c# - 随机选择具有相同名称的 XML 节点

Question

我有这个 XML 文件:

<Main>
<QA>
    <question>What is your favorite color?</question>
    <!--pick random!-->
    <answer>Blue</answer>
    <answer>Red</answer>
    <answer>Green</answer>
    <answer>Yellow</answer>
</QA>

<QA>
    <question>What is your favorite programming language?</question>
    <!--pick random!-->
    <answer>PHP</answer>
    <answer>C#</answer>
    <answer>Java</answer>
    <answer>VB.Net</answer>
</QA>

我希望当用户输入上述 xml 文件中指定的问题之一时，程序会从节点中随机选择一个答案。例如，当用户输入“你最喜欢的编程语言是什么？”时在文本框中，程序必须随机生成PHP、C#、Java或VB.Net。

这是我的代码，但不正确:

XmlDocument xml = new XmlDocument();
xml.Load("QA.xml");

XmlNodeList xList = xml.SelectNodes("Main/QA");
foreach (XmlNode xn in xList)
{
    string Question = xn["question"].InnerText;
    if (Question == txtQuestion.Text)
    {
        XmlNodeList answerlist = xml.SelectNodes("Main/QA/answer");
        foreach (XmlNode ans in answerlist)
        {
            Console.WriteLine(ans.InnerText);
        }
    }
}  

输出:

蓝色红色的绿色的黄色的PHPC# java VB.Net

请帮忙。

Answer 1

试试这个:

XmlDocument xml = new XmlDocument();
xml.Load("QA.xml");

XmlNodeList xList = xml.SelectNodes("Main/QA");
foreach (XmlNode xn in xList)
{
    string Question = xn["question"].InnerText;
    if (Question == txtQuestion.Text)
    {
        XmlNodeList answerlist = xn.SelectNodes("./answer");
        foreach (XmlNode ans in answerlist
            .Cast<XmlNode>()
            .OrderBy(elem => Guid.NewGuid()))
        {
            Console.WriteLine(ans.InnerText);
        }
    }
}