How to get the processing instruction value using xpath - xlinq in C#?

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Hi All,
I have the task to display the processing-instruction values, I have tried to get the processing instruction values using XPath, XML values loaded in XDocument (XLINQ),
I am new to XLINQ, please help me.

What I have tried:

This is sample xml content

<?xml version="1.0" encoding="utf-8"?>
<document>
	<?fonts Times New Roman|Cambria Math|Symbol|Calibri|PMingLiU?>
	<body>
		<p>Para 1</p>
		<p>Para 2</p>
		<p>Para 3</p>
	</body>
</document>

I have tried below code for retrive the processing instruction content "fonts"

XProcessingInstruction pInsNode =(XProcessingInstruction) document.XPathSelectElement("processing-instruction('fonts')");

Posted 25-Dec-17 22:48pm

smksamy

Updated 26-Dec-17 2:58am

v2

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Nakhia_ind · Answer 1 · 2017-12-26T01:00:00

1- create a xml file and save in your debug folder or where your application start

<xml>
    <foo>
        <baz id="1">10</baz>
        <bar id="2" special="1">baa baa</bar>
        <baz id="3">20</baz>
        <bar id="4" />
        <bar id="5" />
    </foo>
    <foo id="123">Text 1<moo />Text 2
    </foo>
</xml>

Bellow is the code for retrive the data

string fpath = Application.StartupPath + "\\" + "test.xml";
           XDocument xele = XDocument.Load(fpath);

           var node = xele.XPathSelectElement("/xml/foo[@id='123']");
           var nodes = xele.XPathSelectElements(
           "//moo/ancestor::xml/descendant::baz[@id='1']/following-sibling::bar[not(@special='1')]");
           var sum = xele.XPathEvaluate("sum(//foo[not(moo)]/baz)");

Add the bellow name spaces in your page

using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;