VB 壓縮Access資料庫

Private Const MAX_PATH = 260
 Public Declare Function GetTempPath Lib "kernel32" Alias "GetTempPathA" (ByVal nBufferLength As Long, ByVal lpBuffer As String) As Long

Public Sub CompactJetDatabase(Location As String, _
                              Optional BackupOriginal As Boolean = True)

    On Error GoTo CompactErr

    Dim strBackupFile As String

    Dim strTempFile   As String

    '檢查資料庫檔案是否存在

    If Len(Dir(Location)) Then

        '如果需要備份就執行備份

        If BackupOriginal = True Then

            strBackupFile = GetTemporaryPath & "backup.mdb"

            If Len(Dir(strBackupFile)) Then Kill strBackupFile

            FileCopy Location, strBackupFile

        End If

        '建立臨時檔案名

        strTempFile = GetTemporaryPath & "temp.mdb"

        If Len(Dir(strTempFile)) Then Kill strTempFile

        '通過DBEngine壓縮資料庫檔案

        DBEngine.CompactDatabase Location, strTempFile

        '删除原來的資料庫檔案

        Kill Location

        '拷貝剛剛壓縮過臨時資料庫檔案至原來位置

        FileCopy strTempFile, Location

        '删除臨時檔案

        Kill strTempFile

    Else

    End If

CompactErr:

    Exit Sub

End Sub

Public Function GetTemporaryPath()

    Dim strFolder As String

    Dim lngResult As Long

    strFolder = String(MAX_PATH, 0)

    lngResult = GetTempPath(MAX_PATH, strFolder)

    If lngResult <> 0 Then

        GetTemporaryPath = Left(strFolder, InStr(strFolder, Chr(0)) - 1)

    Else

        GetTemporaryPath = ""

    End If

End Function