Solved

XmlDocument selectSinglenodes?

Posted on 2004-03-22
5
1,553 Views
Last Modified: 2007-12-19
how do i selectSinglenodes from an XmlDocument  without putting them into a XmlNode object?    in other words, i want to select single nodes into the same xmlDocument object ...

0
Comment
Question by:alain123
  • 3
  • 2
5 Comments
 
LVL 12

Expert Comment

by:esteban_felipe
Comment Utility
Hi alain123,

I think you are missing something here. It seems to me that you think than the XmlNode is an "orphan" node and not part of the xmldocument.

selectSingleNode will return the first matching node. You keep the reference to that node using an XMLNode instance. But it's a reference. Any changes that you apply to the node will reflect in the XMLDocument instance.

So you are not "putting" it in a XmlNode, you are referencing it using a Xmlnode.

Esteban Felipe
www.estebanf.com
0
 
LVL 1

Author Comment

by:alain123
Comment Utility
Hi Esteban how is it going, so on your answer... " So you are not "putting" it in a XmlNode, you are referencing "it" using a Xmlnode." ==> do you mean it's referencing the xmlDocument?  and if I pass this object as a parameter to another class, would the changes afect the original xmldoc?

thanks.
0
 
LVL 12

Expert Comment

by:esteban_felipe
Comment Utility
yes :)
0
 
LVL 12

Accepted Solution

by:
esteban_felipe earned 250 total points
Comment Utility
Check out this code:

using System;
using System.Xml;

namespace ConsoleApplication20
{
      class Class1
      {
            [STAThread]
            static void Main(string[] args)
            {
                  XmlDocument xmlDoc = new XmlDocument();
                  xmlDoc.Load(@"C:\XMLFile1.xml");
                  XmlNode node = xmlDoc.SelectSingleNode("test/node");
                  testMethod(node);
                  Console.WriteLine(xmlDoc.InnerXml);
                  Console.Read();
            }
            public static void testMethod(XmlNode currentNode)
            {
                  currentNode.Attributes["id"].Value = "100";
            }
      }
}


The original xml is:

<?xml version="1.0" encoding="utf-8" ?>
<test>
      <node id="1" date="2004-04-05T12:20:00">
            node 1
      </node>
      <node id="2" date="2004-01-12T12:20:00">
            node 2
      </node>
      <node id="3" date="2004-02-03T12:20:00">
            node 3
      </node>
      <node id="4" date="2004-03-10T12:20:00">
            node 4
      </node>
      <node id="5" date="2004-06-11T12:20:00">
            node 5
      </node>
      <node id="6" date="2004-06-01T12:20:00">
            node 6
      </node>
      <node id="7" date="2004-08-02T12:20:00">
            node 7
      </node>
      <node id="8" date="2004-10-04T12:20:00">
            node 8
      </node>
      <node id="9" date="2004-12-04T12:20:00">
            node 9
      </node>
      <node id="10" date="2004-01-04T12:20:00">
            node 10
      </node>
</test>

Compile it and check how it behaves.
0
 
LVL 1

Author Comment

by:alain123
Comment Utility
pretty nice example.. thank you.. i guess the xmldoc gets passed by value..
0

Featured Post

Threat Intelligence Starter Resources

Integrating threat intelligence can be challenging, and not all companies are ready. These resources can help you build awareness and prepare for defense.

Join & Write a Comment

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

743 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

Need Help in Real-Time?

Connect with top rated Experts

7 Experts available now in Live!

Get 1:1 Help Now