Error The program has unexpectedly finished while uploading multiple files

[developerNancy]

I want to upload multiple files on server here is my code but using this code application crashed

 QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
 QHttpPart imagePart;
 imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("text/plain"));
 QString uploadFile = uploadLine->text();

 if(! uploadFile.isEmpty())
 {

    QDirIterator UploadFolderFiles(uploadFile, QDir::Files | QDir::NoDotAndDotDot | QDir::NoSymLinks, QDirIterator::Subdirectories);
   while (UploadFolderFiles.hasNext()) {
             //get the files

             QString currentFile = UploadFolderFiles.next();
             qDebug() << currentFile;

             imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data;name=usersfilename;         filename="+currentFile));
             QHttpPart textPart;
             textPart.setBody("file");
             QFile *file = new QFile(currentFile);
             file->open(QIODevice::ReadOnly);
             imagePart.setBodyDevice(file);
             file->setParent(multiPart);
             multiPart->append(textPart);
             multiPart->append(imagePart);

             QString uploadDocUrl = docxProLine->text();
             QString clientToken = tokenLine->text();
             QUrl url(uploadDocUrl + "?ClientToken="+clientToken);
             QNetworkRequest request(url);
             qDebug() <<url;

             QNetworkAccessManager *networkManager= new QNetworkAccessManager;
             QNetworkReply * reply = networkManager->post(request, multiPart);
             multiPart->setParent(reply); // delete the multiPart with the reply

                qDebug() <<reply;
                if (reply->error() == QNetworkReply::NoError)
                                      {
               
                                          QString strReply = (QString)reply->readAll();
               
                                          //parse json
                                          qDebug() << "Response:" << strReply;
                                          QJsonDocument jsonResponse = QJsonDocument::fromJson(strReply.toUtf8());
                                          QJsonObject jsonObj = jsonResponse.object();
                                          QJsonObject result=jsonObj["result"].toObject();
               
                                          if(jsonObj["error"].toBool()==false)
               
                                          {
                                              QJsonObject data=result["data"].toObject();
                                              QMessageBox::information(this, tr("Uploaded Successful"),
                                                  tr("\"%1\"uploaded successfully").arg("File"));
               
                                          }
                                          else
                                          {
                                              QErrorMessage msg;
                                              msg.showMessage("Error during upload proces");
                                              msg.exec();
                                          }
                                          delete reply;
               
                                      
             

                   }


            }//while ends here

   }//if ends here null

     else{


 }

[developerNancy]

@developerNancy Here is the Error

QObject::setParent: Cannot set parent, new parent is in a different thread
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
The program has unexpectedly finished.

[JKSH]

First of all, don't create a new QNetworkAccessManager for each file. Create one QNetworkAccessManager only, and use that to upload all your files.

If that still doesn't resolve your issue, post your updated code here.