c# - 使用C#从xml文件中获取值

Question

我是 xml 的新手，我不知道如何从下面的 xml 文件中读取/获取值:

<?xml version="1.0" encoding="utf-8" ?>
<Jeopardy>
  <category name = 'People in Computing'>
<first points = '100' answer = 'Alan Turing'>Known as the questioner of the human   mind, this man is known for helping tell humans and computers apart.</first>
<second points = '200' answer = 'Grace Hopper'>This female pioneer of the COBOL computer programming language was an Admiral in the US Navy.</second>
<third points = '300' answer = 'Tim Berners-Lee'>Called the father of the world wide web, this man is the director of the W3C.</third>
<fourth points = '400' answer = 'Lawrence Lessig'>An American academic and political activist who founded the Creative Commons, this man lobbies for reduced legal restrictions on copyrights and trademarks in the technology sector.</fourth>
<fifth points = '500' answer = 'Ada Lovelace'>This woman, known as the world's first computer programmer was also a Countess.</fifth>
  </category>
</Jeopardy>

抱歉，格式很糟糕，无法正确处理。

首先，我尝试在 XDocument 中加载此文件导致“无法将非空白添加到内容”异常，但如果加载到 XmlDocument 中则不会发生。

我尝试获取名称值的代码:

        string fileName = @"C:\Users\Kara\documents\visual studio 2010\Projects\Final Project\Final Project\Jeopardy.xml";

        XmlDocument doc = new XmlDocument();

        doc.Load(fileName);

        List<string> categories = new List<string>();

        XmlNodeList nList = doc.SelectNodes("/category/name");

        foreach (XmlNode node in nList)
        {
            categories.Add(node.ToString());
        }

遗憾的是，在调试 nList 时，计数为零，我无法弄清楚原因。我已经尝试查看此处已有的大量问题和其他地方的教程，但我感到很沮丧。我究竟如何从名称和其他节点中获取值？有人可以解释一下吗？也许为什么我在使用 XDocument 时会出现非空白区域错误？

Answer 1

doc.SelectNodes("/category/name")

您没有找到任何节点，因为 1) 第一个节点是 Jeopardy，而不是 category 和 2) name 是类别不是子元素。

尝试:doc.SelectNodes("/Jeopardy/category/@name")

像这样:

foreach (XmlNode node in nList) {
  categories.Add(node.Value);
}