access中數(shù)據(jù)表的自動(dòng)重新聯(lián)接

    用access做應(yīng)用程序，往往做成"數(shù)據(jù)"和"程序"兩個(gè)數(shù)據(jù)庫(kù)，"數(shù)據(jù)"數(shù)據(jù)庫(kù)中只存放數(shù)據(jù)表，"程序"數(shù)據(jù)庫(kù)中存放所有的form，query,report,module等，通過(guò)表聯(lián)接"程序"數(shù)據(jù)庫(kù)可以訪問(wèn)所有"數(shù)據(jù)"數(shù)據(jù)庫(kù)中的表。
    當(dāng)我們的應(yīng)用程序更換存儲(chǔ)位置的時(shí)候往往失去正確的表聯(lián)接，造成運(yùn)行錯(cuò)誤。下面的一段程序可以自動(dòng)找回表聯(lián)接。在我的應(yīng)用中"程序"數(shù)據(jù)庫(kù)名字是stockMgr.mdb,"數(shù)據(jù)"數(shù)據(jù)庫(kù)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(gè)目錄而且是對(duì)應(yīng)單個(gè)"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(duì)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(dòng)或者按鈕動(dòng)作中調(diào)用即可。