我有一个小型的Access应用程序，只有3或4人会使用，但我希望他们能够使用它从不同的位置。一次只有一个人会使用它。他们是一个非盈利的，资金很少或没有。他们没有服务器，目前在所有人之间来回共享Excel电子表格。我能想到的最简单的事情就是将.accdb文件上传到Dropbox帐户，并让他们从那里访问它。我知道你可以将它发布到SharePoint，但它们都是Office的本地副本。有没有问题做Dropbox的事情，或者有没有更好的选择你们任何人都可以建议？我可以通过Dropbox共享一个MS-Access数据库应用程序吗？
我同意在使用Dropbox的文件夹的共享位置可以可能工作前提是只有一个人有数据库在任何一个时间开放。如果多人同时打开数据库，那么当Dropbox去同步文件时，它可能会打断别人的更改，或者发生同步冲突，或者只是让人感到非常困惑。
如果我是用这个方法，我肯定不会依靠告诉用户“如果有其他人打开它之前使用数据库经常检查”，以尝试或“总是以独占模式打开数据库”。相反，我会使用像下面的VBScript这样的小启动脚本来管理对数据库的访问。它使用第二个文件扩展名（.Available或.IN_USE）来指示数据库文件的状态，生成本地（未同步）副本，在Access中打开该副本，然后将更新后的文件复制回Dropbox文件夹，以便它可以同步。
Option Explicit
Dim WshShell, fso, f, AccessPath, DropboxFolder, WorkingFolder, DatabaseName
Const TemporaryFolder = 2
DropboxFolder = "C:\Users\Gord\Dropbox\dbStorage\"
DatabaseName = "myDatabase.accdb"
Set fso = CreateObject("Scripting.FileSystemObject")
WorkingFolder = fso.GetSpecialFolder(TemporaryFolder) & "\"
If fso.FileExists(DropboxFolder & DatabaseName & ".Available") Then
Set f = fso.GetFile(DropboxFolder & DatabaseName & ".Available")
f.Name = DatabaseName & ".IN_USE"
WScript.Echo "Copying database file to working folder..."
f.Copy WorkingFolder & DatabaseName
Set f = Nothing
Set WshShell = CreateObject("WScript.Shell")
AccessPath = WshShell.RegRead("HKEY_CLASSES_ROOT\Access.MDBFile\shell\Open\command\")
AccessPath = Left(AccessPath, InStr(AccessPath, "MSACCESS.EXE") + 12)
WScript.Echo "Launching Access..."
WshShell.Run AccessPath & " """ & WorkingFolder & DatabaseName & """", 1, True
WScript.Echo "Copying database file back to Dropbox folder..."
fso.CopyFile WorkingFolder & DatabaseName, DropboxFolder & DatabaseName & ".IN_USE"
Set f = fso.GetFile(DropboxFolder & DatabaseName & ".IN_USE")
f.Name = DatabaseName & ".Available"
Set f = Nothing
Else
If fso.FileExists(DropboxFolder & DatabaseName & ".IN_USE") Then
MsgBox "The database is currently in use. Try again later."
Else
MsgBox "The database could not be found."
End If
End If
Set fso = Nothing
启动器可以通过一个快捷方式，其目标是
CSCRIPT.EXE C:\wherever\launchMyDatabase.vbs
这是戈德汤普森脚本的增强版本，它试图告知用户，帮助他们做“正确的事”来调用。
它还与异常行为交易，如不良上网（它鼓励用户不使用它！），也与剧本由曾经访问已经打开的用户）
' This uses a second file extension (.Available or .InUse) to indicate the status of the database file,
' makes a local (not synced) copy inthe temp folder and opens that copy in Access.
' The updated file is copied back to the Dropbox folder so it can be synced.
' A backup fodler and file can be created with a date in the filename if the suer chooses to.
