用ASP開啟遠端MDB檔案的方法

如果你用ODBC connection (DSN or DSN-less)來訪問遠端的(UNC path)資料庫, OLEDB會出現以下錯誤資訊：

Microsoft OLE DB Provider for ODBC Drivers error '80004005'

[Microsoft][ODBC Microsoft Access Driver] The Microsoft Jet database engine cannot open the file '(unknown)'. It is already opened exclusively by another user, or you need permission to view its data.

你完全可以避免這種錯誤--ASP和ActiveX支援兩種方式開啟MDB檔案的DSN-less串連，或由其它機器訪問MDB檔案。

1. DAO database (only for small load)

Dim File, Conn, RS
Const ReadOnly = False
File = "\\server\share\file.mdb"
Set Conn = CreateObject("DAO.DBEngine.35").Workspaces(0).OpenDatabase(File,,ReadOnly)
Set RS = Conn.OpenRecordset(SQL)

2. ADO + Jet OLE DB provider

Dim Conn, RS
Set Conn = CreateObject("ADODB.Connection")
Conn.Provider = "Microsoft.Jet.OLEDB.4.0"
Conn.Open "\\server\share\file.mdb"
Set RS = Conn.Execute(SQL)

你得確定使用ASP的使用者有NT的資料庫及共用存取權限。
假定有許可權的話，你亦可訪問其它機器中的開放資料連線:

'http://www.pstruh.cz
Set UM = CreateObject("UserManager.Server")
UM.LogonUser "Login with the rights", "Password", "Domain"
...
open database
...
UM.RevertToSelf