Verification Failure (DigitalPersona 4000B)

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ive seen all the post related to my problem.. but i have different code .. i've searching for the answer for almost 2weeks now .. but no luck .. this is my code i dont know what's happening .. it keeps prompting Verification Failure .. i dont know whats the problem in my code .. the bolded line's where i guess the problem occurs .. can someone kindly help me to fix this :( im using vb.net 2010 as my front and MySql as my back-end.. im using DigitalPersona 4000B

VB

Sub OnComplete(ByVal Control As Object, ByVal FeatureSet As DPFP.FeatureSet, ByRef EventHandlerStatus As DPFP.Gui.EventHandlerStatus) Handles VerificationControl.OnComplete

       Dim con As New MySqlConnection("Server = localhost; Username= root; Password =; Database = fesdata")
       Dim cmd As New MySqlCommand("SELECT * FROM empdata", con)
       con.Open()
       Dim fpreader As MySqlDataReader = cmd.ExecuteReader


       Dim byteTemplate As Byte()
       Dim memStreamTemplate As MemoryStream

       Dim ver As New DPFP.Verification.Verification()
       Dim res As New DPFP.Verification.Verification.Result()

       If fpreader.HasRows Then
           While fpreader.Read

               byteTemplate = fpreader.Item("Fingerprint")
               memStreamTemplate = New MemoryStream(byteTemplate)
               Dim templa8 As DPFP.Template = New DPFP.Template()
               templa8.DeSerialize(memStreamTemplate)

               If Not FeatureSet Is Nothing Then

                   ver.Verify(FeatureSet, templa8, res)
                   If res.Verified Then
                       Call SEARCH_EMPLOYEE()
                   End If
               End If
           End While
       Else
           MsgBox("Unknown Employee!")
       End If
       fpreader.Close()


   End Sub

Posted 21-Dec-13 0:39am

Member 10480399

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Nirav Prabtani 21-Dec-13 6:43am

what is error message??????
&
what is status of res????

ejc67 28-Dec-14 11:47am

I'm looking at saving the fingerprint to MSSQL and being able to verify against MSSQL - I'm using VS2010 as well just like you - were you able to get this working?

2 solutions

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**Nirav Prabtani** · Answer 1 · 2013-12-21T00:46:00

Solution 1

try this method...:)

VB

Dim idResult As DPUruNet.IdentifyResult = DPUruNet.Comparison.Identify("Finger FMD1", 0,"List of finger FMD from Database", 2147, 2)
            If (idResult.ResultCode = DPUruNet.Constants.ResultCode.DP_SUCCESS) Then
                If (idResult.Indexes.Length >= 1) Then  'Found potential match, dont search second collection (speed optimized)
                    userId = "Data from database"
                Else
                    userId = 0
                End If
            Else

if you will get index length > 1 then your finger has been verified.. :)

Posted 21-Dec-13 0:46am

Nirav Prabtani

Updated 21-Dec-13 0:47am

v2

Comments

Member 10480399 21-Dec-13 7:09am

-nirav , the error is Verification Failure .. i dont know exactly what's happening .. is that solution is compatible with my code?

Nirav Prabtani 21-Dec-13 7:11am

have you installed SDK for that??? and have you got FMD for varification???

Member 10480399 21-Dec-13 7:15am

yes i already installed the SDK ... but that SDK is not connected to a database .. i search for some codes for and i come up with this .. but unfortunately .. when i need to verify and compare the templates that was saved in database the error occurs.. can you please tell me what's wrong with my code?

Nirav Prabtani 21-Dec-13 7:17am

fave you got FMD as a hex string?????? after scanning finger ???

Member 10480399 21-Dec-13 7:21am

excuse me .. but whats FMD?

Nirav Prabtani 21-Dec-13 7:26am

you have to first generate FMD from fingerprint and store it in database .....it is a like hex string

Member 10480399 21-Dec-13 7:39am

i serializing the fingerprint before saving it in database .. was that right?

Nirav Prabtani 21-Dec-13 7:49am

can you post your fingerprint serialize data here??

Member 10480399 · Answer 2 · 2013-12-21T01:56:00

Solution 3

mstream as new IO.MemoryStream
Dim templa8 as DPFP.Temple = new DPFP.Template
templa8.Serialize(mstream)
Dim serializedTemplate as Byte() = mstream.ToArray

Posted 21-Dec-13 1:56am

Member 10480399

Comments

Member 10480399 21-Dec-13 7:58am

this is the code i search and currently using ..