C# 使用 xpath 从 xml 文件中获取“值”

Question

I want to print the "value" Computer into my console.我想将“值” Computer打印到我的控制台中。 but I'm unable to find proper resources as I don't know the terminology that is needed to search, like nodes, child, values, ecc..但我无法找到合适的资源，因为我不知道搜索所需的术语，如节点、子节点、值、ecc..

My current code:我当前的代码：

XDocument xml = XDocument.Load(Localization);
XElement pattern = xml.XPathSelectElement("/resources/string[@key=\"Example\"]");

Xml: Xml：

<resources xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <string key="Example">Computer</string>
</resources>

What can I do to print that value?我该怎么做才能打印该值？

Answer 1

You are getting an XElement object from xml.XPathSelectElement() .您将从xml.XPathSelectElement()获得XElement object。 In The XElement class, there is a property called Value which will return the enclosing text (string) within an element.在XElement class 中，有一个名为Value的属性，它将返回元素内的封闭文本（字符串）。

The following code will print out what you desired:以下代码将打印出您想要的内容：

XDocument xml = XDocument.Load(Localization);
XElement pattern = xml.XPathSelectElement("/resources/string[@key=\"Example\"]");

Console.WriteLine(pattern.Value);

Console output:控制台 output：

Computer

Terminology术语

XML/HTML can be viewed as a tree of nodes (element) and children of nodes. XML/HTML 可以被视为节点（元素）和节点子节点的树。

Attribution: W3 Schools归因： W3 学校

Document is the parent of Root Element Document是Root Element
Root Element is a child of Document Root Element是Document的子元素
The ancestors of <head> are <html> and Document (think family tree) <head>的祖先是<html>和Document （想想家谱）
The descendants of Document are all the children nodes including nested children Document的后代是所有子节点，包括嵌套子节点
Siblings are nodes on the same level.兄弟姐妹是同一级别的节点。 For example, <head> is a sibling to <body>例如， <head>是<body>的兄弟

The XElement class allows you to traverse other nodes that are related to the current node. XElement class 允许您遍历与当前节点相关的其他节点。

XPath allows you to easily traverse the XML tree using a string. XPath 允许您使用字符串轻松遍历 XML 树。

XElement Documentation X元素文档

https://learn.microsoft.com/en-us/do.net/api/system.xml.linq.xelement?view.net-7.0 https://learn.microsoft.com/en-us/do.net/api/system.xml.linq.xelement?view.net-7.0

Answer 2

You do not need xpath with xml linq. Use a dictionary to get all key values你不需要xpath和xml linq。使用字典获取所有键值

           XDocument doc = XDocument.Load(FILENAME);
            Dictionary<string, string> dict = doc.Descendants("string")
                .GroupBy(x => (string)x.Attribute("key"), y => (string)y)
                .ToDictionary(x => x.Key, y => y.FirstOrDefault());

C# 使用 xpath 从 xml 文件中获取“值”

问题描述

2 个解决方案

解决方案1
2 已采纳 2022-10-06 16:33:12

Terminology术语

XElement Documentation X元素文档

解决方案2
0 2022-10-06 16:41:29

C# 使用 xpath 从 xml 文件中获取“值”

问题描述

2 个解决方案

解决方案1 2 已采纳 2022-10-06 16:33:12

Terminology术语

XElement Documentation X元素文档

解决方案2 0 2022-10-06 16:41:29

解决方案1
2 已采纳 2022-10-06 16:33:12

解决方案2
0 2022-10-06 16:41:29