Delphi DLL

Iterate over Direct Children with a Specific Tag

See more XML Examples

Demonstrates how to iterate over direct children having a specific tag.

The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
xml: HCkXml;
child: HCkXml;
numWithTag: Integer;
i: Integer;

begin
success := False;

xml := CkXml_Create();

// The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
success := CkXml_LoadXmlFile(xml,'fruit.xml');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkXml__lastErrorText(xml));
    Exit;
  end;

//  Get the number of direct children having the tag "fruit"
numWithTag := CkXml_NumChildrenHavingTag(xml,'fruit');

if (numWithTag > 0) then
  begin

    for i := 0 to numWithTag - 1 do
      begin
        child := CkXml_GetNthChildWithTag(xml,'fruit',i);
        Memo1.Lines.Add(IntToStr(i) + ': ' + CkXml__tag(child) + ' : ' + CkXml__content(child));
        CkXml_Dispose(child);
      end;

    Memo1.Lines.Add('-----');

    // Do the same as the above loop, but instead of creating
    // a new object instance for each child, call GetNthChildWithTag2 to
    // update the object's reference instead.
    for i := 0 to numWithTag - 1 do
      begin
        // Navigate to the Nth child.  
        success := CkXml_GetNthChildWithTag2(xml,'fruit',i);
        Memo1.Lines.Add(IntToStr(i) + ': ' + CkXml__tag(xml) + ' : ' + CkXml__content(xml));
        // Navigate back up to the parent:
        success := CkXml_GetParent2(xml);
      end;

    Memo1.Lines.Add('-----');
  end;

CkXml_Dispose(xml);

end;