Microsoft.ACE.OLEDB.12.0 provider is not registere

问题:

I have a Visual Studio 2008 solution with two projects (a Word-Template project and a VB.Net console application for testing). Both projects reference a database project which opens a connection to an MS-Access 2007 database file and have references to System.Data.OleDb. In the database project I have a function which retrieves a data table as follows

 private class AdminDatabase
   \' stores the connection string which is set in the New() method
   dim strAdminConnection as string

   public sub New()
   ...
   adminName = dlgopen.FileName
   conAdminDB = New OleDbConnection
   conAdminDB.ConnectionString = \"Data Source=\'\" + adminName + \"\';\" + _
       \"Provider=Microsoft.ACE.OLEDB.12.0\"

   \' store the connection string in strAdminConnection
   strAdminConnection = conAdminDB.ConnectionString.ToString()
   My.Settings.SetUserOverride(\"AdminConnectionString\", strAdminConnection)
   ...
   End Sub

   \' retrieves data from the database
   Public Function getDataTable(ByVal sqlStatement As String) As DataTable
        Dim ds As New DataSet
        Dim dt As New DataTable
        Dim da As New OleDbDataAdapter
        Dim localCon As New OleDbConnection


        localCon.ConnectionString = strAdminConnection

        Using localCon
            Dim command As OleDbCommand = localCon.CreateCommand()
            command.CommandText = sqlStatement
            localCon.Open()
            da.SelectCommand = command
            da.Fill(dt)
            getDataTable = dt
        End Using

    End Function
End Class

When I call this function from my Word 2007 Template project everything works fine; no errors. But when I run it from the console application it throws the following exception

ex = {\"The \'Microsoft.ACE.OLEDB.12.0\' provider is not registered on the local machine.\"}

Both projects have the same reference and the console application did work when I first wrote it (a while ago) but now it has stopped work. I must be missing something but I don\'t know what. Any ideas?

回答1:

I have a visual Basic program with Visual Studio 2008 that uses an Access 2007 database and was receiving the same error. I found some threads that advised changing the advanced compile configuration to x86 found in the programs properties if you\'re running a 64 bit system. So far I haven\'t had any problems with my program since.

回答2:

Basically, if you\'re on a 64-bit machine, IIS 7 is not (by default) serving 32-bit apps, which the database engine operates on. So here is exactly what you do:

1) ensure that the 2007 database engine is installed, this can be downloaded at: http://www.microsoft.com/downloads/details.aspx?FamilyID=7554F536-8C28-4598-9B72-EF94E038C891&displaylang=en

2) open IIS7 manager, and open the Application Pools area. On the right sidebar, you will see an option that says \"Set application pool defaults\". Click it, and a window will pop up with the options.

3) the second field down, which says \'Enable 32-bit applications\' is probably set to FALSE by default. Simply click where it says \'false\' to change it to \'true\'.

4) Restart your app pool (you can do this by hitting RECYCLE instead of STOP then START, which will also work).

5) done, and your error message will go away.

回答3:

Are you running a 64 bit system with the database running 32 bit but the console running 64 bit? There are no MS Access drivers that run 64 bit and would report an error identical to the one your reported.

回答4:

---

Solution:

That\'s it! Thanks Arjun Paudel for the link. Here\'s the solution as found on XNA Creator\'s Club Online. It\'s by Stephen Styrchak.

The following error suggests me to believe that you are compiling for 64bit:

The \'Microsoft .ACE.OELDB.12.0\' provider is not registered on the local machine

I dont have express edition but are following steps valid in 2008 express?

http://forums.xna.com/forums/t/4377.aspx#22601

http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/thread/ed374d4f-5677-41cb-bfe0-198e68810805/?prof=required
- Arjun Paudel

---

In VC# Express, this property is missing, but you can still create an x86 configuration if you know where to look.

It looks like a long list of steps, but once you know where these things are it\'s a lot easier. Anyone who only has VC# Express will probably find this useful. Once you know about Configuration Manager, it\'ll be much more intuitive the next time.

1.In VC# Express 2005, go to Tools -> Options.
2.In the bottom-left corner of the Options dialog, check the box that says, \"Show all settings\".
3.In the tree-view on the left hand side, select \"Projects and Solutions\".
4.In the options on the right, check the box that says, \"Show advanced build configuraions.\"
5.Click OK.
6.Go to Build -> Configuration Manager...
7.In the Platform column next to your project, click the combobox and select \"<New...>\".
8.In the \"New platform\" setting, choose \"x86\".
9.Click OK.
10.Click Close.
There, now you have an x86 configuration! Easy as pie! :-)

I also recommend using Configuration Manager to delete the Any CPU platform. You really don\'t want that if you ever have depedencies on 32-bit native DLLs (even indirect dependencies).