'
' The launcher could be invoked by a shortcut whose target is
'
' CSCRIPT.EXE C:\!AA\OpenFMFtoolDatabase.vbs
' Or to debug (it can open in VS if VS has been setup right with an external tool)
' CSCRIPT.EXE /X C:\!AA\OpenFMFtoolDatabase.vbs
' ----------------------------------------------------------------------------------------
' ----------------------------------------------------------------------------------------
' ----------------------------------------------------------------------------------------
' This file is used to open and backup the FMFtool university and Subject database
'
' It can be invoked by a shortcut whose target is CSCRIPT.EXE C:\!AA\OpenFMFtoolDatabase.vbs
'
' See the tag #DOTHESE below for constants that need to be changed for each specific user
'Option Explicit
' ----------------------------------------------------------------------------------------
' ----------------------------------------------------------------------------------------
' ----------------------------------------------------------------------------------------
' Supporting functions
'
Function LPad(MyString, MakeStringThisLong, PadWithThisChar)
Dim n: n = 0
If MakeStringThisLong > Len(MyString) Then n = MakeStringThisLong - Len(MyString)
LPad = String(n, PadWithThisChar) & MyString
End Function
Function BuildDateForFile()
Dim TheMonth, TheDay
TheMonth = LPad(Month(Date), 2, "0")
TheDay = LPad(Day(Date), 2, "0")
BuildDateForFile = DatePart("yyyy", Now) & TheMonth & TheDay & "_"
End Function
' ----------------------------------------------------------------------------------------
' ----------------------------------------------------------------------------------------
' ----------------------------------------------------------------------------------------
' Main Procedure
'
Sub OpenDatabase()
' -----------------------------------------------------------------
' -----------------------------------------------------------------
' USER/MACHINE SPECIFIC#DOTHESE
Const SupportEmail = "[email protected]"
' This script may prompt the user to contact support using this email address.
Const DropboxFolder = "C:\!AA\DropBox\"
' A typical value is "C:\Users\Gord\Dropbox\dbStorage\" Note that it must END WITH a backslash
' It is set to the name of the LOCAL folder (ie a folder on the PC running this script) which is synced with dropbox
' (or any internet based file sharing system like Dropbox, Onedrive, GDrive, etc)
Const DatabaseCalled = "University and Subject Database"
' The name of the database file without the file extension (ie no .accdb)
Const DatabaseExtension = ".accdb"
' The file extension (eg .accdb)
' -----------------------------------------------------------------
' -----------------------------------------------------------------
' General constants
Const TemporaryFolder = 2
Const TAGForINUSE = ".InUse"
Const TAGForAVAILABLE = ".Available"
Const TAGForOldLocalFile = ".OldFile"
Dim WshShell, f, AccessPath, WorkingFolder, DatabaseName
Dim FileNameWhenInUse, FileNameWhenAvailable
Dim DropBoxInUse, DropBoxAvailable
Dim DropboxBackupFolder, DropboxBackupFileName, DropboxDONOTBackupFileName
Dim LocalFile, OldLocalFile
Dim blnOpenLocalFile
' -----------------------------------------------------------------
' Use these lines when delivering the code
Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
' -----------------------------------------------------------------
' Use may use these lines when writing the code
'Dim fso As Scripting.FileSystemObject
'Set fso = New Scripting.FileSystemObject
' -----------------------------------------------------------------
' About files and folders
DatabaseName = DatabaseCalled & DatabaseExtension
FileNameWhenInUse = DatabaseName & TAGForINUSE
FileNameWhenAvailable = DatabaseName & TAGForAVAILABLE
DropBoxInUse = DropboxFolder & FileNameWhenInUse
DropBoxAvailable = DropboxFolder & FileNameWhenAvailable
DropboxBackupFolder = DropboxFolder & "Backups"
WorkingFolder = fso.GetSpecialFolder(TemporaryFolder) & "\"
' eg often: C:\Users\Harvey\AppData\Local\Temp\
LocalFile = WorkingFolder & DatabaseName
OldLocalFile = LocalFile & TAGForOldLocalFile
blnOpenLocalFile = False
' -----------------------------------------------------------------
' WARN User
'
If vbNo = MsgBox("This will open " & DatabaseName & vbCrLf & _
vbCrLf & _
"DO YOU HAVE ACCESS TO THE WEB?" & vbCrLf & _
vbCrLf & _
"Do not click YES unless you are sure you do as the web is needed to prevent other people from opening the above file while you have it open. " & vbCrLf & _
vbCrLf & _
"NOTE 1: It is OK to loose web access once the file is opened - but others will not be able to use it again until you have web access (and have closed the file)." & vbCrLf & _
vbCrLf & _
"NOTE 2: If you click YES and you do not have web accesss, either you or someone else WILL LOOSE ALL changes made to the file!)", vbYesNo) Then
Exit Sub
End If
' ---------------------------------------------------------------------------------
' ---------------------------------------------------------------------------------
'
' Main processing -
' The file is only opened if it is available (ie not in use by another person).
