(Delphi DLL) Google Sheets - Read a Single Range

Reads the values stored in the range Sheet1!A1:B5 and returns them in the response.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
jsonToken: HCkJsonObject;
success: Boolean;
http: HCkHttp;
jsonResponse: PWideChar;
json: HCkJsonObject;
i: Integer;
count_i: Integer;
j: Integer;
count_j: Integer;
range: PWideChar;
majorDimension: PWideChar;
strVal: PWideChar;

begin
//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  This example uses a previously obtained access token having permission for the
//  Google Sheets scope.

//  In this example, Get Google Sheets OAuth2 Access Token, the access
//  token was saved to a JSON file.  This example fetches the access token from the file..
jsonToken := CkJsonObject_Create();
success := CkJsonObject_LoadFile(jsonToken,'qa_data/tokens/googleSheets.json');
if (CkJsonObject_HasMember(jsonToken,'access_token') = False) then
  begin
    Memo1.Lines.Add('No access token found.');
    Exit;
  end;
http := CkHttp_Create();
CkHttp_putAuthToken(http,CkJsonObject__stringOf(jsonToken,'access_token'));

//  Get the cells defined by the range A1:B5
jsonResponse := CkHttp__quickGetStr(http,'https://sheets.googleapis.com/v4/spreadsheets/spreadsheetId/values/Sheet1!A1:B5');
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add(jsonResponse);

json := CkJsonObject_Create();
CkJsonObject_Load(json,jsonResponse);

//  A sample response is shown below.
//  To generate the parsing source code for a JSON response, paste
//  the JSON into this online tool: Generate JSON parsing code

//  {
//    "range": "Sheet1!A1:B5",
//    "majorDimension": "ROWS",
//    "values": [
//      [
//        "Item",
//        "Cost"
//      ],
//      [
//        "Wheel",
//        "$20.50"
//      ],
//      [
//        "Door",
//        "$15"
//      ],
//      [
//        "Engine",
//        "$100"
//      ],
//      [
//        "Totals",
//        "$135.50"
//      ]
//    ]
//  }

range := CkJsonObject__stringOf(json,'range');
majorDimension := CkJsonObject__stringOf(json,'majorDimension');
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'values');
while i < count_i do
  begin
CkJsonObject_putI(json,i);
    j := 0;
    count_j := CkJsonObject_SizeOfArray(json,'values[i]');
    while j < count_j do
      begin
CkJsonObject_putJ(json,j);
        strVal := CkJsonObject__stringOf(json,'values[i][j]');
        j := j + 1;
      end;

    i := i + 1;
  end;

CkJsonObject_Dispose(jsonToken);
CkHttp_Dispose(http);
CkJsonObject_Dispose(json);

end;