NHibernate Best Practices with ASP.NET, 1.2nd Ed.

using System;
using NHibernateSample.Core.DataInterfaces;
using NHibernateSample.Data;
using NHibernateSample.Core.Domain;

public partial class EditCustomer : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e) {
        if (!IsPostBack) {
            DisplayCustomerToEdit();
        }
    }

    private void DisplayCustomerToEdit() {
        IDaoFactory daoFactory = new NHibernateDaoFactory();
        ICustomerDao customerDao = daoFactory.GetCustomerDao();

        // No need to lock the customer since we're just viewing the data
        Customer customerToEdit = customerDao.GetById(Request.QueryString["customerID"], false);

        hidCustomerID.Value = customerToEdit.ID;
        lblCustomerID.Text = customerToEdit.ID;
        txtCompanyName.Text = customerToEdit.CompanyName;
        txtContactName.Text = customerToEdit.ContactName;

        // The Orders collection is lazy-loaded
        grdOrders.DataSource = customerToEdit.Orders;
        grdOrders.DataBind();
    }

    protected void btnUpdate_OnClick(object sender, EventArgs e) {
        IDaoFactory daoFactory = new NHibernateDaoFactory();
        ICustomerDao customerDao = daoFactory.GetCustomerDao();

        // Now that we're about to update the customer, be sure to lock the entity
        Customer customerToUpdate = customerDao.GetById(hidCustomerID.Value, true);

        // Changes to the customer object will be automatically committed at the end of the HTTP request
        customerToUpdate.CompanyName = txtCompanyName.Text;
        customerToUpdate.ContactName = txtContactName.Text;

        Response.Redirect("ViewCustomers.aspx?action=updated");
    }

    protected void btnCancel_OnClick(object sender, EventArgs e) {
        Response.Redirect("ViewCustomers.aspx");
    }
}