[Mono-list] Xml reading & writing.

Jonathan Pryor jonpryor at vt.edu
Thu Sep 18 09:54:43 EDT 2008

On Wed, 2008-09-17 at 22:36 +0100, Neil Munro wrote:

> So I have this:
> // Save it in the prefs.xml file.
> XmlDocument xmlDoc = new XmlDocument( );
> xmlDoc.Load( sPath_To_Prefs_File ); 
> Now I know that the whole document is loaded into memory at this
> point, how would i traverse the document in memory to get to the
> <UpdateSource> section, read until there are no more of that tag and
> add a new update source after the last one and before the next line?

Read the documentation I pointed you to. :-)

To see if the UpdateSource element is present, you could learn XPath and

        XmlNode updateSource = 
        if (updateSource == null) {
            // add updateSource
            XmlNode parent = xmlDoc.SelectSingleNode("/path/to");
            updateSource = xmlDoc.CreateElement ("UpdateSource");
            // fill updateSource with nested elements, attributes, etc.
            parent.AppendChild (updateSource);

The above likely won't be perfect, but should be enough to get you

Again, read the documentation.  It's full of examples.

 - Jon

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