C# 通过XMLReader从XML文件收集属性
我有一个XML文件,如下所示C# 通过XMLReader从XML文件收集属性,c#,xml,xml-parsing,C#,Xml,Xml Parsing,我有一个XML文件,如下所示 <BOOK bnumber="1" bname="Book"> <CHAPTER cnumber="1"> <Sentence vnumber="1">This is the sentence 1.</Sentence> <Sentence vnumber="2">This is the sentence 2.</Sentence> <Se
<BOOK bnumber="1" bname="Book">
<CHAPTER cnumber="1">
<Sentence vnumber="1">This is the sentence 1.</Sentence>
<Sentence vnumber="2">This is the sentence 2.</Sentence>
<Sentence vnumber="3">This is the sentence 3.</Sentence>
</CHAPTER>
<CHAPTER cnumber="2">
<Sentence vnumber="1">Hello World 1.</Sentence>
<Sentence vnumber="2">Hello World 2.</Sentence>
<Sentence vnumber="3">Hello World 3.</Sentence>
<Sentence vnumber="4">Hello World 4.</Sentence>
</CHAPTER>
<CHAPTER cnumber="3">
<Sentence vnumber="1">Good morning 1.</Sentence>
<Sentence vnumber="2">Good morning 2.</Sentence>
<Sentence vnumber="3">Good morning 3.</Sentence>
</CHAPTER>
</BOOK>
现在我用传统的方法,
XmlDocument xdoc = new XmlDocument();
xdoc.Load(@"C:\books.xml"); //load the xml file into our document
XmlNodeList nodes = xdoc.SelectNodes(@"//BOOK/CHAPTER[@cnumber='" + chap
string sentences = "";
foreach(XmlNode node in nodes) {
sentences += node.InnerText + "; ";
}
但是我想使用XMLReader,因为XML文件很大,我不想把它加载到内存中
谢谢你的帮助。基本上你可以这样做:
var chapters = new List<string>();
using (XmlReader reader = XmlReader.Create(new StringReader(xmlString)))
{
reader.ReadToFollowing("CHAPTER");
reader.MoveToFirstAttribute();
string chapterNumber = reader.Value;
chapters.Add("Chapter " + chapterNumber);
}
var chapters=新列表();
使用(XmlReader=XmlReader.Create(新StringReader(xmlString)))
{
读者。阅读如下(“章节”);
reader.MoveToFirstAttribute();
字符串chapterNumber=reader.Value;
章节。添加(“章节”+章节编号);
}
其中xmlString是您的xml
这将找到第一章并从中获取属性,然后将其添加到章节列表中。您是否尝试过在
XMLReader
上编写代码?还没有,我对此不太在行。xmlString是我的xml,但它很大。比如说20MB。我们可以这样做吗?XmlReader.Create
还有一个重载,可以接受任何流
对象。这就是你想要做的。创建一个从XML源读取的流,然后将该流传递给Create
方法,而不是新的StringReader
(例如XmlReader.Create(myStream)
)。我的意思是xmlString在这里引用整个XML文件吗?
var chapters = new List<string>();
using (XmlReader reader = XmlReader.Create(new StringReader(xmlString)))
{
reader.ReadToFollowing("CHAPTER");
reader.MoveToFirstAttribute();
string chapterNumber = reader.Value;
chapters.Add("Chapter " + chapterNumber);
}