VB.NET和访问数据库

Question

我试图同时将数据插入所有这三个表中。我有一个数据库类，我称之为。我的代码如下：

'Add Parameters
DBAccess.AddParam("@clientID", txtID.Text)
DBAccess.AddParam("@firstName", txtName.Text)
DBAccess.AddParam("@lastName", txtLastName.Text)
DBAccess.AddParam("@cell", txtCell.Text)
DBAccess.AddParam("@homeTel", txtHomeTel.Text)
DBAccess.AddParam("@workTel", txtWorkTel.Text)
DBAccess.AddParam("@email", txtEmail.Text)
DBAccess.AddParam("@homeAddress", txtHomeAddress.Text)
DBAccess.AddParam("@postalAddress", txtPostalAddress.Text)
DBAccess.AddParam("@code", txtCode.Text)

'Execute Insert Command
DBAccess.ExecQuery("INSERT INTO CLIENT ([Client_ID], [First_Name], [Last_Name]) " 
                   & VALUES (@clientID, @firstName, @lastName); ")

DBAccess.ExecQuery("INSERT INTO CONTACTS (Client_ID.C_TEL_H, Client_ID.C_TEL_W, Client_ID.C_Cell, Client_ID.C_Email) " &
          "VALUES (@homeTel, @workTel, @cell, @email, SELECT @clientID FROM CLIENT); ")
'DBAccess.ExecQuery("INSERT INTO ADDRESS ([Client_ID], [Residential_A], [Postal_A], [P_Code]) " &
' "VALUES (@clientID, @homeAddress, @postalAddress, @code); 

数据库类

Imports System.Data.OleDb
Public Class DatabaseControl
  'Database connection
  Private DBConnection As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;" &
                                                "Data Source=C:\Users\lance\Documents\BophelongCare.accdb;")
  'Prepare DB Command
  Private DBCommand As OleDbCommand
  'DB Data
  Public DBDAdapter As OleDbDataAdapter
  Public DBDTable As DataTable

  'Query Parameters
  Public Params As New List(Of OleDbParameter)

  'Query Statistics
  Public RecordCount As Integer
  Public Exception As String

  Public Sub ExecQuery(Query As String)
    'Rest query Statistics
    RecordCount = 0
    Exception = ""

    Try
      'Open Connection
      DBConnection.Open()

      'Create DB Command
      DBCommand = New OleDbCommand(Query, DBConnection)

      'Load Parameters Into DB Command
      Params.ForEach(Sub(p) DBCommand.Parameters.Add(p))

      'Clear Parameter List
      Params.Clear()

      'Execute Command & Fill DataTable
      DBDTable = New DataTable
      DBDAdapter = New OleDbDataAdapter(DBCommand)
      RecordCount = DBDAdapter.Fill(DBDTable)
    Catch ex As Exception
        Exception = ex.Message
    End Try

    'Close Connection
    If DBConnection.State = ConnectionState.Open Then DBConnection.Close()
  End Sub

  ' Include query & Command Parameters
  Public Sub AddParam(Name As String, Value As Object)
    Dim NewParam As New OleDbParameter(Name, Value)
    Params.Add(NewParam)
  End Sub
End Class

请协助