Option ExplicitDim cn As New ADODB.Connection, rs As New ADODB.Recordset'保存 Private Sub Command1_Click() Dim bteContent() As Byte
Open "C:\aa.bmp" For Binary Access Read As #1 bteContent = InputB(LOF(1), #1) Close #1
If rs.State = adStateOpen Then rs.Close rs.Open "select * from tablename", cn, adOpenDynamic, adLockPessimistic rs.AddNew rs!Name = "张三" rs!AGE = 22 rs!SEX = "男" rs.Fields("PHOTO").AppendChunk bteContent rs.Update
Erase bteContent End Sub'打开 Private Sub Command2_Click() Dim bteContent() As Byte If rs.State = adStateOpen Then rs.Close rs.Open "select * from tablename", cn, adOpenForwardOnly, adLockReadOnly bteContent = rs.Fields("PHOTO").GetChunk(rs.Fields("PHOTO").ActualSize) Open "C:\aa.bmp" For Binary Access Write As #1 Put #1, , bteContent Close #1 Image1.Picture = LoadPicture("C:\aa.bmp") End SubPrivate Sub Form_Load() On Error GoTo Errhandle cn.ConnectionString = "Driver={SQL Server};SERVER=DataServer;DATABASE=zxzx;UID=information;PWD=information*&#" cn.Open
Exit Sub Errhandle: MsgBox Err.Description, vbExclamation End SubPrivate Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer) On Error Resume Next rs.Close Set rs = Nothing cn.Close Set cn = Nothing End Sub
我想 set image1.datasource=rs image1.datafeild="PHOTO" 不会比上面的慢吧
使用流对象要比文件读写快一些'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 SubSub s_ReadFile() Dim iStm As ADODB.Stream Dim iRe As ADODB.Recordset Dim iConc As String
Private Sub Command1_Click()
Dim bteContent() As Byte
Open "C:\aa.bmp" For Binary Access Read As #1
bteContent = InputB(LOF(1), #1)
Close #1
If rs.State = adStateOpen Then rs.Close
rs.Open "select * from tablename", cn, adOpenDynamic, adLockPessimistic
rs.AddNew
rs!Name = "张三"
rs!AGE = 22
rs!SEX = "男"
rs.Fields("PHOTO").AppendChunk bteContent
rs.Update
Erase bteContent
End Sub'打开
Private Sub Command2_Click()
Dim bteContent() As Byte
If rs.State = adStateOpen Then rs.Close
rs.Open "select * from tablename", cn, adOpenForwardOnly, adLockReadOnly
bteContent = rs.Fields("PHOTO").GetChunk(rs.Fields("PHOTO").ActualSize) Open "C:\aa.bmp" For Binary Access Write As #1
Put #1, , bteContent
Close #1
Image1.Picture = LoadPicture("C:\aa.bmp")
End SubPrivate Sub Form_Load()
On Error GoTo Errhandle
cn.ConnectionString = "Driver={SQL Server};SERVER=DataServer;DATABASE=zxzx;UID=information;PWD=information*&#"
cn.Open
Exit Sub
Errhandle:
MsgBox Err.Description, vbExclamation
End SubPrivate Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
On Error Resume Next
rs.Close
Set rs = Nothing
cn.Close
Set cn = Nothing
End Sub
set image1.datasource=rs
image1.datafeild="PHOTO"
不会比上面的慢吧
'**
'** 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 SubSub 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 SubPrivate Sub Command1_Click()
Call s_ReadFile
End SubPrivate Sub Command2_Click()
Call s_SaveFile
End Sub
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