C#-APP: Reading Garmin GPX File

[Skywave]

Hi All

Firstly: I have searched everywhere! I couldn't find anything!
Secondly: I am VERY new (1 and a half days) to C#, but I have been doing VB6 and VB.Net for years now. I want to learn C# !

Now that I have that out of the way...

I want to write an application that will open multiple Garmin GPX files and display them in a tree view (The filename being the Text, with 2 sub-nodes), so that I can drag waypoints from one file to another.

The problem is that I have no idea how to read the GPX (XML Format) in such a way that I will be able to save the files again, with the dragged waypoints in the new files.

Below I have a small sample of the GPX file, as well as the code that I currently use.

The GPX File

<?xml version="1.0" encoding="UTF-8" standalone="no" ?> 
<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="MapSource 6.11.6" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
    <metadata>
        <link href="http://www.garmin.com">
            <text>Garmin International</text> 
        </link>
        <time>2007-08-13T16:22:39Z</time> 
        <bounds maxlat="-26.264876" maxlon="28.141640" minlat="-34.057666" minlon="23.375585" /> 
    </metadata>
    <wpt lat="-26.264876" lon="28.141640">
        <time>2007-07-31T09:53:54Z</time> 
        <name>FC149 40km M94E</name> 
        <cmt>M94 Kritzinger Rd eastwards 40kph</cmt> 
        <desc>M94 Kritzinger Rd eastwards 40kph</desc> 
        <sym>Scenic Area</sym> 
        <extensions>
            <gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensions/v3/GpxExtensionsv3.xsd">
            <gpxx:Proximity>250.000000</gpxx:Proximity> 
            <gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode> 
            </gpxx:WaypointExtension>
        </extensions>
    </wpt>
    <wpt lat="-34.057666" lon="23.375585">
        <time>2007-05-18T18:02:29Z</time> 
        <name>FC355 40km Strand Str</name> 
        <cmt>Strand Str Plettenburg Bay 40kph (yes! 40)</cmt> 
        <desc>Strand Str Plettenburg Bay 40kph (yes! 40)</desc> 
        <sym>Scenic Area</sym> 
        <extensions>
            <gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensions/v3/GpxExtensionsv3.xsd">
            <gpxx:Proximity>250.000000</gpxx:Proximity> 
            <gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode> 
            </gpxx:WaypointExtension>
        </extensions>
    </wpt>
</gpx>
 

The C# Code

        private bool AddGPXFile(FileInfo File)
        {
            Node[] pNode; int N;
            int I; int X; int Y; int Q;
            string Last;
            TreeNode TN;
            string Header; string Footer; string MetaData;
            string Contents;
            XmlDocument XD = new XmlDocument();
            XD.Load(File.FullName);
            for (I = 0; I < XD.ChildNodes.Count ; I++){
                //MessageBox.Show(XD.ChildNodes.Item(I).Name);
                if (XD.ChildNodes.Item(I).Name.ToUpper() == "GPX")
                {
                    for (X = 0; X < XD.ChildNodes.Item(I).ChildNodes.Count; X++)
                    {
                        if (XD.ChildNodes.Item(I).ChildNodes.Item(X).Name.ToUpper() == "WPT")
                        {
                            for (Y = 0; Y < XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Count; Y++) 
                            {
                                //MessageBox.Show(XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).Name + " - " + XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).ChildNodes.Count);
                                Last = XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).Name + " - " + XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).ChildNodes.Count;
                                if (Last.ToUpper().StartsWith("EXTENSION"))
                                {
                                    for (Q = 0; Q < XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).ChildNodes.Count; Q++)
                                    {
                                        MessageBox.Show(XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).ChildNodes.Item(Q).OuterXml);
                                        //MessageBox.Show(Last + ": " + XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).ChildNodes.Item(Q).Name + " :: " + XD.ChildNodes.Item(I).ChildNodes.Item(X).ChildNodes.Item(Y).ChildNodes.Item(Q).NodeType.ToString());
                                    }
                                }
                            }
                        }
                    }
                }
            }
 
            TN = this.trvFiles.Nodes.Add(File.Name);
            TN.Tag = XD;
            TN.Nodes.Add("Original: ");
            TN.Nodes.Add("Added: ");
            TN.Expand();
            return true;
        }
 

I know for a fact that this cannot be the best way for reading an XML file, so if someone would point me in the right direction (excuse the pun), it would be greatly appreciated.

Thanx