How to save finger thumb in sql database?

public partial class EnrollmentForm : Form
    {
        // Constructor
        public EnrollmentForm(AppData data)
        {
            InitializeComponent();
            Data = data;                                        // Keep reference to the data
            ExchangeData(true);                                 // Init data with default control values;
            Data.OnChange += delegate { ExchangeData(false); }; // Track data changes to keep the form synchronized
        }

        // Simple dialog data exchange (DDX) implementation.
        public void ExchangeData(bool read)
        {
            if (read)
            {   // read values from the form's controls to the data object
                Data.EnrolledFingersMask = EnrollmentControl.EnrolledFingerMask;
                Data.MaxEnrollFingerCount = EnrollmentControl.MaxEnrollFingerCount;
                Data.Update();
            }
            else
            {   // read values from the data object to the form's controls
                EnrollmentControl.EnrolledFingerMask = Data.EnrolledFingersMask;
                EnrollmentControl.MaxEnrollFingerCount = Data.MaxEnrollFingerCount;
            }
        }

        // event handling
        public void EnrollmentControl_OnEnroll(Object Control, int Finger, DPFP.Template Template, ref DPFP.Gui.EventHandlerStatus Status)
        {
            if (Data.IsEventHandlerSucceeds)
            {
                Data.Templates[Finger-1] = Template;            // store a finger template
                ExchangeData(true);                             // update other data

                ListEvents.Items.Insert(0, String.Format("OnEnroll: finger {0}", Finger));
            }
            else
                Status = DPFP.Gui.EventHandlerStatus.Failure;   // force a "failure" status
        }

        public void EnrollmentControl_OnDelete(Object Control, int Finger, ref DPFP.Gui.EventHandlerStatus Status)
        {
            if (Data.IsEventHandlerSucceeds) {
                Data.Templates[Finger-1] = null;                // clear the finger template
                ExchangeData(true);                             // update other data

                ListEvents.Items.Insert(0, String.Format("OnDelete: finger {0}", Finger));
            }
            else
                Status = DPFP.Gui.EventHandlerStatus.Failure;   // force a "failure" status
        }

        private void EnrollmentControl_OnCancelEnroll(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnCancelEnroll: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private void EnrollmentControl_OnReaderConnect(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnReaderConnect: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private void EnrollmentControl_OnReaderDisconnect(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnReaderDisconnect: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private void EnrollmentControl_OnStartEnroll(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnStartEnroll: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private void EnrollmentControl_OnFingerRemove(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnFingerRemove: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private void EnrollmentControl_OnFingerTouch(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnFingerTouch: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private void EnrollmentControl_OnSampleQuality(object Control, string ReaderSerialNumber, int Finger, DPFP.Capture.CaptureFeedback CaptureFeedback)
        {
            ListEvents.Items.Insert(0, String.Format("OnSampleQuality: {0}, finger {1}, {2}", ReaderSerialNumber, Finger, CaptureFeedback));
        }

        private void EnrollmentControl_OnComplete(object Control, string ReaderSerialNumber, int Finger)
        {
            ListEvents.Items.Insert(0, String.Format("OnComplete: {0}, finger {1}", ReaderSerialNumber, Finger));
        }

        private AppData Data;

        private void EnrollmentForm_Load(object sender, EventArgs e)
        {
            this.ListEvents.Items.Clear();
        }

        private void EnrollmentControl_Load(object sender, EventArgs e)
        {

        }
   }