' It can also be opened if it is determined that the file was not copied back to the dropbox folder
' but was "accidentally" left in the temp folder
' When it is opened the file is renamed on dropbox to indicate it is unavailable
'
If fso.FileExists(DropBoxAvailable) Then
Set f = fso.GetFile(DropBoxAvailable)
' This renames the file on dropbox to be "InUse"
f.Name = FileNameWhenInUse
'
' Allow dropbox to upload the file ASAP (if possible, force dropbox to sync here)
'
WScript.Echo "Copying database file to temp folder..."
f.Copy LocalFile
Set f = Nothing
blnOpenLocalFile = True
Else
If fso.FileExists(DropBoxInUse) Then
If fso.FileExists(LocalFile) Then
MsgBox "The database was found locally and will be opened " & vbCrLf & _
vbCrLf & _
"(it had already been previoulsy opened by you, but not written back to the dropbox folder (perhaps a process crashed)."
blnOpenLocalFile = True
Else
MsgBox "The database is currently in use by someone else. Try again later."
blnOpenLocalFile = False
End If
Else
MsgBox "The database could not be found on dropbox " & vbCrLf & _
vbCrLf & _
"(Both " & TAGForINUSE & " and " & TAGForAVAILABLE & " versions are missing from dropbox!)."
If fso.FileExists(LocalFile) Then
MsgBox "A Copy of the file exists locally on your computer. " & vbCrLf & _
vbCrLf & _
"(The file will be opened and written back to dropbox as usual BUT - " & vbCrLf & _
"please email " & SupportEmail & " as this situation should not be arising!)."
blnOpenLocalFile = True
Else
If fso.FileExists(OldLocalFile) Then
MsgBox "A backup copy of the local file exists (know as the OldLocalFile)" & vbCrLf & _
vbCrLf & "Email support on " & SupportEmail & vbCrLf & _
"to find out what to do (as this is a really wierd situation)."
Else
MsgBox "A backup copy of the local file DOES NOT EXIST " & vbCrLf & _
vbCrLf & "Email support on " & SupportEmail & vbCrLf & _
"..but being honest you may be in a really bad pickle, but if you've been taking backups you'll be fine!"
End If
blnOpenLocalFile = False
End If
End If
End If
If blnOpenLocalFile Then
' ---------------------------------------------------------------------------------
' Take a daily backup
'
If Not fso.FolderExists(DropboxBackupFolder) Then
WScript.Echo "Creating backup folder."
fso.CreateFolder DropboxBackupFolder
End If
DropboxBackupFileName = DropboxBackupFolder & "\" & BuildDateForFile() & DatabaseName
DropboxDONOTBackupFileName = DropboxBackupFileName & ".NoBackup"
DropboxBackupFileName = DropboxBackupFileName & ".Backup"
If Not (fso.FileExists(DropboxBackupFileName)) And Not (fso.FileExists(DropboxDONOTBackupFileName)) Then
If vbYes = MsgBox("Do you want to take a daily backup? " & vbCrLf & _
vbCrLf & "(click YES if a lot of work has been done since the last backup was taken. " & vbCrLf & _
" If in doubt click YES)", vbYesNo) Then
WScript.Echo "Creating daily backup file."
fso.CopyFile LocalFile, DropboxBackupFileName
Else
' Create an empty text file to flag no backup is wanted that day
WScript.Echo "No daily backup file will be created."
fso.CreateTextFile (DropboxDONOTBackupFileName)
End If
End If
' ---------------------------------------------------------------------------------
' Open the file
'
Set WshShell = CreateObject("WScript.Shell")
AccessPath = WshShell.RegRead("HKEY_CLASSES_ROOT\Access.MDBFile\shell\Open\command\")
AccessPath = Left(AccessPath, InStr(AccessPath, "MSACCESS.EXE") + 12)
WScript.Echo "Launching Access and Opening temp database file: " & vbCrLf & LocalFile
WshShell.Run AccessPath & " """ & LocalFile & """", 1, True
WScript.Echo "Copying temp database file back to Dropbox folder..."
fso.CopyFile LocalFile, DropBoxInUse
Set f = fso.GetFile(DropBoxInUse)
f.Name = FileNameWhenAvailable
Set f = Nothing
' Make another copy of the file that was copied to the dropbox folder, then delete the original file
' (This might help stop a bad catastrophe!)
WScript.Echo "In Temp Folder: Copying temp database file to be .oldfile"
fso.CopyFile LocalFile, OldLocalFile
WScript.Echo "In Temp Folder: Deleting temp database file "
fso.DeleteFile LocalFile
End If
Set fso = Nothing
End Sub
' Do the work!
OpenDatabase
终止交易如果你保证一次只有一个人使用它，那么DropBox可能工作。但是，您可以通过Access支持获得一些在线托管服务，每月只需花费几美元，这对您而言可能会更好。寻找折扣虚拟主机，或者甚至可能有一些公司专门提供Access。 –
我认为这将取决于尝试使用DropBox像网络共享的延迟。当你要求Access做某件事时，它必须在处理之前将所有数据从远程位置转移到本地计算机。 – Rikalous