设计一往ACCESS中存储图片的程序,现想对这数据库通过"员工编号"或"员工姓名"字段查询图片值,运行不过,请帮忙,谢谢了!
Private Sub Command1_Click()
Dim StrSQL As String
StrSQL = "select * from 员工照片 where " '//给定义好的字符变量赋予SQL语句
'//判断复选框有一个选中时,则
If Chkcode.Value = 1 Or Chkname.Value = 1 Then
'//判断二个复选框同时选中时,则
If Chkcode.Value = 1 And Chkname.Value = 1 Then
StrSQL = StrSQL & "员工编号= '" & Trim(Textnumber.Text) & "'" & "and" & " 员工姓名 = '" & Trim(Textname.Text) & "'"
'//判断编号与进入公司时间复选框选中时,则
If Chkcode.Value = 1 Then '//只有编号复选框选中时,则
StrSQL = StrSQL & "员工编号= '" & Trim(Textnumber.Text) & "'"
End If
If Chkname.Value = 1 Then '//只有姓名复选框选中时,则
StrSQL = StrSQL & " 员工姓名 = '" & Trim(Textname.Text) & "'"
End If
End If
If rstqueryphoto.State = adStateClosed Then
rstqueryphoto.Open StrSQL, DBCON, adOpenKeyset, adLockOptimistic, adCmdText//当其中一复选框选中再点击查询按钮时,次句被提示错误3709,连接无法用于此操作,在此上下文中可能被关闭或删除.
End If
Set imgPreview.DataSource = rsphoto.DataSource
imgPreview.Refresh '//刷新网格
rsphoto.Close '//关闭记录集
Textnumber.Text = Empty '//请空文本框
Textname.Text = Empty
rsphoto.Close '//关闭记录集
Textnumber.Text = Empty '//请空文本框
Textname.Text = Empty
Else
If rsqueryphoto.State = adStateClosed Then
rsqueryphoto.Open "员工照片", DBCON, adOpenKeyset, adLockOptimistic, adCmdTable//当复选框没有选中再点击查询按钮时,次句也被提示错误3709,连接无法用于此操作,在此上下文中可能被关闭或删除.
End If
Set imgPreview.DataSource = rsphoto.DataSource
End If
End Sub
Private Sub Command1_Click()
Dim StrSQL As String
StrSQL = "select * from 员工照片 where " '//给定义好的字符变量赋予SQL语句
'//判断复选框有一个选中时,则
If Chkcode.Value = 1 Or Chkname.Value = 1 Then
'//判断二个复选框同时选中时,则
If Chkcode.Value = 1 And Chkname.Value = 1 Then
StrSQL = StrSQL & "员工编号= '" & Trim(Textnumber.Text) & "'" & "and" & " 员工姓名 = '" & Trim(Textname.Text) & "'"
'//判断编号与进入公司时间复选框选中时,则
If Chkcode.Value = 1 Then '//只有编号复选框选中时,则
StrSQL = StrSQL & "员工编号= '" & Trim(Textnumber.Text) & "'"
End If
If Chkname.Value = 1 Then '//只有姓名复选框选中时,则
StrSQL = StrSQL & " 员工姓名 = '" & Trim(Textname.Text) & "'"
End If
End If
If rstqueryphoto.State = adStateClosed Then
rstqueryphoto.Open StrSQL, DBCON, adOpenKeyset, adLockOptimistic, adCmdText//当其中一复选框选中再点击查询按钮时,次句被提示错误3709,连接无法用于此操作,在此上下文中可能被关闭或删除.
End If
Set imgPreview.DataSource = rsphoto.DataSource
imgPreview.Refresh '//刷新网格
rsphoto.Close '//关闭记录集
Textnumber.Text = Empty '//请空文本框
Textname.Text = Empty
rsphoto.Close '//关闭记录集
Textnumber.Text = Empty '//请空文本框
Textname.Text = Empty
Else
If rsqueryphoto.State = adStateClosed Then
rsqueryphoto.Open "员工照片", DBCON, adOpenKeyset, adLockOptimistic, adCmdTable//当复选框没有选中再点击查询按钮时,次句也被提示错误3709,连接无法用于此操作,在此上下文中可能被关闭或删除.
End If
Set imgPreview.DataSource = rsphoto.DataSource
End If
End Sub
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