我有以下Questions.xml文件
<?xml version="1.0" encoding="utf-8" ?>
<Questions>
<Question>
<Subject>ADO.NET</Subject>
<Text>Which class should you use to manage multiple tables and relationships among them?</Text>
<Answers>
<Answer>DataRow</Answer>
<Answer>DataView</Answer>
<Answer>DataTable</Answer>
<Answer>DataSet</Answer>
</Answers>
</Question>
</Questions>
我要解析。以下是我的课程和我的问题。
public class Question
{
public string Text { get; set; }
public string Subject { get; set; }
public virtual List<Answer> Answers { get; set; }
}
public class Answer
{
public string Text { get; set; }
}
static void readQuestions()
{
var questions = from question in XDocument.Load("Questions.xml").Descendants("Questions").Elements("Question")
select new Question
{
Subject = (string)question.Element("Subject"),
Text = (string)question.Element("Text"),
Answers = new List<Answer>(
from answers in question.Elements("Answers").Elements("Answer")
select new Answer
{
Text = (string)answers.Element("Answer")
})
};
foreach (var question in questions)
{
Console.WriteLine("Subject: {0}\n Text: {1}", question.Subject, question.Text);
foreach (var answer in question.Answers)
Console.WriteLine("Answer: {0}", answer.Text);
}
}
问题是它没有为答案打印文本。我搜索了不同的嵌套linq到xml查询示例,但我找不到我的错误。非常感谢。
答案 0 :(得分:4)
只需改变一下:
XDocument.Load("Questions.xml").Descendants("Questions").Elements("Question")
要:
XDocument.Load("Questions.xml").Descendants("Question")
或者:
XDocument.Load("Questions.xml").Root.Elements("Question")
同时更改您的答案查询:
from answers in question.Element("Answers").Elements("Answer")
select new Answer
{
Text = (string)answers
})