能不能把视频文件隐藏在数据库里？？

[laconic]

比如有个avi文件，把它存在数据库中，只有通过访问数据库才可以读取，使别人无法在文件夹下用播放器打开。该如何实现？？？

[hudan]

[laconic]

[binghgo]

是可以的
用ADO直接读取出

[online]

'http://support.microsoft.com/default.aspx?scid=kb;EN-US;258038

'*************************************************************************
'**
'** 使用 ADODB.Stream 保存/读取文件到数据库
'** 引用 Microsoft ActiveX Data Objects 2.5 Library 及以上版本
'**
'** ----- 数据库连接字符串模板 ---------------------------------------
'** ACCESS数据库
'** iConcStr = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False" & _
'** ";Data Source=数据库名"
'**
'** SQL数据库
'** iConcStr = "Provider=SQLOLEDB.1;Persist Security Info=True;" & _
'** "User ID=用户名;Password=密码;Initial Catalog=数据库名;Data Source=SQL服务器名"
'**

'保存文件到数据库中
Sub s_SaveFile()
Dim iStm As ADODB.Stream
Dim iRe As ADODB.Recordset
Dim iConcStr As String

'数据库连接字符串
iConcStr = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False" & _
";Data Source=F:\csdn_vb\database\保存图片\img.mdb"
Dim iConc As ADODB.Connection
Set iConc = New ADODB.Connection

iConc.Open iConcStr
'读取文件到内容
Set iStm = New ADODB.Stream
With iStm
.Type = adTypeBinary '二进制模式
.Open
.LoadFromFile App.Path + "\com.doc"
End With

'打开保存文件的表
Set iRe = New ADODB.Recordset
With iRe
.Open "select * from img", iConc, 1, 3
.AddNew '新增一条记录
.Fields("photo") = iStm.Read
.Update
End With

'完成后关闭对象
iRe.Close
iStm.Close
End Sub

Sub s_ReadFile()
Dim iStm As ADODB.Stream
Dim iRe As ADODB.Recordset
Dim iConc As String

'数据库连接字符串
iConc = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False" & _
";Data Source=F:\csdn_vb\database\保存图片\img.mdb"

'打开表
Set iRe = New ADODB.Recordset
iRe.Open "img", iConc, adOpenKeyset, adLockReadOnly
iRe.Filter = "id=3" '比如单击datagrid后找到id=3的纪录

'保存到文件
Set iStm = New ADODB.Stream
With iStm
.Mode = adModeReadWrite
.Type = adTypeBinary
.Open
.Write iRe("photo")
.SaveToFile "c:\com.doc"
End With

OLE1.SourceDoc = "c:\\com.doc"
OLE1.Action = 1 'use the old action method
OLE1.SizeMode = vbOLESizeAuttoSize '调节对象大小使其正好充满OLE容器控件

'Picture1.Picture = LoadPicture("c:\tesd.bmp")

'关闭对象
iRe.Close
iStm.Close
End Sub



Private Sub Command1_Click()
Call s_ReadFile
End Sub

Private Sub Command2_Click()
Call s_SaveFile
End Sub