Pascal (Lazarus/Delphi)

XML Sort by Content

See more XML Examples

Demonstrates the SortByContent method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSort2.xml, is this:

<root>
    <fruits>
        <apples>
            <apple>fuji</apple>
            <apple>gala</apple>
            <apple>granny smith</apple>
            <apple>honeycrisp</apple>
            <apple>mcintosh</apple>
        </apples>
        <fruit>banana</fruit>
        <fruit>blackberry</fruit>
        <fruit>blueberry</fruit>
        <fruit>orange</fruit>
        <fruit>pear</fruit>
    </fruits>
</root>

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Xml;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  xml: TXml;
  xSortRoot: TXml;
  bAscending: Boolean;

begin
  success := False;

  xml := TXml.Create;

  //  The sample input XML is available at http://www.chilkatsoft.com/data/fruitSort2.xml
  success := xml.LoadXmlFile('fruitSort2.xml');
  if (success <> True) then
    begin
      WriteLn(xml.LastErrorText);
      Exit;
    end;

  //  Sort the direct children under the "fruits" node by tag:
  xSortRoot := xml.FindChild('fruits');

  //  Sort in ascending order.
  bAscending := True;
  xSortRoot.SortByContent(bAscending);

  //  Show the result:
  WriteLn(xml.GetXml());

  //  Note:  The "apples" node contains child nodes, but its 
  //  text content is 0-length (empty).  Therefore, when sorting in
  //  ascending order, it will be positioned before the direct
  //  children containing non-empty content.

  //  <root>
  //      <fruits>
  //          <apples>
  //              <apple>granny smith</apple>
  //              <apple>gala</apple>
  //              <apple>fuji</apple>
  //              <apple>mcintosh</apple>
  //              <apple>honeycrisp</apple>
  //          </apples>
  //          <fruit>banana</fruit>
  //          <fruit>blackberry</fruit>
  //          <fruit>blueberry</fruit>
  //          <fruit>orange</fruit>
  //          <fruit>pear</fruit>
  //      </fruits>
  //  </root>

  //  Sort the direct children under the "apples" node:
  success := xSortRoot.FindChild2('apples');

  xSortRoot.SortByContent(bAscending);
  WriteLn(xml.GetXml());

  //  <root>
  //      <fruits>
  //          <apples>
  //              <apple>fuji</apple>
  //              <apple>gala</apple>
  //              <apple>granny smith</apple>
  //              <apple>honeycrisp</apple>
  //              <apple>mcintosh</apple>
  //          </apples>
  //          <fruit>banana</fruit>
  //          <fruit>blackberry</fruit>
  //          <fruit>blueberry</fruit>
  //          <fruit>orange</fruit>
  //          <fruit>pear</fruit>
  //      </fruits>
  //  </root>

  xSortRoot.Free;


  xml.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.