How to match a fingerprint template from database ?

Question

i now can save a fingerprint template from database using this code..
Dim fingerprintData As MemoryStream = New MemoryStream
Template.Serialize(fingerprintData)
fingerprintData.Position = 0
Dim br As BinaryReader = New BinaryReader(fingerprintData)
Dim bytes() As Byte = br.ReadBytes(CType(fingerprintData.Length, Int32))
Dim cmd As SqlCommand = New SqlCommand("INSERT INTO fininger_table VALUES(@FIRSTNAME, @LASTNAME, @FINGERPRINT)", conn)
cmd.Parameters.Add("FIRSTNAME", SqlDbType.VarChar).Value = CaptureForm.tboxFname.Text
cmd.Parameters.Add("LASTNAME", SqlDbType.VarChar).Value = CaptureForm.tboxLname.Text
cmd.Parameters.Add("FINGERPRINT", SqlDbType.Image).Value = bytes
conn.Open()
cmd.ExecuteNonQuery()
conn.Close()
and i fetch the data when the form is load..
conn.Open()
Dim cmd As New SqlCommand("SELECT * FROM Fininger_table", conn)
Dim rdr As SqlDataReader = cmd.ExecuteReader()
Dim MemStream As IO.MemoryStream
Dim fpBytes As Byte()
While rdr.Read()
fpBytes = rdr("FINGERPRINT")
MemStream = New IO.MemoryStream(fpBytes)
Dim template As New DPFP.Template(MemStream)
OnTemplate(template)
' template.DeSerialize(MemStream)
End While
rdr.Close()
conn.Close()
and now i'm stuck..i dont know how to match the fingerprint from the database to verify the user..
plz help me out..tnx in advance
btw im using a DIGITAL PERSONA FINGERPRINT READER..with the OTW SDK

Answer 1

Hello My dear Brother 
                I am zaid Ahmad khan would like to help you and this is the working code please see this and you will have the solution 
Imports System.Data.SqlClient
Imports DPFP
Public Class Form1
    Private WithEvents verifyControl As DPFP.Gui.Verification.VerificationControl
    Private matcher As DPFP.Verification.Verification
    Private matchResult As DPFP.Verification.Verification.Result
    Private allReaderSerial As String = "00000000-0000-0000-0000-000000000000"
    Public template As DPFP.Template
    Private userTemplateColumn As String = "Template"
    Private userIDColumn As String = "ID"
    Dim bytes As Byte()
    Private Sub CreateDPControl(ByRef control As DPFP.Gui.Verification.VerificationControl)
        Try
            control = New DPFP.Gui.Verification.VerificationControl()
            control.AutoSizeMode = Windows.Forms.AutoSizeMode.GrowAndShrink
            control.Name = "verifyControl"
            control.Location = New System.Drawing.Point(0, 0)
            control.ReaderSerialNumber = "00000000-0000-0000-0000-000000000000"
            control.Visible = True
            control.Enabled = True
            control.BringToFront()
            Me.Controls.Add(control)
        Catch ex As Exception
            MessageBox.Show("exception")
        End Try
    End Sub
    Private Function ConnectString() As String
        Dim connectionString As String
        connectionString = "Server=localhost;database=bs;User ID=sa;Password=123"
        Return connectionString
    End Function
    Private Sub VerifyBiometric_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        matcher = New Verification.Verification()
        matchResult = New Verification.Verification.Result
        CreateDPControl(verifyControl)
    End Sub
    Private Sub verifyControl_OnComplete(ByVal Control As Object, ByVal FeatureSet As DPFP.FeatureSet, ByRef EventHandlerStatus As DPFP.Gui.EventHandlerStatus) Handles verifyControl.OnComplete
        Dim dataSet As DataSet = New DataSet()
        Dim adapter As SqlDataAdapter = New SqlDataAdapter()
        Dim sqlCommand As SqlCommand = New SqlCommand()
        Dim ctr = 0
        Try
            Dim max As Integer = 0
            Dim cn As New SqlConnection(ConnectString())
            cn.Open()
            sqlCommand.CommandText = "Select templateBytes7 from userthumbs where id='1029'"
            sqlCommand.CommandType = CommandType.Text
            sqlCommand.Connection = cn
            Dim lrd As SqlDataReader = sqlCommand.ExecuteReader()
            Dim usr
            While lrd.Read()
                usr = lrd("templateBytes7")
            End While
            bytes = Nothing
            bytes = usr
            template = New DPFP.Template()
            template.DeSerialize(usr)
            'Perform match
            matcher.Verify(FeatureSet, template, matchResult)
            If matchResult.Verified Then
                EventHandlerStatus = Gui.EventHandlerStatus.Success
                MsgBox("Verified!")
                Me.Hide()
                MessageBox.Show("Done")
            Else
                EventHandlerStatus = Gui.EventHandlerStatus.Failure
                MsgBox("Please Try Again!")
            End If
        Finally
        End Try
    End Sub
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    End Sub
End Class