Delphi DLL

JSON Iterate Members

See more JSON Examples

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
json: HCkJsonObject;
jsonStr: PWideChar;
numMembers: Integer;
i: Integer;
name: PWideChar;
value: PWideChar;
iValue: Integer;

begin
success := False;

json := CkJsonObject_Create();

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

success := CkJsonObject_Load(json,jsonStr);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkJsonObject__lastErrorText(json));
    Exit;
  end;

numMembers := CkJsonObject_getSize(json);

for i := 0 to numMembers - 1 do
  begin

    name := CkJsonObject__nameAt(json,i);
    value := CkJsonObject__stringAt(json,i);

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

    iValue := CkJsonObject_IntAt(json,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

CkJsonObject_Dispose(json);

end;