(Delphi ActiveX) JSON Iterate Members

Demonstrates how to loop over the immediate members of a JSON object.

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
json: TChilkatJsonObject;
jsonStr: WideString;
success: Integer;
numMembers: Integer;
i: Integer;
name: WideString;
value: WideString;
iValue: Integer;

begin
json := TChilkatJsonObject.Create(Self);

jsonStr := '{ "id": 1, "name": "A green door", "tags": ["home", "green"], "price": 125 }';

success := json.Load(jsonStr);
if (success <> 1) then
  begin
    Memo1.Lines.Add(json.LastErrorText);
    Exit;
  end;

numMembers := json.Size;

for i := 0 to numMembers - 1 do
  begin

    name := json.NameAt(i);
    value := json.StringAt(i);

    Memo1.Lines.Add(name + ': ' + value);

    iValue := json.IntAt(i);
    Memo1.Lines.Add(name + ' as integer: ' + IntToStr(iValue));

  end;

// Note: The StringAt method returns the value as a string regardless of the type.
// If the value is a JSON array (such as for ["home", "green"]), then the JSON encoding
// of the entire array is returned.

// The IntAt method returns the value as an integer.  If the value does not convert to 
// an integer, then 0 is returned
end;