appending to an xml file in c#

[GeX]

Hi.

using this as an example;

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
  <Document>
    <name>Paths</name>
    <description>Examples of paths. Note that the tessellate tag is by default
      set to 0. If you want to create tessellated lines, they must be authored
      (or edited) directly in KML.</description>
    <Style id="yellowLineGreenPoly">
      <LineStyle>
        <color>7f00ffff</color>
        <width>4</width>
      </LineStyle>
      <PolyStyle>
        <color>7f00ff00</color>
      </PolyStyle>
    </Style>
    <Placemark>
      <name>Absolute Extruded</name>
      <description>Transparent green wall with yellow outlines</description>
      <styleUrl>#yellowLineGreenPoly</styleUrl>
      <LineString>
        <extrude>1</extrude>
        <tessellate>1</tessellate>
        <altitudeMode>absolute</altitudeMode>
        <coordinates> -112.2550785337791,36.07954952145647,2357
          -112.2549277039738,36.08117083492122,2357
          -112.2552505069063,36.08260761307279,2357
          -112.2564540158376,36.08395660588506,2357
          -112.2580238976449,36.08511401044813,2357
          -112.2595218489022,36.08584355239394,2357
          -112.2608216347552,36.08612634548589,2357
          -112.262073428656,36.08626019085147,2357
          -112.2633204928495,36.08621519860091,2357
          -112.2644963846444,36.08627897945274,2357
          -112.2656969554589,36.08649599090644,2357 
        </coordinates>
      </LineString>
    </Placemark>
  </Document>
</kml>

how, using c# would you go about adding more coordinates to that list. I have been searching and pondering, and not really come up with much useful. I can add new elements etc, but not able to append to existing.

I may just be having a blonde moment mind.

 

[Dj_Jestar]

XmlDocument doc = new XmlDocument();
doc.LoadXml(theXmlAboveAsString); // use Load() instead for Stream or Reader
XmlNodeList nodes = doc.SelectNodes("/Document/Placemark/LineString/coordinates");
foreach (XmlNode node in nodes)
{
  node.InnerText.Append(yourNewCoordinateString);
}

or similar.. I don't have VS installed at the moment to actually check/test

 

[Goksly]

I would load it into an XmlDocument and add to it like (99% sure you can add elements etc) that followed by overwriting the file you loaded it from.
Might be an even slicker way with linq2xml however?

edit: No one likes a smart a55 jestar

 

[djkav]

You could use LINQ to query the XML tags. Generally you could just read in the value of <coordinates> to a local variable then append new data to it. then write it back to the attribute.

Any reason as to why all the coordinates are within the 1 tag. Would it not be more logical to have each coordinate seperate or in pairs, or threes?

 

[GeX]

thanks guys, it just didn't seem right in my head loading up the whole file just to append to it - and LINQ is a new thing to me. I'll look into that now.

Any reason as to why all the coordinates are within the 1 tag. Would it not be more logical to have each coordinate seperate or in pairs, or threes?

blame google, that's an example KML file.