public void CheckIn()
        {
            BitmapSource srs    = (BitmapSource)checkInWindow.ImageSource;
            Bitmap       bitmap = null;

            if (srs != null)
            {
                using (MemoryStream outStream = new MemoryStream())
                {
                    BitmapEncoder enc = new BmpBitmapEncoder();

                    enc.Frames.Add(BitmapFrame.Create(srs));
                    enc.Save(outStream);
                    bitmap = new Bitmap(outStream);
                }
            }
            try
            {
                String         content        = QRModuleLib.QRModule.DecodeFromQRCode(bitmap);
                DataEncryption dataEncryption = new DataEncryption(null, content);
                content = dataEncryption.InputCode;
                if (content == null)
                {
                    checkInWindow.Status = "Waiting....";
                }
                else
                {
                    CheckInDao checkInDao = new CheckInDao();
                    checkInDao.MakeConnection(Properties.Resources.strConnection);
                    try
                    {
                        int        id         = int.Parse(content);
                        CheckInDto checkInDto = checkInDao.CheckInByAttendeesID(id);
                        if (checkInDto.Check)
                        {
                            checkInWindow.Status = "QR code is checked!";
                        }
                        else
                        {
                            checkInDao.UpdateStatus(id, true);
                            LoadMemberEvent();
                            checkInWindow.Status = checkInDto.Name;
                        }
                    }
                    catch
                    {
                        checkInWindow.Status = "QR code is not existed!";
                    }
                }
            }
            catch (NullReferenceException ex)
            {
                checkInWindow.Status = "Waiting";
            }
        }
        public void SubmitCheckIn()
        {
            EventDao eventDao = new EventDao();

            eventDao.MakeConnection(Properties.Resources.strConnection);
            eventDao.UpdateStatus(checkInWindow.EventID, "checked in");
            CheckInDao checkInDao = new CheckInDao();

            checkInDao.MakeConnection(Properties.Resources.strConnection);
            List <CheckInDto> checkInDtos = (List <CheckInDto>)checkInWindow.MemberInEventData;
            List <CheckBox>   checkBoxes  = (List <CheckBox>)checkInWindow.MemberInEventShow;

            foreach (CheckInDto checkInDto in checkInDtos)
            {
                checkInDao.UpdateStatus(checkInDto.EventAttendeesID, (bool)checkBoxes[checkInDtos.IndexOf(checkInDto)].IsChecked);
            }
        }