我们如何将指纹 reader 部署到 C# Web 应用程序？

Question

我正在开发一个薪资系统，其中应通过指纹记录考勤 machine.I 已经安装了 SDK 软件，但我不知道如何在我的 Web 应用程序中部署它。还有我们如何将指纹保存在我们的数据库中，以便我们可以根据指纹保存考勤详细信息

提前致谢法瑞达·侯赛因

Answer 1

我们以前有过这样的项目。您需要一个 sdk（软件开发工具包）才能转到您的设备。将其添加到您的项目引用中，以便您可以与之通信。我相信在 SDK 站点中有一个示例代码，您可以在指纹 reader 的情况下找到您可以修改的示例代码。

这里是我们直接在数据库中保存指纹的示例代码

private void SaveButton_Click(object sender, EventArgs e)
{
    MemoryStream fingerprintData = new MemoryStream();
    Template.Serialize(fingerprintData);
    fingerprintData.Position = 0;
    BinaryReader br = new BinaryReader(fingerprintData);
    Byte[] bytes = br.ReadBytes((Int32)fingerprintData.Length);

    //Insert the file into database
    SqlConnection cn = new SqlConnection("Data Source=10.115.5.3; Initial Catalog=EnrollmentSampledb;Integrated Security=SSPI;");
    SqlCommand cmd = new SqlCommand("INSERT INTO tblUser VALUES(@ID_NUMBER, @FIRSTNAME, @LASTNAME, @FINGERPRINT, @DATE_ADDED, @DATE_MODIFIED)", cn);
    cmd.Parameters.Add("ID_NUMBER", SqlDbType.NVarChar).Value = tboxIdNum.Text;
    cmd.Parameters.Add("FIRSTNAME", SqlDbType.NVarChar).Value = tboxFname.Text;
    cmd.Parameters.Add("LASTNAME", SqlDbType.NVarChar).Value = tboxLname.Text;
    cmd.Parameters.Add("FINGERPRINT", SqlDbType.Image).Value = bytes;
    cmd.Parameters.Add("DATE_ADDED", SqlDbType.DateTime).Value = DateTime.Now;
    cmd.Parameters.Add("DATE_MODIFIED", SqlDbType.DateTime).Value = DateTime.Now;

    cn.Open();
    cmd.ExecuteNonQuery();
    cn.Close();

    tboxIdNum.Text = "";
    tboxFname.Text = "";
    tboxLname.Text = "";
}

另请参阅我的类似问题 here 以将指纹直接保存在数据库中。

Answer 2

区域功能指纹

    protected void ReaderFPMachine()
    {
        _readerCollection = ReaderCollection.GetReaders();
        foreach (Reader Reader in _readerCollection)
        {
            _fPMachineID = Reader.Description.SerialNumber;
            break;
        }

        this.CheckFingerPrint();
    }

    protected void CheckFingerPrint()
    {
        try
        {
            _finger = null;
            _reader = _readerCollection[0];
            if (!OpenReader())
            {
                //this.Close();
            }
            if (!StartCaptureAsync(this.OnCaptured))
            {
                //this.Close();
            }


        }
        catch (Exception ex)
        {

        }
    }

    private void OnCaptured(CaptureResult captureResult)
    {
        try
        {
            _finger = null;
            // Check capture quality and throw an error if bad.
            if (!CheckCaptureResult(captureResult)) return;

            //SendMessage(Action.SendMessage, "A finger was captured.");

            DataResult<Fmd> resultConversion = FeatureExtraction.CreateFmdFromFid(captureResult.Data, Constants.Formats.Fmd.ANSI);
            if (resultConversion.ResultCode != Constants.ResultCode.DP_SUCCESS)
            {
                _reset = true;
                throw new Exception(resultConversion.ResultCode.ToString());
            }

            _finger = resultConversion.Data;
            _fingerPrintID = Fmd.SerializeXml(_finger);
            //MsVisitorHd _msVisitorHd = this._vMSBL.GetSingleMsVisitorHdByFingerPrintID(_fingerXML);
            //List<MsVisitorHd> _listMsVisitorHd = this._vMSBL.GetListMsVisitorHd();
            bool _exist = false;
            //foreach (var _item in _listMsVisitorHd)
            //{

            //    Fmd _fmd = Fmd.DeserializeXml(_fingerPrintID);
            //    Fmd _fmd2 = Fmd.DeserializeXml(_item.FingerPrintID);
            //    CompareResult compareResult = Comparison.Compare(_fmd, 0, _fmd2, 0);
            //    if (compareResult.ResultCode != Constants.ResultCode.DP_SUCCESS)
            //    {
            //        _reset = true;
            //        throw new Exception(compareResult.ResultCode.ToString());
            //    }
            //    else
            //    {
            //        if (compareResult.Score < (PROBABILITY_ONE / 100000))
            //        {
            //            //_visitorExist = new MsVisitorHd();
            //            //_visitorExist = _item;
            //            _exist = true;
            //            break;
            //        }
            //        else
            //        {

