在數據庫中存取文件'*************************************************
  '**
  '** 使用 ADODB.Stream 保存/讀取文件到數據庫
  '** 引用 Microsoft ActiveX Data Objects 2.5 Library 及以上版本
  '**
  '** ----- 數據庫連接字符串模板 ---------------------------------------
  '** ACCESS數據庫
  '** iConcStr = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False" & _
  '**     ";Data Source=數據庫名"
  '**
  '** SQL數據庫
  '** iConcStr = "Provider=SQLOLEDB.1;Persist Security Info=True;" & _
  '**     "User ID=用戶名;Password=密碼;Initial Catalog=數據庫名;Data Source=SQL服務器名"
  '**
  '*************************************************
  '
  '保存文件到數據庫中
  Sub s_SaveFile()
    Dim iStm As ADODB.Stream
    Dim iRe As ADODB.Recordset
    Dim iConcStr As String
   
    '數據庫連接字符串
    iConcStr = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False" & _
        ";Data Source=F:\My Documents\客戶資料1.mdb"
   
    '讀取文件到內容
    Set iStm = New ADODB.Stream
    With iStm
        .Type = adTypeBinary    '二進制模式
        .Open
        .LoadFromFile "c:\test.doc"
    End With
   
    '打開保存文件的表
    Set iRe = New ADODB.Recordset
    With iRe
        .Open "表", iConc, adOpenKeyset, adLockOptimistic
        .AddNew         '新增一條記錄
        .Fields("保存文件內容的字段") = iStm.Read
        .Update
    End With
   
    '完成后關閉對象
    iRe.Close
    iStm.Close
  End Sub
  '從數據庫中讀取數據,保存成文件
  Sub s_ReadFile()
    Dim iStm As ADODB.Stream
    Dim iRe As ADODB.Recordset
    Dim iConc As String
   
    '數據庫連接字符串
    iConc = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False" & _
        ";Data Source=\\xz\c$\Inetpub\zj\zj\zj.mdb"
   
    '打開表
    Set iRe = New ADODB.Recordset
    iRe.Open "tb_img", iConc, adOpenKeyset, adLockReadOnly
    iRe.Filter = "id=64"
   
    '保存到文件
    Set iStm = New ADODB.Stream
    With iStm
        .Mode = adModeReadWrite
        .Type = adTypeBinary
        .Open
        .Write iRe("img")
        .SaveToFile "c:\test.doc"
    End With
   
    '關閉對象
    iRe.Close
    iStm.Close
  End Sub