随机选择名称相同的XML节点

本文关键字：XML 节点 选择 随机 | 更新日期: 2023-09-27 18:11:03

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面xml文件中指定的问题之一时，程序从节点中随机选择一个答案。例如，当用户在文本框中输入"你最喜欢的编程语言是什么?"程序必须生成PHP, c#，Java或VB。随机净。

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:

蓝色红色的绿色黄色的PHPc#JavaVB。净

请帮。

随机选择名称相同的XML节点

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);
        }
    }
}

使用Linq To Xml，

Random rnd = new Random();
var xDoc = XDocument.Load("QA.xml");
var question = xDoc.Descendants("QA")
                   .First(d => d.Element("question").Value == txtQ.Text);
var answer = question.Elements()
                     .Skip(rnd.Next(0, question.Elements().Count()))
                     .First().Value;
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