(Delphi ActiveX) Swap JSON Objects

Demonstrates how to swap two JSON objects within a JSON document.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
json: TChilkatJsonObject;
index1: Integer;
index2: Integer;
jsonSara: TChilkatJsonObject;

begin
success := 0;

json := TChilkatJsonObject.Create(Self);
json.EmitCompact := 0;

// Load the following JSON:

// {
//   "petter": {
//     "DOB": "26/02/1986",
//     "gender": "male",
//     "country": "US"
//   },
//   "Sara": {
//     "DOB": "13/05/1982",
//     "gender": "female",
//     "country": "FR"
//   },
//   "Jon": {
//     "DOB": "19/03/1984",
//     "gender": "male",
//     "country": "UK"
//   }
// }

success := json.LoadFile('qa_data/json/people.json');
if (success = 0) then
  begin
    Memo1.Lines.Add(json.LastErrorText);
    Exit;
  end;

// Swap the positions of Jon and Sara.
index1 := json.IndexOf('Jon');
index2 := json.IndexOf('Sara');
json.Swap(index1,index2);

// We have this now:
Memo1.Lines.Add(json.Emit());

// {
//   "petter": {
//     "DOB": "26/02/1986",
//     "gender": "male",
//     "country": "US"
//   },
//   "Jon": {
//     "DOB": "19/03/1984",
//     "gender": "male",
//     "country": "UK"
//   },
//   "Sara": {
//     "DOB": "13/05/1982",
//     "gender": "female",
//     "country": "FR"
//   }
// }

// To swap an inner member:

jsonSara := TChilkatJsonObject.Create(Self);
json.ObjectOf2('Sara',jsonSara.ControlInterface);

index1 := jsonSara.IndexOf('DOB');
index2 := jsonSara.IndexOf('country');
jsonSara.Swap(index1,index2);

// We now have this:
Memo1.Lines.Add(json.Emit());

// {
//   "petter": {
//     "DOB": "26/02/1986",
//     "gender": "male",
//     "country": "US"
//   },
//   "Jon": {
//     "DOB": "19/03/1984",
//     "gender": "male",
//     "country": "UK"
//   },
//   "Sara": {
//     "country": "FR",
//     "gender": "female",
//     "DOB": "13/05/1982"
//   }
// }
end;