vb6如何读oracle,vb怎么念

vb6.0 连接oracle 数据库

'Ctrl+t找Microsoft DataGrid Control....

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'菜单"工程"-"引用" 找 Microsoft ActiveX Data Object....

Dim cn As New ADODB.Connection

Dim rst As New ADODB.Recordset

Dim SqlStr As String

cn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=MyOracleDB;User Id=myUsername;Password=myPassword;Integrated Security=no;"

SqlStr = "Select * From 某个表"

rst.CursorLocation = adUseClient

rst.Open SqlStr, cn, adOpenDynamic, adLockOptimistic, adCmdText '打开记录集

Set DataGrid1.DataSource = rst '给DataGrid修改数据源

在VB6.0中如何连接Oracle数据库表，请教大牛们了

老问题了，随便上网就找得到，

以下供参考,转自ccid。

首先要安装ORACLE客户端或服务器端,建好DB以及SERVICE,连接成功后就可以开始了,以下是VB访问ORACLE的代码:

Option Explicit

'以下是一些变量以及参数的定义

'DB的名称

Public Const strdbname = "DBNAME"

'用户名

Public Const strusr = "BLUESKY35"

'密码

Public Const strpwd = "PASSWORD"

'OraSession

Public OraSession As Object

'OraDatabase

Public OraDB As OraDatabase

'OraDynaset

Public OraDyn As OraDynaset

'连接ORACLE的函数

'连接成功:true 连接失败:false

Public Function f_connect() As Boolean

On Error GoTo ierr

f_connect = False

Set OraSession = CreateObject("OracleInProcServer.XOraSession")

Set OraDB = OraSession.OpenDatabase(strdbname, strusr "/" strpwd, 0)

f_connect = True

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

f_connect = False

End Function

'通过传入SQL语句从数据库的表里取得记录

Public Function f_select(strsql As String) As OraDynaset

On Error GoTo ierr

Set OraDyn = OraDB.CreateDynaset(strsql, ORADYN_READONLY)

Set f_select = OraDyn

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

Set f_select = Nothing

End Function

'执行更新语句,返回受本次更新影响的记录数

Public Function f_execute(strsql As String) As Boolean

On Error GoTo ierr

f_execute = False

OraDB.BeginTrans

f_execute = OraDB.ExecuteSQL(strsql)

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

OraDB.Rollback

End Function

'断开连接

'断开成功:true 断开失败:false

Public Function f_disconnect() As Boolean

On Error GoTo ierr

f_disconnect = False

If Not OraDyn Is Nothing Then

OraDyn.Close

End If

Set OraSession = Nothing

OraDB.Close

Set OraDB = Nothing

f_disconnect = True

Exit Function

ierr:

MsgBox Err.Description, vbOKOnly + vbCritical, "Error"

f_disconnect = False

End Function

将以上代码放入模块,直接调用即可.

win8专业版64位安装vb6.0连接oracle10g数据库的问题

这个问题，很多人反应过，应该是win8不支持vb6.

如果你的电脑很好的话，你可以装个虚拟机vmare软件，里面装xp和vb6（相当于一台已启动的电脑）。现在很多人用虚拟机软件，很好用。

VB6 怎么连接 Oracle10g 64位？？

把vb安装后的文件，从C:\Program Files(x86)拷贝到C:\Program Files，

执行C:\Program Files里的vb，这样调试的时候能连接oracle。

ps：vb安装在C:\Program Files(x86)，编译后的程序能执行，只是调试受影响，安装vb时只能在Program Files(x86)里，不能修改。

oracle的CLOB字段，怎么用VB6来读写

Option Explicit

Public rn As ADODB.Connection

Public Function CreateDataSource(DataSource As String, UserID As String, Password As String) As Boolean

On Error GoTo DbConErr:

Set rn = New ADODB.Connection

With rn

.ConnectionString = "Provider=OraOLEDB.Oracle.1; password=TEST ;User ID = TEST;Data Source=DEV;Locale Identifier=2052"

.Open

End With

CreateDataSource = True

Exit Function

DbConErr:

CreateDataSource = False

End Function

Sub BlobToFile(fld As ADODB.Field, filename As String, Optional ChunkSize As Long = 8192)

Dim fnum As Integer, bytesleft As Long, bytes As Long

Dim tmp() As Byte

If (fld.Attributes And adFldLong) = 0 Then

Err.Raise 1001, , "field doesn't support the GetChunk method."

End If

If Dir$(filename) "" Then Kill filename

fnum = FreeFile

Open filename For Binary As fnum

bytesleft = fld.ActualSize

Do While bytesleft

bytes = bytesleft

If bytes ChunkSize Then bytes = ChunkSize

tmp = fld.GetChunk(bytes)

Put #fnum, , tmp

bytesleft = bytesleft - bytes

Loop

Close #fnum

End Sub

Sub FileToBlob(fld As ADODB.Field, filename As String, Optional ChunkSize As Long = 8192)

Dim fnum As Integer, bytesleft As Long, bytes As Long

Dim tmp() As Byte

If (fld.Attributes And adFldLong) = 0 Then

Err.Raise 1001, , "field doesn't support the GetChunk method."

End If

If Dir$(filename) = "" Then Err.Raise 53, , "File not found"

fnum = FreeFile

Open filename For Binary As fnum

bytesleft = LOF(fnum)

Do While bytesleft

bytes = bytesleft

If bytes ChunkSize Then bytes = ChunkSize

ReDim tmp(1 To bytes) As Byte

Get fnum, , tmp

fld.AppendChunk tmp

bytesleft = bytesleft - bytes

Loop

Close #fnum

End Sub

Private Sub cmdread_Click()

Dim rs As New ADODB.Recordset

rs.ActiveConnection = rn

rs.LockType = adLockOptimistic

rs.CursorLocation = adUseClient

rs.Source = "select * from t_demo"

rs.Open

comDlgDir.DialogTitle = "保存文件"

comDlgDir.Filter = "*.*"

comDlgDir.ShowSave

Call BlobToFile(rs.Fields("text"), comDlgDir.filename)

Set rs = Nothing

Exit Sub

Set rs = Nothing

End Sub

Private Sub cmdsave_Click()

Dim rs As New ADODB.Recordset

rs.ActiveConnection = rn

rs.LockType = adLockOptimistic

rs.CursorLocation = adUseClient

rs.Source = "select * from t_demo"

rs.Open

rs.AddNew

comDlgDir.DialogTitle = "选取文件"

comDlgDir.ShowOpen

rs.Fields("id").Value = 1

If comDlgDir.filename "" Then

Call FileToBlob(rs.Fields("text"), comDlgDir.filename)

rs.Update

End If

Set rs = Nothing

Exit Sub

Set rs = Nothing

End Sub

Private Sub Form_Load()

If Not CreateDataSource("DEV", "TEST", "TEST") Then

MsgBox "Connection failure!"

End If

End Sub

请教vb如何连接oracle数据库

VB6.0可通过Adodc数据访问控件的属性页进行连接Oracle数据库。

1）建立数据工程，在窗体添加Adodc数据访问控件。鼠标选中Adodc控件-右键-Adodc属性-使用连接字符串-生成。

2）选Microsoft OLE DB Provider For Oracle，下一步。

3）根据数据链接属性对话框填写所需内容，测试连接。点确定，最终在Adodc属性页获得连接字符串，复制该字符串，即可作为Adodc数据访问控件直接使用，或在代码中用于Adodc控件或ADO数据访问对象。

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