Master Pages and Factory Pattern

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// This will control the opertaion when user selects OrderDetail from the menu
/// </summary>
public class BIOrderMaster : Base
{
    private DAccessOrder Orders = new DAccessOrder();
    private DataSet dsParent = new DataSet();


    public BIOrderMaster()
	{
        dsParent = Orders.getOrders();

	}

    public override void BindParentGrid(DataDigest.WebControls.GridView gvParent)
    {
        if (dsParent == null)
        {
            dsParent = Orders.getOrders();
        }
        string[] key = new string[1];
        key[0] = "OrderID";
        gvParent.DataSource = null;
        gvParent.Columns.Clear();
        //if (dsParent.Tables["TtlCoGeneral"].Rows.Count == 0)
        //{
        //    AddDummyData(dsParent);
        //}
        gvParent.DataSource = dsParent;
        gvParent.DataKeyNames = key;
        BoundField TtlCoNm = new BoundField();
        TtlCoNm.DataField = "OrderID";
        TtlCoNm.HeaderText = "Order ID";
        gvParent.Columns.Add(TtlCoNm);
        TtlCoNm.ItemStyle.Width = 600;

        gvParent.DataBind();
    }

    public override void BindChildGrid(DataDigest.WebControls.GridView gvChild, string ParentId)
    {
        string[] key = new string[1];
        key[0] = "ProductID";

        DataSet dsChild = Orders.getProducts(ParentId);
        gvChild.SelectedIndex = -1;
        gvChild.DataSource = null;
        gvChild.Columns.Clear();
        //if (dsBranch.Tables["TtlCoBranch"].Rows.Count == 0)
        //{
        //    AddDummyData(dsBranch);
        //}
        gvChild.DataSource = dsChild;
        gvChild.DataKeyNames = key;
        BoundField BrName = new BoundField();
        BrName.DataField = "ProductName";
        BrName.HeaderText = "Product Name";
        gvChild.Columns.Add(BrName);
        BrName.ItemStyle.Width = 600;
        gvChild.DataBind();
    }

    public override DataSet getParentData()
    {
        return dsParent;
    }

    public override DataSet getChildData(string Key)
    {
        return Orders.getProducts(Key);
    }

    //private void AddDummyData(DataSet ds)
    //{
    //    // Add a dummy row
    //    DataTable dt = ds.Tables[0];
    //    DataRow newRow = dt.NewRow();
    //    dt.Rows.Add(newRow);

    //}


}