(Delphi ActiveX) Quickbooks Delete an Invoice

Demonstrates how to delete an invoice using the Quickbooks REST API.

For more information, see https://www.developer.intuit.com/app/developer/qbo/docs/api/accounting/most-commonly-used/invoice#delete-an-invoice

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
jsonToken: TChilkatJsonObject;
success: Integer;
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
success: Integer;
sbAuth: TChilkatStringBuilder;
jsonReq: TChilkatJsonObject;
sbRequestBody: TChilkatStringBuilder;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
jsonResponse: TChilkatJsonObject;
InvoiceStatus: WideString;
InvoiceDomain: WideString;
InvoiceId: WideString;
time: WideString;

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

// First get our previously obtained OAuth2 access token.
jsonToken := TChilkatJsonObject.Create(Self);
success := jsonToken.LoadFile('qa_data/tokens/qb-access-token.json');

rest := TChilkatRest.Create(Self);

// Connect to the REST server.
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('sandbox-quickbooks.api.intuit.com',port,bTls,bAutoReconnect);

sbAuth := TChilkatStringBuilder.Create(Self);
sbAuth.Append('Bearer ');
sbAuth.Append(jsonToken.StringOf('access_token'));
rest.Authorization := sbAuth.GetAsString();

// --------------------------------------------------------------------------
// Note: The above code to setup the initial REST connection
// can be done once.  After connecting, any number of REST calls can be made.
// If the connection is lost, the next REST method call will automatically
// reconnect if needed.
// --------------------------------------------------------------------------

// Create the following JSON:

// {
//   "SyncToken": "3",
//   "Id": "33"
// }
// 
// Use the this online tool to generate the code from sample JSON: 
// Generate Code to Create JSON

jsonReq := TChilkatJsonObject.Create(Self);
jsonReq.UpdateString('SyncToken','3');
jsonReq.UpdateString('Id','33');

sbRequestBody := TChilkatStringBuilder.Create(Self);
jsonReq.EmitSb(sbRequestBody.ControlInterface);

rest.AddHeader('Content-Type','application/json');
rest.AddHeader('Accept','application/json');
rest.AllowHeaderFolding := 0;

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('POST','/v3/company/<realmID>/invoice?operation=delete',sbRequestBody.ControlInterface,sbResponseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

respStatusCode := rest.ResponseStatusCode;

// Success is indicated by a 200 response status code.
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));

jsonResponse := TChilkatJsonObject.Create(Self);
jsonResponse.LoadSb(sbResponseBody.ControlInterface);
jsonResponse.EmitCompact := 0;
Memo1.Lines.Add(jsonResponse.Emit());

if (rest.ResponseStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample output...
// (See the parsing code below..)
// 
// Use the this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "Invoice": {
//     "status": "Deleted",
//     "domain": "QBO",
//     "Id": "33"
//   },
//   "time": "2013-03-15T00:18:15.322-07:00"
// }
// 

InvoiceStatus := jsonResponse.StringOf('Invoice.status');
InvoiceDomain := jsonResponse.StringOf('Invoice.domain');
InvoiceId := jsonResponse.StringOf('Invoice.Id');
time := jsonResponse.StringOf('time');
end;