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
mdb数据库可以存储照片的,通过字段显示。 找点数据库的书来看看,在这里还真说不清楚!
那照片也可以用RECOEDSET来直接显示出来吗?? 数据类型 IMAGE 当我通过SQL MANAGEMENT STUDIO 查看该表时,只显示二进制数据,不能查看哦...不知道怎么输入的... 我买的书上没有该内容的叙述,谁能贴点资料吗?谢谢了..
额~~~我电脑上有个例子是存储的是 相片路径..是2进制数据..不知道是什么东西...
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
找点数据库的书来看看,在这里还真说不清楚!
数据类型 IMAGE 当我通过SQL MANAGEMENT STUDIO 查看该表时,只显示二进制数据,不能查看哦...不知道怎么输入的...
我买的书上没有该内容的叙述,谁能贴点资料吗?谢谢了..
比如...FIRST...SECOND...THEN...LAST...OVER...