关于图片存储问题

[zhxzheng]

大家好 我在sqlserver 中存放图片 读取速度慢 这个有什么好办法没？？？

[饮水需思源]

使用流对象保存和显示图片
打开vb6,新建工程。

添加两个按钮,一个image控件
注意:Access中的photo字段类型为OLE对象.
SqlServer中的photo字段类型为Image

'** 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


Private Sub Form_Load()
'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\access图片\img.mdb"

‘下面的语句是连接sqlserver数据库的.
‘iConcstr = "Provider=SQLOLEDB.1;Persist Security Info=True;" & _
‘ "User ID=sa;Password=;Initial Catalog=test;Data Source=yang"


Set iConc = New ADODB.Connection
iConc.Open iConcstr
End Sub


Private Sub Form_Unload(Cancel As Integer)
iConc.Close
Set iConc = Nothing
End Sub

[zhxzheng]

你好 我现在就是用的这个模式 可以加我QQ吗 谢谢你

[zhxzheng]

1097328114

[feiyun0112]

只存路径，不存文件

*****************************************************************************
欢迎使用CSDN论坛专用阅读器 : CSDN Reader(附全部源代码)

http://feiyun0112.cnblogs.com/

[zhxzheng]

不存放图片不可以啊 是在局域网内

[贝隆]

Option Explicit
Dim cnnP As ADODB.Connection
Dim adoP As ADODB.Recordset
Dim mstP As ADODB.Stream
Dim strBMPFile As String

Private Sub Command1_Click()
Set cnnP = New ADODB.Connection
cnnP.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\db1.mdb" & ";"
Set adoP = New ADODB.Recordset
adoP.Open "Select * From TB_BMP", cnnP, adOpenKeyset, adLockOptimistic
Set mstP = New ADODB.Stream
mstP.Type = adTypeBinary
mstP.Open
mstP.Position = 0
mstP.Write adoP!FD_BMP
' Debug.Print adoP!FD_BMP
mstP.SaveToFile App.Path & "\1.bmp", adSaveCreateOverWrite
Picture1.Picture = LoadPicture(App.Path & "\1.bmp")
adoP.Close
cnnP.Close
End Sub

Private Sub Form_Load()
Set cnnP = New ADODB.Connection
cnnP.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\db1.mdb" & ";"
Set adoP = New ADODB.Recordset
adoP.Open "Select * From TB_BMP", cnnP, adOpenKeyset, adLockOptimistic
Set mstP = New ADODB.Stream
mstP.Type = adTypeBinary
mstP.Open
With cdlP
.DialogTitle = "选取要存入的图片"
.InitDir = App.Path
.Filter = "位图文件 (*.bmp)|*.bmp"
.ShowOpen
strBMPFile = .FileName
End With
If strBMPFile = "" Then Exit Sub
mstP.LoadFromFile strBMPFile
adoP.AddNew
adoP.Fields("FD_BMP").Value = mstP.Read
adoP.Update
adoP.Close
cnnP.Close
End Sub