用access做應用程序，往往做成"數(shù)據(jù)"和"程序"兩個數(shù)據(jù)庫，"數(shù)據(jù)"數(shù)據(jù)庫中只存放數(shù)據(jù)表，"程序"數(shù)據(jù)庫中存放所有的form，query,report,module等，通過表聯(lián)接"程序"數(shù)據(jù)庫可以訪問所有"數(shù)據(jù)"數(shù)據(jù)庫中的表。

當我們的應用程序更換存儲位置的時候往往失去正確的表聯(lián)接，造成運行錯誤。下面的一段程序可以自動找回表聯(lián)接。在我的應用中"程序"數(shù)據(jù)庫名字是stockMgr.mdb,"數(shù)據(jù)"數(shù)據(jù)庫名字是stock-Data.mdb

注意： 該程序僅限于"程序"和"數(shù)據(jù)"存放在同一個目錄而且是對應單個"數(shù)據(jù)"文件的情況。

Function ReAttachTable()

Dim MyDB As Database, MyTbl As TableDef

Dim cpath As String

Dim datafiles As String, i As Integer

On Error Resume Next

Set MyDB = CurrentDb

cpath = trimFileName(CurrentDb.Name)

datafiles = "stock-data.mdb"

DoCmd.Hourglass True

For i = 0 To MyDB.TableDefs.Count - 1

Set MyTbl = MyDB.TableDefs(i)

If MyTbl.Attributes = DB_ATTACHEDTABLE And Left(MyTbl.Connect, 1) = ";" Then

MyTbl.Connect = ";DATABASE=" & cpath & datafiles

MyTbl.RefreshLink

If Err Then

If vbNo = MsgBox(Err.description & "，繼續(xù)嗎?", vbYesNo) Then Exit For

End If

End If

Next i

DoCmd.Hourglass False

msgbox "Tables relink finish."

End Function

'絕對路徑中去掉文件名，返回路徑

Function trimFileName(fullname As String) As String

Dim slen As Long, i As Long

slen = Len(fullname)

For i = slen To 1 Step -1

If Mid(fullname, i, 1) = "" Then

Exit For

End If

Next

trimFileName = Left(fullname, i)

End Function

在程序啟動或者按鈕動作中調(diào)用即可。

更多信息請查看IT技術專欄