(Delphi DLL) XML Sort by Content

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>

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX 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
xml: HCkXml;
xSortRoot: HCkXml;
success: Boolean;
bAscending: Boolean;

begin
xml := CkXml_Create();

// The sample input XML is available at http://www.chilkatsoft.com/data/fruitSort2.xml
success := CkXml_LoadXmlFile(xml,'fruitSort2.xml');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkXml__lastErrorText(xml));
    Exit;
  end;

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

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

// Show the result:
Memo1.Lines.Add(CkXml__getXml(xml));

// 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 := CkXml_FindChild2(xSortRoot,'apples');

CkXml_SortByContent(xSortRoot,bAscending);
Memo1.Lines.Add(CkXml__getXml(xml));

// <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>

CkXml_Dispose(xSortRoot);

CkXml_Dispose(xml);

end;