本文給大家展示一個Visual Basic裡，使用ADO連接Oracle、Access示例及記錄集處理源碼，大家可以參考一下。
Option Explicit
Public Enum RSMethod
VIEW_RECORD [color=#0000ff]= 0
EDIT_RECORD = 1
EXEC_SQL = 2
NEW_RECORD = 3
End Enum
Function dbConnection(strDatabaseType As String, strDBService As String, Optional strUserID As String, Optional strPassword As String) As ADODB.Connection
Dim objDB As New ADODB.Connection
Dim strConnectionString As String
If strDatabaseType = "ORACLE" Then
'定義 orACLE 數據庫連接字符串
strConnectionString = "Driver={Microsoft ODBC Driver For oracle};ConnectString=" & strDBService & ";UID=" & strUserID & ";PWD=" & strPassword & ";"
ElseIf strDatabaseType = "MSACCESS" Then
'定義 Microsoft Access 數據庫連接字符串
strConnectionString = "DBQ=" & strDBService
strConnectionString = "DRIVER={Microsoft Access Driver (*.mdb)}; " & strConnectionString
End If
With objDB
.Mode = adModeReadWrite ' 連接模式 ???
.ConnectionTimeout = 10 '超時
.CommandTimeout = 5
.CursorLocation = adUseClient
.Open strConnectionString '打開數據庫連接
End With
Set dbConnection = objDB
End Function
Function CreateRecordSet(ByRef dbConn As ADODB.Connection, ByRef rs As ADODB.Recordset, ByVal method As RSMethod, Optional strSQL As String, Optional TableName As String) As ADODB.Recordset
' 如果打開應先關閉
' ...
If rs.State=1 Then
rs.close
End If
Select Case method
Case RSMethod.NEW_RECORD
rs.ActiveConnection = dbConn
rs.CursorType = adOpenKeyset
rs.LockType = adLockOptimistic
rs.CursorLocation = adUseServer
rs.Open TableName
Case RSMethod.EDIT_RECORD
rs.ActiveConnection = dbConn
rs.Source = strSQL
rs.CursorType = adOpenKeyset
rs.LockType = adLockOptimistic
rs.CursorLocation = adUseClient
rs.Open
' Debug.Print "SQL Statement in EDIT Mod
' e (Createrecordset) : " & strSQL
' Debug.Print "Found " & rs.RecordCount
' & " records"
Case RSMethod.VIEW_RECORD
rs.ActiveConnection = dbConn 'dbConnection 'dbConn
rs.Source = strSQL
rs.CursorType = adOpenForwardOnly
rs.CursorLocation = adUseClient
rs.Open
' Debug.Print "Found " & rs.RecordCount
' & " records"
rs.ActiveConnection = Nothing
Case RSMethod.EXEC_SQL
Set rs = dbConn.Execute(strSQL)
End Select
Set CreateRecordSet = rs
End Function
'======================================
'模塊結束
'======================================
'=======================================
'======================================
'調用示例...
'======================================
Sub Add_New_Record()
Dim objRecSet As New ADODB.Recordset
Dim objConn As New ADODB.Connection
Dim strUserID As String
Dim strPassword As String
Dim strTableName As String
Dim strDBType As String
Dim strDBName As String
strTableName = "你的表名稱"
strPassword = "密碼"
strUserID = "帳號"
If strDBType = "MSACCESS" Then
' strDBName 是數據庫名稱
strDBName = App.Path & "\YourAccessDB.mdb"
ElseIf strDBType = "ORACLE" Then
' strDBName 是Oracle 服務器名稱
strDBName = "你的Oracle 服務器名稱"
strTableName = strUserID & "." & strTableName
'Table name format ::> USERID.TABLENA
' ME
Else
MsgBox "Database is other than orACLE or Microsoft"
Exit Sub
End If
Set objConn = dbConnection(strDBType, strDBName, "userid", "password")
'send NEW_RECORD and strTableName as a p
' art of parameters
Set objRecSet = CreateRecordSet(objConn, objRecSet, NEW_RECORD, , strTableName)
objConn.BeginTrans
With objRecSet
.AddNew
.Fields("FIELD1").Value = "your value1"
.Fields("FIELD2").Value = "your value2"
.Fields("FIELD3").Value = "your value3"
.Fields("FIELD4").Value = "your value4"
.Fields("FIELD5").Value = "your value5"
.Update
End With
If objConn.Errors.Count = 0 Then
objConn.CommitTrans
Else
objConn.RollbackTrans
End If
objRecSet.Close
objConn.Close
Set objRecSet = Nothing
Set objConn = Nothing
End Sub
Sub View_Record_Only()
Dim strSQL As String
Dim strDBName As String
Dim strDBType As String
Dim strUserID As String
Dim strPassword As String
Dim objRecSet As New ADODB.Recordset
Dim objConn As New ADODB.Connection
If strDBType = "MSACCESS" Then
' strDBName is your Database Name
strDBName = App.Path & "\YourAccessDB.mdb"
ElseIf strDBType = "ORACLE" Then
' strDBName is your oracle Service Name
strDBName = "YOUR_ORACLE_SERVICE_NAME"
Else
MsgBox "Database is other than orACLE or Microsoft"
Exit Sub
End If
strPassword = "YourPassword"
strUserID = "YourUserID"
strSQL = "Select * from USER_TABLE"
Set objConn = dbConnection(strDBType, strDBName, "userid", "password")
'create a disconnected recordset
Set objRecSet = CreateRecordSet(objConn, objRecSet, VIEW_RECORD, strSQL)
objConn.Close
Set objConn = Nothing
'manipulate the recordset here.....
'manipulate the recordset here.....
'manipulate the recordset here.....
objRecSet.Close
Set objRecSet = Nothing
End Sub
Sub Edit_Existing_Record()
Dim objRecSet As New ADODB.Recordset
Dim objConn As New ADODB.Connection
Dim strUserID As String
Dim strPassword As String
Dim strSQL As String
Dim strDBType As String
Dim strDBName As String
strTableName = "YOURTABLE"
strPassword = "YourPassword"
strUserID = "YourUserID"
If strDBType = "MSACCESS" Then
' strDBName is your Database Name
strDBName = App.Path & "\YourAccessDB.mdb"
ElseIf strDBType = "ORACLE" Then
' strDBName is your oracle Service Name
strDBName = "YOUR_ORACLE_SERVICE_NAME"
Else
MsgBox "Database is other than orACLE or Microsoft"
Exit Sub
End If
strSQL = "Select * from YOUR_TABLE"
Set objConn = dbConnection(strDBType, strDBName, "userid", "password")
'send EDIT_RECORD and strSQL as a part o
' f parameters
Set objRecSet = CreateRecordSet(objConn, objRecSet, EDIT_RECORD, strSQL)
With objRecSet
.Fields("FIELD1").Value = "your value1"
.Update
End With
objRecSet.Close
objConn.Close
Set objRecSet = Nothing
Set objConn = Nothing
End Sub
