c# - xpath for foreach loop -


i have foreach loop parse html , using xpath it. need following

<p class="section">sectiontext1</p> <p class="subsection">subtext1</p> ----need in first loop <p class="subsection">subtext2</p>  ---need in first loop <p class="section">sectiontext2</p> <p class="subsection">subtext11</p> ---need in second loop <p class="subsection">subtext22</p>  ---- need in second loop <p class="section">sectiontext3</p>  foreach (htmlnode sectionnode in htmldocobject.documentnode.selectnodes("//p[@class='section']"))         {             count=count+2;             string text1 = sectionnode.innertext;              foreach (htmlnode subsectionnode in htmldocobject.documentnode.selectnodes("//p[@class='subsection'][following-sibling::p[@class='section'][1] , preceding-sibling::p[@class='section'][2]]"))             {                 string text = subsectionnode.innertext;             }          }

what trying loop through sections , find each subsections under specific section, processing , move next section find subsections under particular section.

i couldn't xpath work correctly since can't reference variables... can fix query linq.

foreach (var section in html.documentnode.selectnodes("//p[@class='section']")) {     console.writeline(section.innertext);     foreach (var subsection in section?.selectnodes("following-sibling::p")                                       ?.takewhile(n => n?.attributes["class"]?.value != "section")                                       ?? enumerable.empty<htmlnode>())         console.writeline("\t" + subsection.innertext); } /* sectiontext1         subtext1-1         subtext1-2 sectiontext2         subtext2-11         subtext2-22 sectiontext3 */

... if aren't using vs2015+ ...

foreach (var subsection in (section.selectnodes("following-sibling::p") ?? enumerable.empty<htmlnode>())                                    .takewhile(n => n.attributes["class"].value != "section"))

... same thing in xslt ...

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">   <xsl:output method="text" indent="yes"/>    <xsl:template  match="/">       <xsl:for-each select="//p[@class='section']">         <xsl:variable name="start" select="." />         <xsl:value-of select="text()"/><xsl:text>&#10;</xsl:text>         <xsl:for-each select="following-sibling::p[@class='subsection'][preceding-sibling::p[@class='section'][1]=$start]">             <xsl:text>&#9;</xsl:text><xsl:value-of select="text()"/><xsl:text>&#10;</xsl:text>         </xsl:for-each>       </xsl:for-each>   </xsl:template>  </xsl:stylesheet>

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