SQL server使用VB6的动态DSN

Question

我想在VB6应用程序中创建动态DSN。我已经在我的模块中尝试了以下代码。使用以下Microsoft链接-http://support.microsoft.com/kb/171146.

我的代码在这里-

Private Declare Function SQLConfigDataSource Lib "ODBCCP32.DLL" _
          (ByVal hwndParent As Long, ByVal fRequest As Long, _
          ByVal lpszDriver As String, ByVal lpszAttributes As String) _
          As Long
Public Function PrepareDSN(strServerName As String, strDBName As String, strDSN As String, strDBUser As String, strDBUserPassword As String) As Boolean
On Error GoTo error_hdl
Dim boolError As Boolean
Dim strDSNString As String
PrepareDSN = False
strDSNString = Space(MAX_BUFFER_SIZE)
strDSNString = ""
strDSNString = strDSNString & "DSN=" & strDSN & Chr(0)
strDSNString = strDSNString & "DESCRIPTION=" & "DSN Created Dynamically On " & CStr(Now) & Chr(0)
strDSNString = strDSNString & "Server=" & strServerName & Chr(0)
strDSNString = strDSNString & "DATABASE=" & strDBName & Chr(0)
strDSNString = strDSNString & Chr(0)

 If Not CBool(SQLConfigDataSource(0, _
                        ODBC_ADD_DSN, _
                        ODBCDriverDescription, _
                        strDSNString)) Then
    boolError = True
    MsgBox ("Error in PrepareDSN::SQLConfigDataSource")

  End If
If boolError Then
    Exit Function
End If
PrepareDSN = True
Exit Function
error_hdl:
    MsgBox "PrepareDSN_ErrHandler::" & err.Description
End Function

这里我的函数"SQLConfigDataSource"总是返回false。请提出建议。

Answer 1

缺少两件事。

1） 您没有定义请求类型ODBC_ADD_DSN2） 数据库驱动程序未设置

这是修改后的代码，我用它成功地连接到我的数据库。

Private Declare Function SQLConfigDataSource Lib "ODBCCP32.DLL" _
          (ByVal hwndParent As Long, ByVal fRequest As Long, _
          ByVal lpszDriver As String, ByVal lpszAttributes As String) _
          As Long
'!!!!!!!!!!
Private Const ODBC_ADD_DSN = 1 'Define request type
'!!!!!!!!!!
Public Function PrepareDSN(strServerName As String, strDBName As String, strDSN As String, strDBUser As String, strDBUserPassword As String) As Boolean
On Error GoTo error_hdl
Dim boolError As Boolean
Dim strDSNString As String
PrepareDSN = False
strDSNString = Space(MAX_BUFFER_SIZE)
strDSNString = ""
strDSNString = strDSNString & "DSN=" & strDSN & Chr(0)
strDSNString = strDSNString & "DESCRIPTION=" & "DSN Created Dynamically On " & CStr(Now) & Chr(0)
strDSNString = strDSNString & "Server=" & strServerName & Chr(0)
strDSNString = strDSNString & "DATABASE=" & strDBName & Chr(0)
strDSNString = strDSNString & Chr(0)

'!!!!!!!!!!
Const Driver As String = "SQl Server" 'Set driver descr
'!!!!!!!!!!
 If Not CBool(SQLConfigDataSource(0, _
                         ODBC_ADD_DSN, _
                        Driver, _
                        strDSNString)) Then
    boolError = True
    MsgBox ("Error in PrepareDSN::SQLConfigDataSource")

  End If
If boolError Then
    Exit Function
End If
PrepareDSN = True
Exit Function
error_hdl:
    MsgBox "PrepareDSN_ErrHandler::" & Err.Description
End Function