protected void btnPastOrders_Click(object sender, EventArgs e)
{
UserAccount user = (UserAccount)Session["UserAccountObj"];
OrdersBLL ordersBLL = new OrdersBLL();
DataTable dt = new DataTable();
dt = ordersBLL.DoRetrieveCustomerCompletedOrder(user.UserId);
gv_pastOrders.DataSource = dt;
gv_pastOrders.DataBind();
gv_pastOrders.Visible = true;
}