Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 5231
  • Last Modified:

JSON whith Delphi Xe2

Hi Experts,

I have a JSON file with the following structure:

 level 1  
  1
  2
  3     level 2
  4------4.1
          4.2      level 3
          4.3------4.3.1
          4.4      4.3.2
           ...       4.3.3
                    4.3.4
                     .....

My file has 3 level of datas par. My delphi code only get information until level 2, but i need get all informationsof of all levels. Thanks for some help.

My code is:

procedure TForm1.inicio;
var
  obj1, obj2: TJSONObject;
  array1: TJSONArray;
  par1, par2: TJSONPair;
  i, j: integer;
  valor: string;
begin
  valor := Memo1.Text;
  obj1 := TJSONObject.ParseJSONValue(TEncoding.ASCII.GetBytes(valor), 0)
    as TJSONObject;

  par1 := TJSONPair.Create;
  par1 := obj1.Get(3);

  array1 := TJSONArray.Create;
  array1 := (par1.JsonValue as TJSONArray);

  Form1.Memo2.Lines.Add('number of object is ' + IntToStr(array1.Size));

  obj2 := TJSONObject.Create;
  par2 := TJSONPair.Create;

  for i := 0 to array1.Size - 1 do
  begin
    obj2 := (array1.Get(i) as TJSONObject);
    Form1.Memo2.Lines.Add('');
    Form1.Memo2.Lines.Add('Element ' + IntToStr(i) +
      ' the number of pairs of the object is = ' + IntToStr(obj2.Size));
    for j := 0 to obj2.Size - 1 do
    begin
      par2 := obj2.Get(j);
      Form1.Memo2.Lines.Add(par2.JsonString.Value + ' : ' +
        par2.JsonValue.Value);
    end;
  end;
end;
0
alpires
Asked:
alpires
  • 2
1 Solution
 
Sinisa VukCommented:
what is your goal? to fill memo or .... when you have tree like structure it is recommended
to use recursive functions (when you detect subtree/level then call function itself with some other parameters)
0
 
alpiresAuthor Commented:
Memo is only a example. I need get the informations and put in a var, but I dont know how do this using TJSONObject.
0
 
Sinisa VukCommented:
Maybe you can look this:
http://edn.embarcadero.com/article/40882

Work wit Json is more like working with xml.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now