如何在 Access 2003 和 Access 2002 中创建 DSN 的连接到(2)


        stConnect = "ODBC;DRIVER=SQL Server;SERVER=" & stServer & ";DATABASE=" & stDatabase & ";UID=" & stUsername & ";PWD=" & stPassword
    End If
    Set td = CurrentDb.CreateTableDef(stLocalTableName, dbAttachSavePWD, stRemoteTableName, stConnect)
    CurrentDb.TableDefs.Append td
    AttachDSNLessTable = True
    Exit Function

AttachDSNLessTable_Err:

    AttachDSNLessTable = False
    MsgBox "AttachDSNLessTable encountered an unexpected error: " & Err.Description

End Function


若要调用 AttachDSNLessTable 函数, 请代码, 它类似于之一以下代码示例在 Autoexec 宏中或启动窗体 Form_Open 事件中:
当您使用 Autoexec, 调用 AttachDSNLessTable 函数, 并然后传递参数, 如以下所示从 RunCode 操作。
  AttachDSNLessTable ("authors", "authors", "(local)", "pubs", "", "")
当您使用启动窗体, 将代码, 它类似于以下以 Form_Open 事件。
Private Sub Form_Open(Cancel As Integer)
  If AttachDSNLessTable("authors", "authors", "(local)", "pubs", "", "") Then
    '// All is okay.
  Else
    '// Not okay.
  End If
End Sub
向 Access 数据库添加多个链接表时 注意 您必须调整编程逻辑。
 

方法 2: 使用 DAO.RegisterDatabase 方法

DAO.RegisterDatabase 方法可在 Autoexec 宏中或启动表单中创建 DSN 连接。 尽管此方法不删除对 DSN 连接, 要求它不帮助您通过代码中创建 DSN 连接解决问题。 若要使用此方法, 创建一个新模块, 然后以下 CreateDSNConnection 函数添加到新模块。
'//Name   :  CreateDSNConnection
'//Purpose :  Create a DSN to link tables to SQL Server
'//Parameters
'//   stServer: Name of SQL Server that you are linking to
'//   stDatabase: Name of the SQL Server database that you are linking to
'//   stUsername: Name of the SQL Server user who can connect to SQL Server, leave blank to use a Trusted Connection
'//   stPassword: SQL Server user password
Function CreateDSNConnection(stServer As String, stDatabase As String, Optional stUsername As String, Optional stPassword As String) As Boolean
  On Error GoTo CreateDSNConnection_Err

  Dim stConnect As String
  
  If Len(stUsername) = 0 Then
    '//Use trusted authentication if stUsername is not supplied.
    stConnect = "Description=myDSN" & vbCr & "SERVER=" & stServer & vbCr & "DATABASE=" & stDatabase & vbCr & "Trusted_Connection=Yes"
  Else
    stConnect = "Description=myDSN" & vbCr & "SERVER=" & stServer & vbCr & "DATABASE=" & stDatabase & vbCr 
  End If
  
  DBEngine.RegisterDatabase "myDSN", "SQL Server", True, stConnect
    
  '// Add error checking.
  CreateDSNConnection = True
  Exit Function
CreateDSNConnection_Err:
  
  CreateDSNConnection = False
  MsgBox "CreateDSNConnection encountered an unexpected error: " & Err.Description
  
End Function