标签:des style blog http color io cti 代码
‘模块代码 Private Declare Function CreateStreamOnHGlobal Lib "ole32" (ByVal hGlobal As Long, ByVal fDeleteOnRelease As Long, ppstm As Any) As Long Private Declare Function OleLoadPicture Lib "olepro32" (pStream As Any, ByVal lSize As Long, ByVal fRunmode As Long, riid As Any, ppvObj As Any) As Long Private Declare Function CLSIDFromString Lib "ole32" (ByVal lpsz As Any, pclsid As Any) As Long Private Declare Function GlobalAlloc Lib "kernel32" (ByVal uFlags As Long, ByVal dwBytes As Long) As Long Private Declare Function GlobalLock Lib "kernel32" (ByVal hMem As Long) As Long Private Declare Function GlobalUnlock Lib "kernel32" (ByVal hMem As Long) As Long Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" (pDest As Any, pSource As Any, ByVal dwLength As Long) Private Declare Function GlobalFree Lib "kernel32" (ByVal hMem As Long) As Long Public Type GUID ‘ 16 bytes (128 bits) ‘dwData1 As Long ‘ 4 bytes ‘wData2 As Integer ‘ 2 bytes ‘wData3 As Integer ‘ 2 bytes abData4(7) As Byte ‘ 8 bytes, zero based End Type Public Function PictureFromByteStream(B() As Byte) As IPicture Dim hMem As Long Dim lpMem As Long Dim LowerBound As Long Dim ByteCount As Long Dim IID_IPicture As GUID Dim istm As stdole.IUnknown LowerBound = LBound(B) ByteCount = UBound(B) - LowerBound + 1 hMem = GlobalAlloc(&H2, ByteCount) If hMem <> 0 Then lpMem = GlobalLock(hMem) If lpMem <> 0 Then MoveMemory ByVal lpMem, B(LowerBound), ByteCount GlobalUnlock hMem If CreateStreamOnHGlobal(hMem, 1, istm) = 0 Then If CLSIDFromString(StrPtr("{7BF80980-BF32-101A-8BBB-00AA00300CAB}"), IID_IPicture) = 0 Then OleLoadPicture ByVal ObjPtr(istm), ByteCount, 0, IID_IPicture, PictureFromByteStream End If End If End If End If End Function
Public Sub Combo1_Click() Dim adoCnn As ADODB.Connection Dim rstOra As ADODB.Recordset Dim intI As Integer Set adoCnn = New ADODB.Connection Set rstOra = New ADODB.Recordset adoCnn.ConnectionString = "Provider=OraOLEDB.Oracle;User ID=dzjc;password=zlkj;Data Source=dzjc_2005;" ‘读blob字段要用Provider=OraOLEDB.Oracle adoCnn.CursorLocation = adUseClient adoCnn.Open rstOra.CursorLocation = adUseClient rstOra.ActiveConnection = adoCnn rstOra.Open "SELECT zp FROM dzjc.dzjc_wfzp WHERE xh = ‘5‘" ‘Set Image1.DataSource = rstOra Set Image1.Picture = PictureFromByteStream(rstOra.Fields("zp").Value) End Sub
(转载)VB 查询Oracle中blob类型字段,并且把blob中的图片以流的方式显示在Image上,布布扣,bubuko.com
(转载)VB 查询Oracle中blob类型字段,并且把blob中的图片以流的方式显示在Image上
标签:des style blog http color io cti 代码
原文地址:http://www.cnblogs.com/lichmama/p/3870043.html