Delphi ActiveX

Create more Complex JSON Document

See more JSON Examples

Sample code to create the following JSON document:

    {  
        "Title": "The Cuckoo's Calling",  
        "Author": "Robert Galbraith",  
        "Genre": "classic crime novel",  
        "Detail": {  
            "Publisher": "Little Brown",  
            "Publication_Year": 2013,  
            "ISBN-13": 9781408704004,  
            "Language": "English",  
            "Pages": 494  
        },  
        "Price": [  
            {  
                "type": "Hardcover",  
                "price": 16.65  
            },  
            {  
                "type": "Kindle Edition",  
                "price": 7.00  
            }  
        ]  
    }  

Delphi ActiveX

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;
index: Integer;
detail: TChilkatJsonObject;
aPrice: TChilkatJsonArray;
priceObj: TChilkatJsonObject;

begin
success := 0;

json := TChilkatJsonObject.Create(Self);

// The only reason for failure in the following lines of code would be an out-of-memory condition..

// An index value of -1 is used to append at the end.
index := -1;

success := json.AddStringAt(-1,'Title','The Cuckoo''s Calling');
success := json.AddStringAt(-1,'Author','Robert Galbraith');
success := json.AddStringAt(-1,'Genre','classic crime novel');

// Let's create the Detail JSON object:
detail := TChilkatJsonObject.Create(Self);
json.AppendObject2('Detail',detail.ControlInterface);

success := detail.AddStringAt(-1,'Publisher','Little Brown');
success := detail.AddIntAt(-1,'Publication_Year',2013);
success := detail.AddNumberAt(-1,'ISBN-13','9781408704004');
success := detail.AddStringAt(-1,'Language','English');
success := detail.AddIntAt(-1,'Pages',494);

// Add the array for Price
aPrice := TChilkatJsonArray.Create(Self);
json.AppendArray2('Price',aPrice.ControlInterface);

// Entry in aPrice will be a JSON object.

// Append a new/empty ojbect to the end of the aPrice array.
priceObj := TChilkatJsonObject.Create(Self);

aPrice.AddObjectAt2(-1,priceObj.ControlInterface);
success := priceObj.AddStringAt(-1,'type','Hardcover');
success := priceObj.AddNumberAt(-1,'price','16.65');

aPrice.AddObjectAt2(-1,priceObj.ControlInterface);
success := priceObj.AddStringAt(-1,'type','Kindle Edition');
success := priceObj.AddNumberAt(-1,'price','7.00');

json.EmitCompact := 0;
Memo1.Lines.Add(json.Emit());
end;