'** 引用 Microsoft ActiveX Data Objects 2.5 Library 及以上版本
‘2.5版本以下不支持Stream对象
Dim iConcstr As String
Dim iConc As ADODB.Connection
'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
'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 + "\test.jpg"
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
'打开表
Set iRe = New ADODB.Recordset
‘得到最新添加的纪录
iRe.Open "select top 1 * from img order by id desc", iConc, adOpenKeyset, adLockReadOnly
'保存到文件
Set iStm = New ADODB.Stream
With iStm
.Mode = adModeReadWrite
.Type = adTypeBinary
.Open
.Write iRe("photo")
‘这里注意了,如果当前目录下存在test1.jpg,会报一个文件写入失败的错误.
.SaveToFile App.Path & "\test1.jpg"
End With
Image1.Picture = LoadPicture(App.Path & "\test1.jpg")
'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
窗体上放:Command1 Command2 Picture1 Picture2 CommonDialog1,表里的字段pic设置为ole类型
------------------------
Dim StrPicTemp As String
Dim rs As New ADODB.Recordset
Dim conn As New ADODB.Connection
Private Sub Command1_Click()
On Error GoTo err
Dim StmPic As ADODB.Stream
'保存你所选择的图像
Set StmPic = New ADODB.Stream
StmPic.Type = adTypeBinary '指定流是二进制类型
CommonDialog1.ShowOpen
Picture1.Picture = LoadPicture(CommonDialog1.FileName)
StmPic.Open '将数据获取到Stream对象中
StmPic.LoadFromFile (CommonDialog1.FileName) '将选择的图像加载到打开的StmPic中
rs.AddNew
rs.Fields("pic").Value = StmPic.Read '从StmPic对象中读取数据
rs.Update
StmPic.Close
Exit Sub
err:
MsgBox err.Description
End Sub
Private Sub Command2_Click()
Dim StmPic As ADODB.Stream
On Error GoTo err
'读取显示数据库中的图像
Set StmPic = New ADODB.Stream
With StmPic
.Type = adTypeBinary
.Open
.Write rs.Fields("pic") '写入数据库中的数据至Stream中
.SaveToFile StrPicTemp, adSaveCreateOverWrite '将Stream中数据写入临时文件中
.Close
End With
Picture2.Picture = LoadPicture(StrPicTemp) '用Picture控件显示图像
Exit Sub
err:
MsgBox err.Description
End Sub
Private Sub Form_Load()
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.path & "\Test.mdb;Jet OLEDB:DataBase password=12345;"
conn.CursorLocation = adUseClient
rs.Open "Table1", conn, 3, adLockOptimistic
End Sub