ystem.Windows.Forms.Control() {Me.DataGrid1, Me.Button3, Me.Button2, Me.Button1})
Me.Name = "Form1"
Me.Text = "Form1"
CType(Me.Client_DataSet, System.ComponentModel.ISupportInitialize).EndInit()
CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).EndInit()
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Customer_Ds As New localhost.super_ds()
Dim ser1 As New localhost.Service1()
Customer_Ds.Merge(ser1.Get_Dataset)
DataGrid1.DataSource = Customer_Ds
End Sub
End Class
总结：可见，表示层窗体上完全没有数据库连接控件，它与数据库的连接任务是通过业务层来完成的，这样，程序的结构更加清晰，当然业务层的实现也可以用其他方法，比如：写一个自己的类来完成与数据库的数据传输。
(转自51dotnet)
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