Designing and implementing a versatile data access tier for an ASP.NET application

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using BLT;
using TDS;

namespace DAPrototype
{
	/// <summary>
	/// Used for the statistic purpose(DataSet) 
	/// </summary>
public class DSTest : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid dgTest;
		protected System.Web.UI.WebControls.Label lbTotal;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			BLOrder blOrder = new BLOrder();
            DSOrderDetail dsOrderDetail = null;
			decimal dTotal;
			blOrder.GetOrderDetail(10389,out dsOrderDetail,out dTotal);
			this.dgTest.DataSource = dsOrderDetail.OrderDetails;
			dgTest.DataBind();
			lbTotal.Text = dTotal.ToString();


		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}