如何用VB.Net创建一个三层的数据库应用程序

indows.Forms.Button
  
   Friend WithEvents Client_DataSet As Data_Access_表示层.localhost.super_ds
  
   Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
  
   ''Required by the Windows Form Designer
  
   Private components As System.ComponentModel.Container
  
   ''NOTE: The following procedure is required by the Windows Form Designer
  
   ''It can be modified using the Windows Form Designer.
  
   ''Do not modify it using the code editor.
  
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
  
   Me.Button1 = New System.Windows.Forms.Button()
  
   Me.Button2 = New System.Windows.Forms.Button()
  
   Me.Button3 = New System.Windows.Forms.Button()
  
   Me.Client_DataSet = New Data_Access_表示层.localhost.super_ds()
  
   Me.DataGrid1 = New System.Windows.Forms.DataGrid()
  
   CType(Me.Client_DataSet, System.ComponentModel.ISupportInitialize).BeginInit()
  
   CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
  
   Me.SuspendLayout()
  
   ''
  
   ''Button1
  
   ''
  
   Me.Button1.Location = New System.Drawing.Point(88, 360)
  
   Me.Button1.Name = "Button1"
  
   Me.Button1.TabIndex = 0
  
   Me.Button1.Text = "load"
  
   ''
  
   ''Button2
  
   ''
  
   Me.Button2.Location = New System.Drawing.Point(232, 360)
  
   Me.Button2.Name = "Button2"
  
   Me.Button2.TabIndex = 1
  
   Me.Button2.Text = "update"
  
   ''
  
   ''Button3
  
   ''
  
   Me.Button3.Location = New System.Drawing.Point(376, 360)
  
   Me.Button3.Name = "Button3"
  
   Me.Button3.TabIndex = 2
  
   Me.Button3.Text = "clear"
  
   ''
  
   ''Client_DataSet
  
   ''
  
   Me.Client_DataSet.DataSetName = "Client_DataSet"
  
   Me.Client_DataSet.Locale = New System.Globalization.CultureInfo("zh-CN")
  
   Me.Client_DataSet.Namespace = "http://www.tempuri.org/CustomerDs.xsd"
  
   ''
  
   ''DataGrid1