RiaTasks: Central Silverlight Business Rules Validation

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Security;

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

        #region ddlUser_SelectedIndexChanged
        protected void ddlUser_SelectedIndexChanged(object sender, EventArgs e)
        {
            int intSelectedUser = Convert.ToInt32(ddlUser.SelectedValue);
            if (intSelectedUser > 0)
            {
                LogUserIntoSite(Convert.ToInt32(ddlUser.SelectedValue));
            }
            else
            {
                LogOut();
            }
        }
        #endregion

        #region LogUserIn
        private void LogUserIntoSite(int intUser)
        {
            // Log the user into the site
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1,
              intUser.ToString(),
              DateTime.Now,
              DateTime.Now.AddDays(30),
              false,
              "Role One",
              FormsAuthentication.FormsCookiePath);

            // Encrypt the ticket.
            string encTicket = FormsAuthentication.Encrypt(ticket);

            // Create the cookie.
            Response.Cookies.Add(new HttpCookie(FormsAuthentication.FormsCookieName, encTicket));

            // Show the Silverlight control
            silverlightControlHost.Visible = true;
        }
        #endregion

        #region LogOut
        protected void LogOut()
        {
            FormsAuthentication.SignOut();

            // Hide the Silverlight control
            silverlightControlHost.Visible = false;
        }
        #endregion
    }
}