Navigational Workflows Unleashed in WWF/ASP.NET 3.5

using System;
using System.Workflow.Activities;

namespace DateSiteNavigation
{
    /// <summary>
    /// Defines the contract for the navigational workflow.
    /// </summary>
    [ExternalDataExchange]
	public interface INavigationService
	{
        /// <summary>
        /// Navigate to the previous step.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> Previous;

        /// <summary>
        /// Navigate to the next step.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> Next;

        /// <summary>
        /// Rehydrate a given workflow.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> Rehydrated;        

        /// <summary>
        /// Sent to the navigational workflow to ask it if it is in sync.
        /// </summary>
        event EventHandler<IncomingSynchronizeEventArgs> IncomingSynchronize;

        /// <summary>
        /// Raise a specific error.
        /// </summary>
        event EventHandler<ErrorEventArgs> Error;        

        /// <summary>
        /// Skip to the basics state.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> SkipToBasics;

        /// <summary>
        /// Skip to the appearance state.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> SkipToAppearance;

        /// <summary>
        /// Skip to the lifestyle state.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> SkipToLifestyle;
        
        /// <summary>
        /// Skip to the interests state.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> SkipToInterests;

        /// <summary>
        /// Skip to the complete state.
        /// </summary>
        event EventHandler<ExternalDataEventArgs> SkipToComplete;
        
        /// <summary>
        /// Send a message to the host application of which page to go to.
        /// </summary>
        /// <param name="args"></param>
        void OnPageToGoTo(PageToGoToEventArgs args);

        /// <summary>
        /// Sends a message to host application indicating whether or not the 
        /// workflow is in sync and if not, what needs to be done to synchronize it.
        /// </summary>
        /// <param name="args"></param>
        void OnOutgoingSynchronize(OutgoingSynchronizeEventArgs args);        
	}
}