Stephen Styrchak | XNA Game Studio Developer http://forums.xna.com/forums/p/4377/22601.aspx#22601

---

回答5:

I thought I\'d chime in because I found this question when facing a slightly different context of the problem and thought it might help other tormented souls in the future:

I had an ASP.NET app hosted on IIS 7.0 running on Windows Server 2008 64-bit.

Since IIS is in control of the process bitness, the solution in my case was to set the Enable32bitAppOnWin64 setting to true: http://blogs.msdn.com/vijaysk/archive/2009/03/06/iis-7-tip-2-you-can-now-run-32-bit-and-64-bit-applications-on-the-same-server.aspx

It works slightly differently in IIS 6.0 (You cannot set Enable32bitAppOnWin64 at application-pool level) http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/0aafb9a0-1b1c-4a39-ac9a-994adc902485.mspx?mfr=true

回答6:

I\'m having same problem. I try to install office 2010 64bit on windows 7 64 bit and then install 2007 Office System Driver : Data Connectivity Components.

after that, visual studio 2008 can opens a connection to an MS-Access 2007 database file.

回答7:

See my post on a similar Stack Exchange thread https://stackoverflow.com/a/21455677/1368849

I had version 15, not 12 installed, which I found out by running this PowerShell code...

(New-Object system.data.oledb.oledbenumerator).GetElements() | select SOURCES_NAME, SOURCES_DESCRIPTION

...which gave me this result (I\'ve removed other data sources for brevity)...

SOURCES_NAME              SOURCES_DESCRIPTION                                                                       
------------              -------------------                                                                       
Microsoft.ACE.OLEDB.15.0  Microsoft Office 15.0 Access Database Engine OLE DB Provider

回答8:

I\'ve got the same error on a fully updated Windows Vista Family 64bit with a .NET application that I\'ve compiled to 32 bit only - the program is installed in the programx86 folder on 64 bit machines. It fails with this error message even with 2007 access database provider installed, with/wiothout the SP2 of the same installed, IIS installed and app pool set for 32bit app support... yes I\'ve tried every solution everywhere and still no success.

I switched my app to ACE OLE DB.12.0 because JET4.0 was failing on 64bit machines - and it\'s no better :-/ The most promising thread I\'ve found was this:

http://ellisweb.net/2010/01/connecting-to-excel-and-access-files-using-net-on-a-64-bit-server/

but when you try to install the 64 bit \"2010 Office System Driver Beta: Data Connectivity Components\" it tells you that you can\'t install the 64 bit version without uninstalling all 32bit office applications... and installing the 32 bit version of 2010 Office System Driver Beta: Data Connectivity Components doesn\'t solve the initial problem, even with \"Microsoft.ACE.OLEDB.12.0\" as provider instead of \"Microsoft.ACE.OLEDB.14.0\" which that page (and others) recommend.

My next attempt will be to follow this post:

The issue is due to the wrong flavor of OLEDB32.DLL and OLEDB32r.DLL being registered on the server. If the 64 bit versions are registered, they need to be unregistered, and then the 32 bit versions registered instead. To fix this, unregister the versions located in %Program Files%/Common Files/System/OLE DB. Then register the versions at the same path but in the %Program Files (x86)% directory.

Has anyone else had so much trouble with both JET4.0 and OLEDB ACE providers on 64 bit machines? Has anyone found a solution if none of the others work?

回答9:

I am assuming that if you are running a 64 bit system with a 32 bit database and trying to run a 64 bit console, the following packages need to be installed on the machine.

1. Install the Microsoft Access Database Engine 2010 x86 Redistributable, this installation is available at: http://www.microsoft.com/download/en/details.aspx?id=13255 .
2. Data Connectivity Components of Office 2007, this installation is available at: http://www.microsoft.com/download/en/confirmation.aspx?id=23734 .
3. Microsoft Access Database Engine 2010 x64 Redistributable. You will need to download the package locally and run it with a passive flag. You can download the installation here: http://www.microsoft.com/en-us/download/details.aspx?id=13255 Installing using the command prompt with the \'/passive\' flag. In the command prompt run the following command: \'AccessDatabaseEngine_x64.exe /passive\'

Note: The order seems to matter - so if you have anything installed already, uninstall and follow the steps above.