.SelectSingleNode(selector);
     if(xmlNode != null)
     {      
        string fullName = xmlNode.Attributes["FullName"].Value;
        Console.WriteLine(fullName);
     }

XPath 根据子值选择元素很好地涵盖了这一点。

string xmlString = @"
 <Users>
  <User FullName='' Name='sa'>
   <userAvatarCache>-1</userAvatarCache>
   <description></description>
   <email></email>
   <phone></phone>
   <UserActive>true</UserActive>
  </User>
  <User FullName='asfgd' Name='stest'>
   <userAvatarCache>-1</userAvatarCache>
   <description>aasad</description>
   <email>test@ukr.net</email>
   <phone>sdafdsfds0850</phone>
   <UserActive>true</UserActive>
  </User>
 </Users>";
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlString);
XmlNode xmlNode = xmlDoc.DocumentElement.SelectSingleNode("./User[email = 'test@ukr.net']");