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ValoChele
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21.8k
How to use Ancestors with Descendants in LINQ to XML?
Oct 16 2017 8:37 AM
How do I get the contents of a node <title> whose immediate ancestor is <sec> using linq 2 xml. Here is a sample xml file
<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
?>
<
article
article-type
=
"proceedings"
xmlns:xlink
=
"http://www.w3.org/1999/xlink"
xmlns:mml
=
"http://www.w3.org/1998/Math/MathML"
xmlns:oasis
=
"http://www.niso.org/standards/z39-96/ns/oasis-exchange/table"
>
<
front
>
<
title-group
>
<
title
>
SMALL angle scattering polarization biopsy: a comparative analysis of various skin diseases
</
title
>
</
title-group
>
....
....
</
front
>
<
body
>
<
boxed-text
id
=
"s1"
position
=
"anchor"
>
<
sidebar-label
>
S1.
</
sidebar-label
>
<
sec
id
=
"sec1"
>
<
title
>
EXPERIMENTAL TECHNIQUE
</
title
>
<
p
>
In the case of lupus the changes in the basal membrane adversely affect differentiation of the epidermis; this results in disorders of keratinization combined with progressive atrophy.
</
p
>
</
sec
>
</
boxed-text
>
....
....
</
body
>
I'm trying to get the value EXPERIMENTAL TECHNIQUE from the above example using both Descendants and Ancestors method of LINQ 2 XML. I've tried
var item=from x
in
doc.Descendants(
"label"
)
where x.Ancestors(
"sec"
)
select x;
but getting an error
Cannot implicitly convert type 'System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement>' to 'bool'
</b> whose immediate ancestor is <b><sec> </b>using linq 2 xml. Here is a sample xml file</div><div><div class="dp-highlighter"><div class="bar"></div><ol start="1" class="dp-xml"><li class="alt"><span><span class="tag"><?</span><span class="tag-name">xml</span><span> </span><span class="attribute">version</span><span>=</span><span class="attribute-value">"1.0"</span><span> </span><span class="attribute">encoding</span><span>=</span><span class="attribute-value">"UTF-8"</span><span class="tag">?></span><span> </span></span></li><li class=""><span><span class="tag"><</span><span class="tag-name">article</span><span> </span><span class="attribute">article-type</span><span>=</span><span class="attribute-value">"proceedings"</span><span> </span><span class="attribute">xmlns:xlink</span><span>=</span><span class="attribute-value">"http://www.w3.org/1999/xlink"</span><span> </span><span class="attribute">xmlns:mml</span><span>=</span><span class="attribute-value">"http://www.w3.org/1998/Math/MathML"</span><span> </span><span class="attribute">xmlns:oasis</span><span>=</span><span class="attribute-value">"http://www.niso.org/standards/z39-96/ns/oasis-exchange/table"</span><span class="tag">></span><span> </span></span></li><li class="alt"><span><span class="tag"><</span><span class="tag-name">front</span><span class="tag">></span><span> </span></span></li><li class=""><span><span class="tag"><</span><span class="tag-name">title-group</span><span class="tag">></span><span> </span></span></li><li class="alt"><span><span class="tag"><</span><span class="tag-name">title</span><span class="tag">></span><span>SMALL angle scattering polarization biopsy: a comparative analysis of various skin diseases</span><span class="tag"></</span><span class="tag-name">title</span><span class="tag">></span><span> </span></span></li><li class=""><span><span class="tag"></</span><span class="tag-name">title-group</span><span class="tag">></span><span> </span></span></li><li class="alt"><span>.... </span></li><li class=""><span>.... </span></li><li class="alt"><span><span class="tag"></</span><span class="tag-name">front</span><span class="tag">></span><span> </span></span></li><li class=""><span><span class="tag"><</span><span class="tag-name">body</span><span class="tag">></span><span> </span></span></li><li class="alt"><span><span class="tag"><boxed-text id="s1" position="anchor"></span></span></li><li class="alt"><span><span class="tag"><sidebar-label>S1.</<span style="background-color: #ffffff;">sidebar-label</span>></span></span></li><li class="alt"><span><span class="tag"><</span><span class="tag-name">sec</span><span> </span><span class="attribute">id</span><span>=</span><span class="attribute-value">"sec1"</span><span class="tag">></span><span> </span></span></li><li class=""><span><span class="tag"><</span><span class="tag-name">title</span><span class="tag">></span><span>EXPERIMENTAL TECHNIQUE</span><span class="tag"></</span><span class="tag-name">title</span><span class="tag">></span><span> </span></span></li><li class="alt"><span><span class="tag"><</span><span class="tag-name">p</span><span class="tag">></span><span>In the case of lupus the changes in the basal membrane adversely affect differentiation of the epidermis; this results in disorders of keratinization combined with progressive atrophy.</span><span class="tag"></</span><span class="tag-name">p</span><span class="tag">></span><span> </span></span></li><li class=""><span><span class="tag"></</span><span class="tag-name">sec</span><span class="tag">></span></span></li><li class=""><span><span><span style="background-color: #ffffff;"></boxed-text></span> </span></span></li><li class="alt"><span>.... </span></li><li class=""><span>.... </span></li><li class="alt"><span><span class="tag"></</span><span class="tag-name">body</span><span class="tag">></span><span> </span></span></li></ol></div>I'm trying to get the value <span style="margin: 0px; background-color: #f8f8f8; font-family: Consolas, "Courier New", Courier, mono, serif; font-size: 12px; color: red;">EXPERIMENTAL TECHNIQUE <span style="color: #000000;">from the above example using both Descendants and Ancestors method of LINQ 2 XML. I've tried</span></span></div><div><div class="dp-highlighter"><div class="bar"></div><ol start="1" class="dp-c"><li class="alt"><span><span>var item=from x </span><span class="keyword">in</span><span> doc.Descendants(</span><span class="string">"label"</span><span>) </span></span></li><li class=""><span> where x.Ancestors(<span class="string">"sec"</span><span>) </span></span></li><li class="alt"><span> select x; </span></li></ol></div>but getting an error</div><div><u> Cannot implicitly convert type 'System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement>' to 'bool'</u></div> <br id="-moz-br-"></body></html>
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