Problems accessing certain node reading xml with C#

Question

My XML looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <something.logger>
    <add key="LoggerId" value="8a2ff9ef-d144-4dcb-86d8-6ccaf44def20">
    </add>
    <add key="FederationId" value="00000000-0000-0000-0000-000000000000" />
  </something.logger>
 </configuration>

My code:

XmlDocument xml = new XmlDocument();
xml.Load(Some-Valid-Path);
XmlNodeList xnList = xml.SelectNodes("/configuration/something.logger");

I am trying to get the Guid (or value..) of value.

In the end i want to get the string "8a2ff9ef-d144-4dcb-86d8-6ccaf44def20"

Thanks !

possible duplicate of How to extract attribute’s value through XPath — nvoigt
– nvoigt, Commented Aug 5, 2014 at 14:14

har07 · Accepted Answer · 2014-08-05 14:35:37Z

1

Use @ at the beginning of attribute name to reference an attribute in XPath. Then you need to cast each item in list as XmlAttribute :

XmlNodeList xnList = doc.SelectNodes("/configuration/something.logger/add[@key='LoggerId']/@value");
foreach (XmlAttribute n in xnList)
{
    Console.WriteLine(n.Value);
}

edited Aug 5, 2014 at 14:35

answered Aug 5, 2014 at 14:21

har07

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3 Comments

ilansch Over a year ago

What condition should i add in order to retrieve only LoggerId value ? Sorry for being noobish - I Mean where key=LoggerId -> i need only that string. the n returned in your sample is only value - since thats what written in "configuration/something.logger/add/@value"

har07 Over a year ago

Edited my answer to accommodate that

ilansch Over a year ago

Hi man thanks alot i just seen, i took your sample and then started to create XmlElement from each Selected Node, and then browsing on each XmlElement attributes to find the LoggerId, your solution is faster. using the xpath with addition of [@key='LoggerId']

Kabulan0lak · Accepted Answer · 2014-08-05 14:19:55Z

1

Use /@ to access attributes:

XmlNodeList xnList = xml.SelectNodes("/configuration/something.logger/add/@value");

answered Aug 5, 2014 at 14:19

Kabulan0lak

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