title: Unrecognised database format
body: <p>I would like to load some data from an access-database in my C#-application. But when it tries to make a connection with the database, I get this error:</p>
  
  <blockquote>
    <p>Unrecognised database format</p>
  </blockquote>
  
  <p>How do I solve this?</p>
  
  <p>This is my code:</p>
  
  <pre><code>private void btnBrowseDB_Click(object sender, EventArgs e)
  {
      OpenFileDialog ofd = new OpenFileDialog();
      ofd.Title = "Kies een databank.";
      ofd.Filter = "Microsoft Access Databank (*.accdb)|*.accdb";
      ofd.RestoreDirectory = true;
  
      if (ofd.ShowDialog() == DialogResult.OK)
      {
          txtDBLocation.Text = ofd.FileName;
          loadCampagnes(ofd.FileName);
      }
  }
  
  private void loadCampagnes(string pathDB)
  {
      string connString = "Provider=Microsoft.Jet.OLEDB.4.0;"
                          + "User ID=;"
                          + "Password=;"
                          + "Data Source =" + pathDB + ";";
      try
      {
          OleDbConnection oleDbConn = new OleDbConnection(connString);
  
          string strSQL = "SELECT id, naam "
                          + "FROM Marketingcampagne ";
  
          OleDbCommand oleDbCmd = new OleDbCommand(strSQL, oleDbConn);
          oleDbConn.Open();
          OleDbDataReader oleDbReader = oleDbCmd.ExecuteReader();
  
          while (oleDbReader.Read())
          {
              string strCampagneNaam = "";
              int intValue;
  
              int intField = oleDbReader.GetOrdinal("naam");
              if (!oleDbReader.IsDBNull(intField))
                  strCampagneNaam = oleDbReader.GetString(intField);
  
              intField = oleDbReader.GetOrdinal("id");
              if (!oleDbReader.IsDBNull(intField))
                  intValue = oleDbReader.GetInt32(intField);
  
              lbCampagnes.Items.Add(strCampagneNaam);
          }
  
          oleDbConn.Close();
      }
  
      catch (OleDbException ex)
      {
          MessageBox.Show("Problemen bij het ophalen van de data (" + ex.Message + ")");
      }
  
      catch (Exception ex)
      {
          MessageBox.Show("Onbekende fout (" + ex.Message + ")");
      }
  }
  </code></pre>
  
  <p>Vincent</p>
  
  <p>ps. I use Windows 7 64-bit, but I have changed the target CPU to x86.</p>