            //        }

            //    }
            //}
            if (!CheckCaptureResult(captureResult)) return;

            // Create bitmap
            foreach (Fid.Fiv fiv in captureResult.Data.Views)
            {
                this.FingerPictureBox.BackgroundImage = CreateBitmap(fiv.RawImage, fiv.Width, fiv.Height);
            }
            if (_exist)
            {
                _fgMember = "Y";
                //MessageBox.Show("Sidik jadi terdaftar sebagai " + _visitorExist.VisitorName);
            }
            else
            {

                _fgMember = "N";
            }

            //SendMessage(Action.SendMessage, secondFinger.Bytes.ToString() + "Comparison resulted in a dissimilarity score of " + compareResult.Score.ToString() + (compareResult.Score < (PROBABILITY_ONE / 100000) ? " (fingerprints matched)" : " (fingerprints did not match)"));
            //SendMessage(Action.SendMessage, "Place a finger on the reader.");
            //    count = 0;
            //}
        }
        catch (Exception ex)
        {
            // Send error message, then close form
            //SendMessage(Action.SendMessage, "Error:  " + ex.Message);
        }
    }


    public bool OpenReader()
    {
        _reset = false;
        Constants.ResultCode result = Constants.ResultCode.DP_DEVICE_FAILURE;

        // Open reader
        result = _reader.Open(Constants.CapturePriority.DP_PRIORITY_COOPERATIVE);
        if (result != Constants.ResultCode.DP_SUCCESS)
        {
            MessageBox.Show("Error:  " + result);
            _reset = true;
            return false;
        }

        return _reset;
    }

    public void GetStatus()
    {
        Constants.ResultCode result = _reader.GetStatus();

        if ((result != Constants.ResultCode.DP_SUCCESS))
        {
            _reset = true;
            throw new Exception("" + result);
        }

        if ((_reader.Status.Status == Constants.ReaderStatuses.DP_STATUS_BUSY))
        {
            Thread.Sleep(50);
        }
        else if ((_reader.Status.Status == Constants.ReaderStatuses.DP_STATUS_NEED_CALIBRATION))
        {
            _reader.Calibrate();
        }
        else if ((_reader.Status.Status != Constants.ReaderStatuses.DP_STATUS_READY))
        {
            throw new Exception("Reader Status - " + _reader.Status.Status);
        }
    }

    public bool CheckCaptureResult(CaptureResult captureResult)
    {
        if (captureResult.Data == null)
        {
            if (captureResult.ResultCode != Constants.ResultCode.DP_SUCCESS)
            {
                _reset = true;
                throw new Exception(captureResult.ResultCode.ToString());
            }

            // Send message if quality shows fake finger
            if ((captureResult.Quality != Constants.CaptureQuality.DP_QUALITY_CANCELED))
            {
                throw new Exception("Quality - " + captureResult.Quality);
            }
            return false;
        }

        return true;
    }

    public bool CaptureFingerAsync()
    {
        try
        {
            GetStatus();

            Constants.ResultCode captureResult = _reader.CaptureAsync(Constants.Formats.Fid.ANSI, Constants.CaptureProcessing.DP_IMG_PROC_DEFAULT, _reader.Capabilities.Resolutions[0]);
            if (captureResult != Constants.ResultCode.DP_SUCCESS)
            {
                _reset = true;
                throw new Exception("" + captureResult);
            }

            return true;
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error:  " + ex.Message);
            return false;
        }
    }

    public Bitmap CreateBitmap(byte[] bytes, int width, int height)
    {
        byte[] rgbBytes = new byte[bytes.Length * 3];

        for (int i = 0; i <= bytes.Length - 1; i++)
        {
            rgbBytes[(i * 3)] = bytes[i];
            rgbBytes[(i * 3) + 1] = bytes[i];
            rgbBytes[(i * 3) + 2] = bytes[i];
        }
        Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);

        BitmapData data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, PixelFormat.Format24bppRgb);

        for (int i = 0; i <= bmp.Height - 1; i++)
        {
            IntPtr p = new IntPtr(data.Scan0.ToInt64() + data.Stride * i);
            System.Runtime.InteropServices.Marshal.Copy(rgbBytes, i * bmp.Width * 3, p, bmp.Width * 3);
        }

        bmp.UnlockBits(data);

        return bmp;
    }

    public bool StartCaptureAsync(Reader.CaptureCallback OnCaptured)
    {
        // Activate capture handler
        _reader.On_Captured += new Reader.CaptureCallback(OnCaptured);

        // Call capture
        if (!CaptureFingerAsync())
        {
            return false;
        }

        return true;
    }

    #endregion

我们如何将指纹 reader 部署到 C# Web 应用程序？

How can we deploy finger print reader to C# web application?

c#

fingerprint

sql-server-2008-r2

区域功能指纹