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Posted 28 Apr 2008

Navigational Workflows Unleashed in WWF/ASP.NET 3.5

, 21 Oct 2008
Case-study on the internals of a Navigational Workflow engine for a fictional dating website called “World Wide Dating”.
DateSite
App_Data
bin
database setup procedure
DateSite.csproj.user
Global.asax
images
complete.png
critical.png
logo2.png
warning.png
Profile.dbml
Profile.dbml.layout
Properties
Service References
NavigationWorkflow
bin
NavigationWorkflow.layout
Properties
using System;
using System.Web.UI.WebControls;

namespace DateSite
{
    /// <summary>
    /// Page for entering basic personal information.
    /// </summary>
    public partial class basics : System.Web.UI.Page
    {
        private WorkflowManager _workflowManager;
        private Profile _profile;

        /// <summary>
        /// Page initialization code.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Init(object sender, EventArgs e)
        {
            // create an instance of the navigational workflow manager
            _workflowManager = new WorkflowManager(Application, Session, Request, Response);

            // make sure the workflow is synchronized... meaning the page we are on is the page we should be on / can be on
            _workflowManager.SynchronizeWorkflow();

            // get the dating id from session
            string datingId = Session["datingId"] as string;

            // retrieve the given users profile
            _profile = Database.SelectProfile(datingId);

            // populate the data on the page
            LoadData();
        }

        /// <summary>
        /// Navigate to the next page in the navigational workflow.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnNext_Click(object sender, EventArgs e)
        {
            // save data to database
            SaveData();

            // navigate to the next page
            string pageToGoTo = _workflowManager.Next();
            _workflowManager.ManagedRedirect(pageToGoTo);
        }

        /// <summary>
        /// Load basic personal information from the database.
        /// </summary>
        private void LoadData()
        {
            if (_profile.LookingFor != null)
                ddlLookingFor.SelectedValue = _profile.LookingFor;

            if (_profile.StartAge != null)
                ddlStartAge.SelectedValue = _profile.StartAge;

            if (_profile.EndAge != null)
                ddlEndAge.SelectedValue = _profile.EndAge;

            if (_profile.Feet != null)
                ddlFeet.SelectedValue = _profile.Feet;

            if (_profile.Inches != null)
                ddlInches.SelectedValue = _profile.Inches;
        }

        /// <summary>
        /// Save the basic personal information to the database.
        /// </summary>
        private void SaveData()
        {
            _profile.LookingFor = ddlLookingFor.SelectedValue;
            _profile.StartAge = ddlStartAge.SelectedValue;
            _profile.EndAge = ddlEndAge.SelectedValue;
            _profile.Feet = ddlFeet.SelectedValue;
            _profile.Inches = ddlInches.SelectedValue;

            Database.UpdateProfile(_profile);
        }
    }
}

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About the Author

Pero Matić
Founder Turing Inc.
United States United States

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