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Public Sub ReadfromBLOB(filed As ADODB.Field, Filen As String)
Dim DataFile As Integer, Fl As Long, Chunks As Integer
Dim Fragment As Integer, Chunk() As Byte, i As Integer
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Const ChunkSize As Integer = 16384
Dim MediaTemp As String
Dim lngOffset As Long
Dim lngTotalSize As Long
Dim strChunk As String
Dim MediaID As Long
On Error Resume Next
DataFile = FreeFile
Open Filen For Binary Access Write As DataFile
lngTotalSize = filed.ActualSize
Chunks = lngTotalSize \ ChunkSize
Fragment = lngTotalSize Mod ChunkSize
'ReDim Chunk(ChunkSize)
ReDim Chunk(Fragment)
Chunk() = filed.GetChunk(ChunkSize)
Put DataFile, , Chunk()
lngOffset = lngOffset + ChunkSize
Do While lngOffset < lngTotalSize
Chunk() = filed.GetChunk(ChunkSize)
Put DataFile, , Chunk()
lngOffset = lngOffset + ChunkSize
Loop
Close DataFile
End Sub
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Public Sub SaveToBLOB(fieldBLOB As ADODB.Field, filename As String)
Dim DataFile As Integer, Fl As Long, Chunks As Integer
Dim Fragment As Integer, Chunk() As Byte, i As Integer
'´«ËͿ鵥λ´óС
Const ChunkSize As Integer = 16384
Dim MediaTemp As String
Dim lngOffset As Long
Dim lngTotalSize As Long
Dim strChunk As String
Dim MediaID As Long
DataFile = FreeFile
Open filename For Binary Access Read As DataFile
Fl = LOF(DataFile) ' ÎļþÖÐÊý¾Ý³¤¶È
If Fl = 0 Then
Close DataFile
Else
Chunks = Fl \ ChunkSize
Fragment = Fl Mod ChunkSize
'If Chunks <= 0 Then Chunks = 1
ReDim Chunk(Fragment)
Get DataFile, , Chunk()
fieldBLOB.AppendChunk Chunk()
ReDim Chunk(ChunkSize)
For i = 1 To Chunks
Get DataFile, , Chunk()
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Private Sub Form_load()
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If App.PrevInstance
Then
MsgBox "±¾³ÌÐòÒѾÔËÐУ¡", vbInformation Or vbOKOnly, "ÌáʾÐÅÏ¢"
Unload
Me
Exit Sub
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