Delphi 7-使用OmniXML库操作XML文件

Question

我有一个很大的XML文件，大约50 megs，我试图使用OmniXML库来操作XML文档。

我不明白OmniXML里的演示..。

XML文件具有如下结构：

<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>

我想知道的是：

• 如何使循环显示StringGrid中的节点和子节点。
• 如何从单个节点获取数据(用于调试目的)。
• 如何选择设置节点的子节点？
• 如何获取同一节点的列表，以及如何将节点“西尔斯”.分开？

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;