vba 以独占模式打开Access数据库
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Opening Access database in exclusive mode
提问by Tmdean
I'd like to be able to write a script that opens a Access database in exclusive mode so I can refresh the information in it without worrying about other users accessing the database in an inconsistent state. Is there a way to do this using VBA, or through a COM interface using VBScript?
我希望能够编写一个脚本,以独占模式打开 Access 数据库,这样我就可以刷新其中的信息,而不必担心其他用户以不一致的状态访问数据库。有没有办法使用 VBA 或通过使用 VBScript 的 COM 接口来做到这一点?
采纳答案by Ekkehard.Horner
According to this table of OLEDB init properties, you should add a "Mode=Share Exclusive" to your connection string.
根据这个 OLEDB init 属性表,您应该在连接字符串中添加“Mode=Share Exclusive”。
回答by HansUp
I didn't know what should happen if any users have the database open when your script starts. So I chose to check for the presence of a database lock file, and only continue if the lock file doesn't exist.
我不知道如果任何用户在您的脚本启动时打开数据库会发生什么。所以我选择检查数据库锁文件是否存在,只有在锁文件不存在时才继续。
Here is DoSomethingExclusively.vbs:
这是 DoSomethingExclusively.vbs:
Option Explicit
Dim strFolder
Dim strMdb
Dim strLckFile
Dim objFSO
Dim appAccess
strFolder = "C:\Access\webforums\"
strMdb = "whiteboard2003.mdb"
strLckFile = "whiteboard2003.ldb"
Set objFSO = CreateObject("Scripting.FileSystemObject")
If Not (objFSO.FileExists(strFolder & strLckFile)) Then
Set appAccess = CreateObject("Access.Application")
appAccess.OpenCurrentDatabase strFolder & strMdb, True
'* do something here; this just adds a row with current time *'
appAccess.CurrentDb.Execute _
"INSERT INTO foo (bar) VALUES ('" & CStr(Now()) & "');"
appAccess.Quit
Set appAccess = Nothing
End If
Set objFSO = Nothing