(Delphi ActiveX) MS Graph Calendars List

Get all the user's calendars (/calendars navigation property), get the calendars from the default calendar group or from a specific calendar group.

For more details, see https://docs.microsoft.com/en-us/graph/api/user-list-calendars?view=graph-rest-1.0

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
http: TChilkatHttp;
jsonToken: TChilkatJsonObject;
success: Integer;
strResponse: WideString;
json: TChilkatJsonObject;
odataContext: WideString;
i: Integer;
count_i: Integer;
id: WideString;
name: WideString;
color: WideString;
changeKey: WideString;
canShare: Integer;
canViewPrivateItems: Integer;
canEdit: Integer;
ownerName: WideString;
ownerAddress: WideString;

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

http := TChilkatHttp.Create(Self);

// Use your previously obtained access token as shown here:
//    Get Microsoft Graph OAuth2 Access Token with Calendars.ReadWrite scope.

jsonToken := TChilkatJsonObject.Create(Self);
success := jsonToken.LoadFile('qa_data/tokens/msGraphCalendar.json');
if (success = 0) then
  begin
    Memo1.Lines.Add(jsonToken.LastErrorText);
    Exit;
  end;
http.AuthToken := jsonToken.StringOf('access_token');

// Send a GET request to https://graph.microsoft.com/v1.0/me/calendars
strResponse := http.QuickGetStr('https://graph.microsoft.com/v1.0/me/calendars');
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
json.Load(strResponse);
json.EmitCompact := 0;

if (http.LastStatus <> 200) then
  begin
    Memo1.Lines.Add(json.Emit());
    Memo1.Lines.Add('Failed, response status code = ' + IntToStr(http.LastStatus));
    Exit;
  end;

Memo1.Lines.Add(json.Emit());

// Sample output:

// {
//   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('admin%40chilkat.io')/calendars",
//   "value": [
//     {
//       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEGAAAA5_vF7TKKdE6bGCRqXyl2PQAAAiCsAAAA",
//       "name": "Calendar",
//       "color": "auto",
//       "changeKey": "5+vF7TKKdE6bGCRqXyl2PQAAAAAiEQ==",
//       "canShare": true,
//       "canViewPrivateItems": true,
//       "canEdit": true,
//       "owner": {
//         "name": "...",
//         "address": "outlook_3A33FCEB9B74CC15@outlook.com"
//       }
//     },
//     {
//       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEGAAAA5_vF7TKKdE6bGCRqXyl2PQAClEpRTgAAAA==",
//       "name": "Work",
//       "color": "auto",
//       "changeKey": "5+vF7TKKdE6bGCRqXyl2PQAClHjDcA==",
//       "canShare": true,
//       "canViewPrivateItems": true,
//       "canEdit": true,
//       "owner": {
//         "name": "...",
//         "address": "outlook_3A33FCEB9B74CC15@outlook.com"
//       }
//     }
//   ]
// }
// 
// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

odataContext := json.StringOf('"@odata.context"');
i := 0;
count_i := json.SizeOfArray('value');
while i < count_i do
  begin
    json.I := i;
    id := json.StringOf('value[i].id');
    name := json.StringOf('value[i].name');
    color := json.StringOf('value[i].color');
    changeKey := json.StringOf('value[i].changeKey');
    canShare := json.BoolOf('value[i].canShare');
    canViewPrivateItems := json.BoolOf('value[i].canViewPrivateItems');
    canEdit := json.BoolOf('value[i].canEdit');
    ownerName := json.StringOf('value[i].owner.name');
    ownerAddress := json.StringOf('value[i].owner.address');
    i := i + 1;
  end;

Memo1.Lines.Add('Success.');
end;