How can I save and retrieve a fingerprint template in database using VB. (Digital persona)

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I'm having trouble saving the template of fingerprint in byte. Can you help me to solve this problem? I wan't to save the fingerprint into the database and retrieve it. I've tried codes from different sites but I can't get what I want. Please help.

What I have tried:

Private Sub enrollment_OnEnroll(ByVal enrollmentControl As DPCtlUruNet.EnrollmentControl, ByVal result As DataResult(Of Fmd), ByVal fingerPosition As Integer) Handles enrollmentControl.OnEnroll
        If enrollmentControl.Reader IsNot Nothing Then
            SendMessage4("OnEnroll:  " & Convert.ToString(enrollmentControl.Reader.Description.Name) & ", finger " & fingerPosition)
            SendMessage4("Enrollment Finger Mask: " & _enrollmentControl.EnrolledFingerMask)
        Else
            SendMessage4("OnEnroll:  No Reader Connected, finger " & fingerPosition)
        End If

        Dim fingerprint As String
        Dim fp() As Byte

        Dim conn0 As New MySqlConnection
        Dim command0 As New MySqlCommand
        conn0.ConnectionString = "SERVER=localhost; USER ID=usr; PASSWORD=usrpass; DATABASE=ams2"
        ' Save the enrollment to file.
        If result IsNot Nothing AndAlso result.Data IsNot Nothing Then
            _sender.Fmds.Add(fingerPosition, result.Data)
            fingerprint = Fmd.SerializeXml(result.Data)

            Try
                fp = result.Data.Bytes
                conn0.Open()
                With command0
                    .Connection = conn0

                    .CommandTimeout = 99999
                    .CommandText = "set net_write_timeout=99999; set net_read_timeout=99999"
                    command0.ExecuteNonQuery()

                    .CommandText = "INSERT INTO pr_fingerprint(EMployee_ID, Finger_ID, Img, template)" & _
                        " VALUES(@EMployee_ID, @Finger_ID, @Img, @template)"
                    .Parameters.AddWithValue("@Employee_ID=", EmployeeID.Text)
                    .Parameters.AddWithValue("@Finger_ID=", fingerPosition)
                    .Parameters.AddWithValue("@Img", fp)
                    .Parameters.AddWithValue("@template", fingerprint)
                    .Parameters.Clear()
                    .ExecuteNonQuery()

                    .CommandText = "UPDATE pr_fingerprint f SET Finger_Name=" & _
                        "(SELECT Finger_Name FROM pr_fingers WHERE Finger_ID=f.`Finger_ID`) " & _
                        "WHERE ISNULL(f.`Finger_Name`)"
                    .ExecuteNonQuery()
                End With

                conn0.Close()
            Catch ex As Exception
                MsgBox(ex.Message & vbNewLine & vbNewLine & ex.StackTrace, MsgBoxStyle.Critical, "Error")
            End Try
        End If

        btnCancel.Enabled = False

        _sender.btnIdentificationControl.Enabled = True
    End Sub

Posted 28-Jun-18 22:09pm

The Cool Cat

Updated 20-May-19 14:46pm

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Comments

Richard MacCutchan 29-Jun-18 4:53am

"I'm having trouble ..."
What sort of trouble? Please edit your question and explain clearly what does not work or what incorrect results you are seeing.

The Cool Cat 29-Jun-18 20:27pm

Reply Modify the comment. Delete the comment.
I have a problem in comparing the templates, and I found out that the XML was not fully saved in the DB which what causes the trouble. I changed the datatype from Text to Varchar(MAX), and it solved the problem.

Rulph Buwen Tejano 2-Feb-19 12:15pm

What part in the code is use to save the fingerprint to database?

The Cool Cat 3-Feb-19 22:02pm

This Part:

"INSERT INTO pr_fingerprint(EMployee_ID, Finger_ID, Img, template)" & _
" VALUES(@EMployee_ID, @Finger_ID, @Img, @template)"
.Parameters.AddWithValue("@Employee_ID=", EmployeeID.Text)
.Parameters.AddWithValue("@Finger_ID=", fingerPosition)
.Parameters.AddWithValue("@Img", fp)
.Parameters.AddWithValue("@template", fingerprint)
.Parameters.Clear()
.ExecuteNonQuery()

Rulph Buwen Tejano 23-Feb-19 6:21am

thank you :D

Noy SYBOUNHEUANG 20-Apr-23 10:24am

How can I save and retrieve a fingerprint template in the database using VB.NET (Digital persona)

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The Cool Cat · Accepted Answer · 2018-06-29T14:26:00

I Already found a solution in how to retrieve and save the fingerprint template, I can now also compare the Templates with the scanned fingerprint.
I used

Fmd.SerializeXml(result.Data)

in saving the fingerprint template and used Varchar(MAX) as the datatype in the database. In comparing the templates I load all the templates from the database into an array

Private fingerList As New List(Of Fmd)

conn0.Open()
        command0.Connection = conn0
        command0.CommandText = "SELECT Template FROM pr_fingerprint"
        reader0 = command0.ExecuteReader
        With reader0
            While .Read
                s = .Item("Template")
                fingerList.Add(Fmd.DeserializeXml(s))
            End While
        End With
        conn0.Close()

I compare the finger templates using

Dim identifyResult = Comparison.Identify(anyFinger, 0, fingerList, thresholdScore, 2)

And It's a success.