Solved

Need help with XPath

Posted on 2012-03-12
4
338 Views
Last Modified: 2012-03-12
I have an xml file with the following content
<Root>   
<Node>     
<SubEl1>abc</SubEl1>     
<SubEl2>def</SubEl2>     
<SubEl3>123</SubEl3>     
<SubEl4>456</SubEl4>         
</Node> 
<Node>     
<SubEl1>abc</SubEl1>     
<SubEl2>fgi</SubEl2>     
<SubEl3>124</SubEl3>     
<SubEl4>579</SubEl4>         
</Node> 
<Node>     
<SubEl1>ghi</SubEl1>     
<SubEl2>klm</SubEl2>     
<SubEl3>789</SubEl3>     
<SubEl4>012</SubEl4>         
</Node> 
</Root> 

Open in new window


I need to retrieve all the Node elements where SubEl1 has a value of "abc". Actually what I really need is a list of SubEl2 values for those Node elements.

I am having trouble writing XPath expression. Here is what I got so far:

XmlNodeList myList = xdoc.SelectNodes("Root/Node/SubEl1[text()='abc']");

Open in new window


but the above only give me a list of SubEl1, i.e. "abc", "abc",. while what I need is SubEl2, i.e. "def", "fgi"
0
Comment
Question by:YZlat
  • 3
4 Comments
 
LVL 60

Accepted Solution

by:
Geert Bormans earned 250 total points
ID: 37709762
XmlNodeList myList = xdoc.SelectNodes("Root/Node[SubEl1='abc']/SubEl2");
0
 
LVL 4

Expert Comment

by:MichaelStaszewski
ID: 37709763
You almost have it. Your expression should be...

Root/Node/SubEl1[text()='abc']/../SubEl2

Open in new window

0
 
LVL 60

Expert Comment

by:Geert Bormans
ID: 37709788
Michaels solution will work but is highly inefficient.
Why go down and back up if you don't need to?

Also (I should have made that comment earlier) it is never a good idea to test explicitely for a text() node. XPath can split a text content in multiple text() nodes, and then this would not work
I you want to drill down to the text level, you should do
SubEl1[.='abc']
or even better
SubEl1[normalize-space(.) ='abc']
0
 
LVL 60

Expert Comment

by:Geert Bormans
ID: 37709798
You can't delete a question that provided you with a good solution
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Where is this file? 3 33
Problem to Office 1 43
C# XML Get Values 4 34
Using sample Autorize.net c# simple example 1 26
I was working on a PowerPoint add-in the other day and a client asked me "can you implement a feature which processes a chart when it's pasted into a slide from another deck?". It got me wondering how to hook into built-in ribbon events in Office.
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question