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BLOB - Retrieve image stored in database

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BLOB - Retieve image stored in database

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  1. Dim CN As New ADODB.Connection
  2. Dim RS As ADODB.Recordset
  3. Dim DataFile As Integer, Fl As Long, Chunks As Integer
  4. Dim Fragment As Integer, Chunk() As Byte, i As Integer, FileName As String
  6. Private Const ChunkSize As Integer = 16384
  7. Private Const conChunkSize = 100
  9. Private Sub Form_Load()
  10.     CN.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=Pubs;Data Source=Test"
  11.     Dim strsql As String
  13.     strsql = "SELECT * FROM pub_info where pub_id = '9999'"
  14.     RS.Open strsql, CN, adOpenForwardOnly, adLockReadOnly
  15.       ShowPic
  16.     Set RS = Nothing
  17.     Set RS = New Recordset
  18. End Sub
  20. Private Sub ShowPic()
  21.     DataFile = 1
  22.     Open "pictemp" For Binary Access Write As DataFile
  23.         Fl = RS!logo.ActualSize ' Length of data in file
  24.         If Fl = 0 Then Close DataFile: Exit Sub
  25.         Chunks = Fl \ ChunkSize
  26.         Fragment = Fl Mod ChunkSize
  27.         ReDim Chunk(Fragment)
  28.         Chunk() = RS!logo.GetChunk(Fragment)
  29.         Put DataFile, , Chunk()
  30.         For i = 1 To Chunks
  31.             ReDim Buffer(ChunkSize)
  32.             Chunk() = RS!logo.GetChunk(ChunkSize)
  33.             Put DataFile, , Chunk()
  34.         Next i
  35.     Close DataFile
  36.     FileName = "pictemp"
  37.     Picture1.Picture = LoadPicture(FileName)
  38. End Sub
Dec 4 '06 #1
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