我正在尝试使用 Visual Studio 2008 中的 Jet 连接到 Access 数据库，如下所示 -
dbProvider = "提供者 = Microsoft.Jet.OLEDB.4.0;"
然后找到要读取的源文件并打开和关闭它-
con.Open() con.Close()
但是，我在运行时收到一条错误消息 -
' 'Microsoft.Jet.OLEDB.4.0' 提供程序未在本地计算机上注册'
我正在运行 Windows 7，msjet40.dll 位于窗口的 SysWOW64 文件夹中。
任何建议将不胜感激，干杯。
这可能意味着您正在尝试将 32 位应用程序连接到 64 位驱动程序或相反。因此，您需要更改 exe 的位数，或安装相应的访问驱动程序：Microsoft Access Database Engine 2010 Redistributable
Jet 本身不能在 X64 上工作。但是 SQL Server 可以！~
如何获得 Jet 的 x64 版本？ http://blogs.msdn.com/b/psssql/archive/2010/01/21/how-to-get-a-x64-version-of-jet.aspx
我们有很多人询问他们如何将 Jet ODBC 驱动程序/OLE DB 提供程序作为 64 位。Windows 仅提供这些的 32 位版本。答案是 Windows 版本不会是 x64，因为这些项目已被弃用。已弃用是什么意思？以下是 MSDN 上 MDAC/WDAC 路线图的摘录：
Deprecated MDAC/WDAC Components
These components are still supported in the current release of MDAC/WDAC, but they might be removed in future releases. Microsoft recommends, when you develop new applications, that you avoid using these components. Additionally, when you upgrade or modify existing applications, remove any dependency on these components.
以下是它列出的有关 Jet 数据库引擎的内容：
Microsoft Jet Database Engine 4.0: Starting with version 2.6, MDAC no longer contains Jet components. In other words, MDAC 2.6, 2.7, 2.8, and all future MDAC/WDAC releases do not contain Microsoft Jet, the Microsoft Jet OLE DB Provider, the ODBC Desktop Database Drivers, or Jet Data Access Objects (DAO). The Microsoft Jet Database Engine 4.0 components entered a state of functional deprecation and sustained engineering, and have not received feature level enhancements since becoming a part of Microsoft Windows in Windows 2000.
There is no 64-bit version of the Jet Database Engine, the Jet OLEDB Driver, the Jet ODBC Drivers, or Jet DAO available. This is also documented in KB article 957570. On 64-bit versions of Windows, 32-bit Jet runs under the Windows WOW64 subsystem. For more information on WOW64, see http://msdn.microsoft.com/en-us/library/aa384249(VS.85).aspx. Native 64-bit applications cannot communicate with the 32-bit Jet drivers running in WOW64.
Instead of Microsoft Jet, Microsoft recommends using Microsoft SQL Server Express Edition or Microsoft SQL Server Compact Edition when developing new, non-Microsoft Access applications requiring a relational data store. These new or converted Jet applications can continue to use Jet with the intention of using Microsoft Office 2003 and earlier files (.mdb and .xls) for non-primary data storage. However, for these applications, you should plan to migrate from Jet to the 2007 Office System Driver. You can download the 2007 Office System Driver, which allows you to read from and write to pre-existing files in either Office 2003 (.mdb and .xls) or the Office 2007 (*.accdb, *.xlsm, *.xlsx and *.xlsb) file formats. IMPORTANT Please read the 2007 Office System End User License Agreement for specific usage limitations.