private void StartCapturing()
{
//NFingerScanner scanner = scannersListBox.SelectedItem as NFingerScanner;
_currentScanner = scannersListBox.SelectedItem as NFingerScanner;
if (_currentScanner == null)
{
MessageBox.Show(@"Please select a scanner from the list.");
return;
}
OnIsScanningChanged(true);
//scanWorker.RunWorkerAsync(_currentScanner);
// Create a finger
_subjectFinger = new NFinger();
// Add finger to the subject and fingerView
_subject = new NSubject();
_subject.Fingers.Add(_subjectFinger);
_subjectFinger.PropertyChanged += OnAttributesPropertyChanged;
_nfView.Finger = _subjectFinger;
_nfView.ShownImage = ShownImage.Original;
// Begin capturing
_biometricClient.FingersReturnBinarizedImage = true;
var task = _biometricClient.CreateTask(NBiometricOperations.Detect | NBiometricOperations.Capture | NBiometricOperations.CreateTemplate | NBiometricOperations.AssessQuality, _subject);
_biometricClient.BeginPerformTask(task, OnEnrollCompleted, null);
}
private void timerScannerStatus_Tick(object sender, EventArgs e)
{
ShowMessage(@"Place your finger on the scanner firmly");
lblQuality.Text = string.Empty;
if (scannerStatus)
{
try
{
int selectedScannerIndex = Convert.ToInt32(_AppSettings.ScannerDevice);
NFingerScanner scanner = devices[selectedScannerIndex] as NFingerScanner;
if (scanner == null)
{
ShowMessage(@"No Scanner found.");
return;
}
if (scanWorker.IsBusy)
{
ShowMessage(@"Scan already in progress.");
return;
}
OnIsScanningChanged(true);
scanWorker.RunWorkerAsync(scanner);
}
catch (Exception ex)
{
Logger.logToFile(ex, AppSettings.ErrorLogPath);
ShowMessage(ex.Message);
}
}
}
private void ScanWorkerDoWork(object sender, DoWorkEventArgs e)
{
timerScannerStatus.Stop();
NFingerScanner scanner = (NFingerScanner)e.Argument;
_currentScanner = scanner;
StartCapturing(scanner);
}
private void ScanWorkerRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
_currentScanner = null;
if (_nfView.Finger.Image != null)
{
_nfView.Finger.Image.Dispose();
_nfView.Finger.Image = null;
}
if (_nfView.Finger.Objects[0].Template != null)
{
_nfView.Finger.Objects[0].Template.Dispose();
_nfView.Finger.Objects[0].Template = null;
}
lblQuality.Text = string.Empty;
if (e.Error != null)
{
MessageBox.Show(e.Error.Message);
Logger.logToFile(e.Error, AppSettings.ErrorLogPath);
return;
}
if (e.Cancelled)
{
lblQuality.Text = @"Scanning canceled.";
return;
}
NImage image = e.Result as NImage;
if (image == null)
{
return;
}
_nfView.Width = (int)panelFingerPrint.Width;
_nfView.Height = (int)panelFingerPrint.Height;
_nfView.Finger.Image = image;
_nfView.Refresh();
}
private void ScanWorkerDoWork(object sender, DoWorkEventArgs e)
{
NFingerScanner scanner = (NFingerScanner)e.Argument;
_currentScanner = scanner;
scanner.Preview += new EventHandler <NFScannerPreviewEventArgs>(ScannerPreview);
try
{
e.Result = scanner.Capture();
}
finally
{
scanner.Preview -= new EventHandler <NFScannerPreviewEventArgs>(ScannerPreview);
}
if (((BackgroundWorker)sender).CancellationPending)
{
e.Cancel = true;
}
}
private void ScanWorkerRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
_currentScanner = null;
}