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Menyimpan Dan Menampilkan Foto Di Ms Access

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Disini saya tidak akan menjelaskan bagaimana melakukan koneksi ke database access, intinya aplikasi Anda sudah siap menjalankan perintah SELECT, INSERT, UPDATE, dan DELETE. Jika Anda masih kesulitan bisa dilihat disini.

Untuk kasus disini kita akan menyimpan data mahasiswa dengan tiga field saja, lihat gambar berikut :

Khusus untuk field foto tipe yang dipilih adalah OLE Object, kita langsung aja copy paste kode berikut di module :

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Option Explicit

Public Const CHUNK_SIZE     As Long = 16384

Dim rsImage                 As ADODB.Recordset

Dim i                       As Long
Dim lsize                   As Long
Dim iChunks                 As Long
Dim nFragmentOffset         As Long
Dim lchunks                 As Long

Dim nHandle                 As Integer
Dim varChunk()              As Byte

Public Function fileExists(ByVal strNamaFile As String) As Boolean
    If Not (Len(strNamaFile) > 0) Then fileExists = False: Exit Function

    If Dir$(strNamaFile, vbNormal) = "" Then
        fileExists = False
    Else
        fileExists = True
    End If
End Function

Public Sub closeRecordset(ByVal vRs As ADODB.Recordset)
    On Error Resume Next

    If Not (vRs Is Nothing) Then
        If vRs.State = adStateOpen Then
            vRs.Close
            Set vRs = Nothing
        End If
    End If
End Sub

Public Function addImageToDB(ByVal query As String, ByVal imageName As String, ByVal imageField As String) As Boolean
    On Error GoTo errHandle

    Set rsImage = New ADODB.Recordset
    rsImage.Open query, conn, adOpenKeyset, adLockOptimistic
    If Not rsImage.EOF Then
        nHandle = FreeFile
        Open imageName For Binary Access Read As nHandle
        lsize = LOF(nHandle)
        If nHandle = 0 Then Close nHandle

        lchunks = lsize / CHUNK_SIZE
        nFragmentOffset = lsize Mod CHUNK_SIZE

        ReDim varChunk(nFragmentOffset)
        Get nHandle, , varChunk()
        rsImage(imageField).AppendChunk varChunk()

        ReDim varChunk(CHUNK_SIZE)
        For i = 1 To lchunks
            Get nHandle, , varChunk()
            rsImage(imageField).AppendChunk varChunk()
            DoEvents
        Next
        rsImage.Update
    End If
    Call closeRecordset(rsImage)

    addImageToDB = True

    Exit Function
errHandle:
    addImageToDB = False
End Function

Public Function getImageFromDB(ByVal query As String) As IPictureDisp
    Dim sFile           As String

    On Error GoTo errHandle

    Set rsImage = New ADODB.Recordset
    rsImage.Open query, conn, adOpenForwardOnly, adLockReadOnly
    If Not rsImage.EOF Then
        If Not IsNull(rsImage(0).Value) Then
            nHandle = FreeFile

            sFile = App.Path & "\output.bin"
            If fileExists(sFile) Then Kill sFile
            DoEvents

            Open sFile For Binary Access Write As nHandle

            lsize = rsImage(0).ActualSize
            iChunks = lsize \ CHUNK_SIZE
            nFragmentOffset = lsize Mod CHUNK_SIZE

            varChunk() = rsImage(0).GetChunk(nFragmentOffset)
            Put nHandle, , varChunk()
            For i = 1 To iChunks
                 ReDim varChunk(CHUNK_SIZE) As Byte

                 varChunk() = rsImage(0).GetChunk(CHUNK_SIZE)
                 Put nHandle, , varChunk()
                 DoEvents
            Next
            Close nHandle

            Set getImageFromDB = LoadPicture(sFile, , vbLPColor)

        Else
            Set getImageFromDB = Nothing
        End If

    Else
        Set getImageFromDB = Nothing
    End If
    Call closeRecordset(rsImage)

    Exit Function
errHandle:
    Set getImageFromDB = Nothing
End Function

Untuk di form cukup dengan kode sederhana berikut :

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Private Sub cmdSimpan_Click()
    'untuk format gambar bisa JPG atau BMP
    strSql = "INSERT INTO mhs (nim, nama) VALUES ('" & txtNIM.Text & "', '" & txtNama.Text & "')"
    conn.Execute strSql

    If fileExists(txtLokasiFoto.Text) Then
        strSql = "SELECT nim, foto FROM mhs WHERE nim = '" & txtNIM.Text & "'"
        If Not addImageToDB(strSql, txtLokasiFoto.Text, "foto") Then MsgBox "Foto mahasiswa gagal disimpan !"
    End If
End Sub

Private Sub cmdTampil_Click()
    strSql = "SELECT foto FROM mhs WHERE nim = '" & txtNIM.Text & "'"
    Set picMhs.Picture = getImageFromDB(strSql)
End Sub

Selamat mencoba :)

visual basic

Tentang Penulis

Software developer yang fokus mengembangkan aplikasi di atas platform .NET (Desktop, ASP.NET MVC, Web Service) dan Android. Senang mempelajari teknologi baru terutama di bidang OOP, Design Pattern, ORM, Database dan Continuous Integration & Deployment.
Saat ini bekerja sebagai staf IT di salah satu PTS di Yogyakarta sebagai senior software developer. Di waktu luang insya Alloh akan terus berbagi pengalaman di blog ini :)

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