MVC Basic Site: Step 2 - Exceptions Management

#region Copyright (c) 2013 Raul Iloc
/*
{***************************************************************************}
{                                                                           }
{       Copyright (c) 2010  RAUL ILOC (rauliloc@yahoo.com)                  }
{       ALL RIGHTS RESERVED                                                 }
{                                                                           }
{   THE WORK IS PROVIDED UNDER THE TERMS OF THIS CODE PROJECT OPEN LICENSE. }
{   THE WORK IS PROTECTED BY COPYRIGHT AND/OR OTHER APPLICABLE LAW.         }
{   ANY USE OF THE WORK OTHER THAN AS AUTHORIZED UNDER THIS LICENSE         }
{   OR COPYRIGHT LAW IS PROHIBITED.                                         }
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{  AGREE TO BE BOUND BY THE TERMS OF THIS LICENSE. THE AUTHOR GRANTS YOU    }
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{  TERMS OF THIS LICENSE, YOU CANNOT MAKE ANY USE OF THE WORK.              }
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*/
#endregion Copyright (c) 2013 Raul Iloc
using System;
using System.Web.Mvc;
//
using MvcBasicSite.Models;
using MvcBasic.Logic;

namespace MvcBasicSite.Controllers
{
    /// <summary>
    /// Defines the base controller.
    /// </summary>
    /// <remarks>
    /// This is the base class for all site's controllers.
    /// </remarks>
    public class BaseController : Controller
    {
        /// <summary>
        /// Gets the current site session.
        /// </summary>
        public SiteSession CurrentSiteSession
        {
            get
            {
                SiteSession siteSession = (SiteSession)this.Session["SiteSession"];
                return siteSession;
            }
        }
        /// <summary>
        /// The data context.
        /// </summary>
        protected MvcBasicSiteEntities _db = new MvcBasicSiteEntities();
        /// <summary>
        /// Disable the Async support.
        /// </summary>
        /// <remarks>
        /// Must be diable, otherwise ExecuteCore() will not be invoked in MVC4 like was in MVC3!
        /// </remarks>
        protected override bool DisableAsyncSupport
        {
            get { return true; }
        }

        /// <summary>
        /// Dispose the used resource.
        /// </summary>
        /// <param name="disposing">The disposing flag.</param>
        protected override void Dispose(bool disposing)
        {
            _db.Dispose();
            base.Dispose(disposing);
        }

        /// <summary>
        /// Manage the internationalization before to invokes the action in the current controller context.
        /// </summary>
        protected override void ExecuteCore()
        {
            int culture = 0;
            if (this.Session == null || this.Session["CurrentUICulture"] == null)
            {
                int.TryParse(System.Configuration.ConfigurationManager.AppSettings["Culture"], out culture);
                this.Session["CurrentUICulture"] = culture;
            }
            else
            {
                culture = (int)this.Session["CurrentUICulture"];
            }
            //
            SiteSession.CurrentUICulture = culture;
            //
            // Invokes the action in the current controller context.
            //
            base.ExecuteCore();
        }

        /// <summary>
        /// Called when an unhandled exception occurs in the action.
        /// </summary>
        /// <param name="filterContext">Information about the current request and action.</param>
        protected override void OnException(ExceptionContext filterContext)
        {
            if (filterContext.Exception is UnauthorizedAccessException)
            {
                //
                // Manage the Unauthorized Access exceptions
                // by redirecting the user to Home page.
                //
                filterContext.ExceptionHandled = true;
                filterContext.Result = RedirectToAction("Home", "Index");
            }
            //
            base.OnException(filterContext);
        }

    }
}