The WPF-NHibernate Toolkit

using System;
using System.Text;
using System.Windows;
using System.Windows.Input;

namespace VmWrapperDemo.ViewModel
{
    public class ChangeCustomerNameCommand : ICommand
    {
        #region Fields

        // Member variables
        private MainWindowViewModel m_ViewModel;

        #endregion

        #region Constructor

        public ChangeCustomerNameCommand(MainWindowViewModel viewModel)
        {
            m_ViewModel = viewModel;
        }

        #endregion

        #region ICommand Members

        /// <summary>
        /// Whether this command can be executed.
        /// </summary>
        public bool CanExecute(object parameter)
        {
            return true;
        }

        /// <summary>
        /// Fires when the CanExecute status of this command changes.
        /// </summary>
        public event EventHandler CanExecuteChanged
        {
            add { CommandManager.RequerySuggested += value; }
            remove { CommandManager.RequerySuggested -= value; }
        }

        /// <summary>
        /// Invokes this command to perform its intended task.
        /// </summary>
        public void Execute(object parameter)
        {
            // Set customer name
            var customerNames = new string[]
                                    {
                                        "Sleepy Sonics", "Sneezy Snoozles",
                                        "Dopey Dentists", "Doc Hopper's", "Happy Haven", "Bashful Manor",
                                        "Grumpy Grocers"
                                    };
            var rnd = new Random();
            var n = rnd.Next(0, 6);

            var m = m_ViewModel.SelectedCustomer;
            var currentCustomer = m_ViewModel.Customers[m];
            var oldCustomerName = currentCustomer.Name;
            currentCustomer.Name = customerNames[n];

            // Show results in message box
            var sb = new StringBuilder();
            sb.Append(String.Format("Old customer name: {0}\r\n", oldCustomerName));
            sb.Append(String.Format("New view model customer name: {0}\r\n", currentCustomer.Name));
            sb.Append(String.Format("New domain model customer name: {0}\r\n", m_ViewModel.DomainCustomers[m].Name));
            var message = sb.ToString();
            var caption = "Customer Name Change";
            var buttons = MessageBoxButton.OK;
            var image = MessageBoxImage.Information;
            var result = MessageBox.Show(message, caption, buttons, image);
        }

        #endregion
    }
}