如何使用html agility pack和xpath获取所有子节点 [英] How to get all children nodes with html agility pack and xpath

问题描述

我有一个XML文档，我试图使用XPath解析HTML Agility Pack。这是我获取元素的代码

 HtmlDocument htmldoc =  new  HtmlDocument（）; 
 htmldoc.Load（fileName）; 
 HtmlNodeCollection nodes = htmldoc.DocumentNode.SelectNodes（  feed / l）; 

这是我的XML文档

 <？  xml     version   =  1.0   编码  =  UTF-8  ？ >  
 <   feed  >  
 <   tm  >  5701  <   / tm  >  
 <   tp  >  1141  <   / tp  >  
 <   pnr  >  1  <   / pnr  >  
 <   l     type   =  TEXT >  
 <   ca  >  
 <   c     id   =  21  >  JA <   / c  > ;  
 <   / ca  >  
 <   pts  >  
 <   pt     id   =  5  >  DO <   / pt  >  
 <   / pts  >  
 <   od  >  MA 99 <   / od  >  
 <   osd  >  2014-02-21 <   / osd  >  
 <   od  >  2014-02-22 <   / od  >  
 <   cu  >  url <   / cu  >  
 <   ip  >  ip <   / ip  >  
 <   ai  >  3184 <   / ai  >  
 <    >  com <   / an  >  
 <   n     id   =  1 < span class =code-keyword>>  US n <   / n  < span class =code-keyword>>  
 <   / l  >  
 <   l     type   =  TEXT >  
 <  < span class =code-leadattribute> ca  >  
 <   c     id   = <跨度class =code-keyword> 21 >  JA <   / c  >  
 <  < span class =code-leadattribute> / ca  >  
 <   pts  >  
 <   pt     id   =  5 >  DO <   / pt  >  
 <   / pts  >  
 < span class =code-keyword><   od  >  MA 99 <   / od  >  
 <   osd  >  2014-02-21 <   / osd  >  
  <   od  >  2014-02-22 <   / od  >  
 <   cu  >  url <   / cu  >  
 <   ip  >  ip <   / ip  >  
 <   ai  >  3184 <   / ai  >  
 <    >  com <   / an  >  
 <   n     id   =  1 >  US n &升t;   / n  >  
 <   / l  >  
 <   l     type   =  TEXT >  
 <   ca  >  
 <   c     id   =  21 < span class =code-keyword>>  JA <   / c  >  
 <   / ca  >  
 <   pts  > ;  
 <   pt     id   =  5 >  DO <   / pt  >  
 <   / pts  >  
 <   od  >  MA 99 <   / od  >  
 <   osd  >  2014-02-21 <   / osd  >  
 <   od  >  2014-02-22 <   / od  >  
 <   cu  >  url <   / cu  >  
 <   ip  >  ip <   / ip  >  
 <   ai  >  3184 <   / ai  >  
 <    >  com <   / an  >  
 <   n     id   =  1  >  US n <   / n  >  
 <   / l  >  
 <   l     type   =  TEXT >  
 <   ca  >  
 <   c     id   =  21 >  JA < ;   / c  >  
 <   / ca  >  
 <   pts  >  
 <   pt     id   =  5 >  DO < ;   / pt  >  
 <   / pts  >  
 <   od  >  MA 99 <   / od  >  
 <   osd  >  2014-02-21 <   / osd  >  
 < ;   od  >  2014-02-22 <   / od  >  
 <   cu  >  url <   / cu  >  
 <   ip  >  ip <   / ip  >  
 <   ai  >  3184 <   / ai  >  
 <    >  com <  < span class =code-leadattribute> / an  >  
 <   n     id   =  1 >  black US n <   / n  >  
 <   / l  >  
 
 <   / feed  >  

我试图得到所有l的子节点及其子节点，但我的xpath将节点带回l作为集合，但子节点为空。我正在寻找的节点按l是这些

 <   ca  >  
 <   c     id   =   21 >  JA <   / c  >  
  <   / ca  >  
 <   pts  >  
 <   pt     id < /跨度>  =  5 >  DO <   / pt  >  
 <   / pts  >  
 <   od  >  MA 99 <   / od  >  
 <   osd  >  2014-02-21 <   / osd  >  
 <   od  >  2014-02-22 <   / od  >  
 <   cu  >  url <   / cu  >  
 <   ip  >  ip <   / ip  >  
 <   ai  >  3184 <   / ai  >  
 <    >  com <   / an  >  
 <   n     id   =  1 >  black US n <   / n  >  

但是没有孩子。请帮助我的xpath似乎是正确的

解决方案

尝试使用

 htmldoc.DocumentNode.SelectNodes（// l）; 

I have an XML document i am trying to parse with HTML Agility Pack using XPath. This is my code for getting to the elements

HtmlDocument htmldoc = new HtmlDocument();
htmldoc.Load(fileName);
HtmlNodeCollection nodes = htmldoc.DocumentNode.SelectNodes("feed/l");

This is my XML document

<?xml version="1.0" encoding="UTF-8"?>
<feed>
<tm>5701</tm>
<tp>1141</tp>
<pnr>1</pnr>
<l type="TEXT">
<ca>
<c id="21">JA</c>
</ca>
<pts>
<pt id="5">DO</pt>
</pts>
<od>MA 99</od>
<osd>2014-02-21</osd>
<od>2014-02-22</od>
<cu>url</cu>
<ip>ip</ip>
<ai>3184</ai>
<an>com</an>
<n id="1">US n</n>
</l>
<l type="TEXT">
<ca>
<c id="21">JA</c>
</ca>
<pts>
<pt id="5">DO</pt>
</pts>
<od>MA 99</od>
<osd>2014-02-21</osd>
<od>2014-02-22</od>
<cu>url</cu>
<ip>ip</ip>
<ai>3184</ai>
<an>com</an>
<n id="1">US n</n>
</l>
<l type="TEXT">
<ca>
<c id="21">JA</c>
</ca>
<pts>
<pt id="5">DO</pt>
</pts>
<od>MA 99</od>
<osd>2014-02-21</osd>
<od>2014-02-22</od>
<cu>url</cu>
<ip>ip</ip>
<ai>3184</ai>
<an>com</an>
<n id="1">US n</n>
</l>
<l type="TEXT">
<ca>
<c id="21">JA</c>
</ca>
<pts>
<pt id="5">DO</pt>
</pts>
<od>MA 99</od>
<osd>2014-02-21</osd>
<od>2014-02-22</od>
<cu>url</cu>
<ip>ip</ip>
<ai>3184</ai>
<an>com</an>
<n id="1">black US n </n>
</l>

</feed>

I am trying to get all the node that are children of "l" and their children but my xpath brings nodes back with "l" as a collection but the children are null. the nodes i am looking for grouped by "l are these

<ca>
<c id="21">JA</c>
</ca>
<pts>
<pt id="5">DO</pt>
</pts>
<od>MA 99</od>
<osd>2014-02-21</osd>
<od>2014-02-22</od>
<cu>url</cu>
<ip>ip</ip>
<ai>3184</ai>
<an>com</an>
<n id="1">black US n </n>

but there are no children. Please help my xpath seems to be correct

解决方案

Try using

htmldoc.DocumentNode.SelectNodes("//l");

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