(Delphi DLL) 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 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, StringBuilder, Rest, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
jsonToken: HCkJsonObject;
success: Boolean;
rest: HCkRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
success: Boolean;
sbAuth: HCkStringBuilder;
jsonReq: HCkJsonObject;
sbRequestBody: HCkStringBuilder;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jsonResponse: HCkJsonObject;
InvoiceStatus: PWideChar;
InvoiceDomain: PWideChar;
InvoiceId: PWideChar;
time: PWideChar;

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 := CkJsonObject_Create();
success := CkJsonObject_LoadFile(jsonToken,'qa_data/tokens/qb-access-token.json');

rest := CkRest_Create();

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

sbAuth := CkStringBuilder_Create();
CkStringBuilder_Append(sbAuth,'Bearer ');
CkStringBuilder_Append(sbAuth,CkJsonObject__stringOf(jsonToken,'access_token'));
CkRest_putAuthorization(rest,CkStringBuilder__getAsString(sbAuth));

// --------------------------------------------------------------------------
// 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 := CkJsonObject_Create();
CkJsonObject_UpdateString(jsonReq,'SyncToken','3');
CkJsonObject_UpdateString(jsonReq,'Id','33');

sbRequestBody := CkStringBuilder_Create();
CkJsonObject_EmitSb(jsonReq,sbRequestBody);

CkRest_AddHeader(rest,'Content-Type','application/json');
CkRest_AddHeader(rest,'Accept','application/json');
CkRest_putAllowHeaderFolding(rest,False);

sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'POST','/v3/company/<realmID>/invoice?operation=delete',sbRequestBody,sbResponseBody);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

respStatusCode := CkRest_getResponseStatusCode(rest);

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

jsonResponse := CkJsonObject_Create();
CkJsonObject_LoadSb(jsonResponse,sbResponseBody);
CkJsonObject_putEmitCompact(jsonResponse,False);
Memo1.Lines.Add(CkJsonObject__emit(jsonResponse));

if (CkRest_getResponseStatusCode(rest) <> 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 := CkJsonObject__stringOf(jsonResponse,'Invoice.status');
InvoiceDomain := CkJsonObject__stringOf(jsonResponse,'Invoice.domain');
InvoiceId := CkJsonObject__stringOf(jsonResponse,'Invoice.Id');
time := CkJsonObject__stringOf(jsonResponse,'time');

CkJsonObject_Dispose(jsonToken);
CkRest_Dispose(rest);
CkStringBuilder_Dispose(sbAuth);
CkJsonObject_Dispose(jsonReq);
CkStringBuilder_Dispose(sbRequestBody);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jsonResponse);

end;