完全被卡住...引发错误：System.Data.OleDb.OleDbException：'无法识别的数据库格式

Question

我有32位版本的Office，并且使用的是“任何CPU”。

对此错误非常好奇的部分是，我的程序在此发生之前运行良好。老实说，这似乎使这个错误脱颖而出，我没有进行任何重大更改。

这是我的代码。该错误引发在Cnn.Open（）。

Imports System.Data.OleDb

Public Class MainWindow
    Dim provider As String
    Dim dataFile As String
    Dim connString As String
    Dim myConnection As OleDbConnection = New OleDbConnection
    Dim addedBonuses As New DataTable

Public Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    provider = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source ="
    'Change the following to your access database location
    dataFile = "C:\Users\mousaghannnam\source\repos\CampbellBonuses\CampbellBonuses\CampbellBonuses.accdb;"
    connString = provider & dataFile

    'For Employee Information
    Dim cnn As New OleDb.OleDbConnection
    Dim cmd As New OleDb.OleDbCommand
    Dim da As New OleDb.OleDbDataAdapter
    cnn.ConnectionString = connString

    'For Incentives Information
    Dim cnn2 As New OleDb.OleDbConnection
    Dim cmd2 As New OleDb.OleDbCommand
    Dim da2 As New OleDb.OleDbDataAdapter
    cnn2.ConnectionString = connString
    cnn.Open()

以下是错误的详细信息。

HResult=0x80004005
  Message=Unrecognized database format 'C:\Users\mousaghannnam\source\repos\CampbellBonuses\CampbellBonuses\CampbellBonuses.accdb'.
  Source=System.Data
  StackTrace:
   at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection)
   at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
   at System.Data.ProviderBase.DbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   at System.Data.OleDb.OleDbConnection.Open()
   at CampbellBonuses.MainWindow.Form1_Load(Object sender, EventArgs e) in C:\Users\mousaghannnam\source\repos\CampbellBonuses\CampbellBonuses\Form1.vb:line 28
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

如果有人知道为什么会这样，我将不胜感激。