Delphi 7 - manipulate XML file using OmniXML library

Question

I have a big XML file, around 50 megs and I trying to use the OmniXML library to manipulate the XML document.

I didn't understand the demos in OmniXML...

The XML file have a structure like this:

<rollercoaster build="0.1 (Dec 30 2010)" debug="no">
    <settings name="roller coaster" sourcefile="rolcost.pas">
        <description>Roller Coaster admin function</description>
        <year>2010</year>
        <manufacturer>ArtTeck</manufacturer>
            <sears name="sears.uk" size="1024"  mda="87117ba5082cd7a615b4ec7c02dd819" region="england" set1="25d"/>
    <sears name="sears.dk" size="1056"  mda="326dbbf94c6fa2e96613dedb53702f8" region="denmark" set1="25d"/>
    <sears name="sears.gr" size="6802"  mda="01b4c38108d9dc4e48da4f8d5821377" region="greece" set1="65d"/>
    </settings>
    <settings name="roller coaster2" sourcefile="rolcost2.pas">
        <description>Roller Coaster user function</description>
        <year>2010</year>
        <manufacturer>ArtTeck</manufacturer>
    </settings>...... and goes on
</rollercoaster>

The things I want to know are:

• How to make the loop display the nodes and child nodes in a StringGrid.
• How can I get the data from a single node (for debug purposes).
• How can I select he child node of the settings node?
• How can I take the list of the same node and how to separate the node "sears"...?

Answer 1

uses
  OmniXML,
  OmniXMLUtils;

procedure TForm28.FormCreate(Sender: TObject);
var
  descNode: IXMLNode;
  iNode   : integer;
  node    : IXMLNode;
  nodeList: IXMLNodeList;
  xml     : IXMLDocument;
begin
  xml := CreateXMLDoc;
  if XMLLoadFromFile(xml, 'c:\0\roller.xml') then begin
    // node enumeration in D2005+
    //for node in XMLEnumNodes(xml, '/rollercoaster/settings') do
    //  lbLog.Items.Add(GetNodeTextStr(node, 'description'));
    // node enumeration in D7 and older
    nodeList := xml.SelectNodes('/rollercoaster/settings');
    for iNode := 0 to nodeList.Length - 1 do begin
      node := nodeList.Item[iNode];
      lbLog.Items.Add(GetNodeTextStr(node, 'description'));
    end;
    // selecting a single node with specified attribute name
    node := xml.SelectSingleNode('/rollercoaster/settings[@name="roller coaster2"]');
    // accessing subnode text
    lbLog.Items.Add(GetNodeTextStr(node, 'description'));
    // accessing subnode text, alternative way
    descNode := node.SelectSingleNode('description');
    lbLog.Items.Add(GetNodeText(descNode));
    // accessing node attribute
    lbLog.Items.Add(GetNodeAttrStr(node, 'sourcefile'));
  end;
end;