fichecollege/CD67.FicheCollege.MVC/Controllers/HomeController.cs

using CD67.FicheCollege.Entity;
using System;
using System.Linq;
using System.Web.Mvc;

namespace CD67.FicheCollege.MVC.Controllers
{
    public class HomeController : Controller
    {
        private Entities db = new Entities();

        // GET: Home
        public ActionResult Index()
        {
            string annee_lib;

            if (DateTime.Now.Month <= 6) {
                annee_lib = String.Format("{0}-{1}", DateTime.Now.Year - 1, DateTime.Now.Year);
            }
            else {
                annee_lib = String.Format("{0}-{1}", DateTime.Now.Year, DateTime.Now.Year + 1);
            }

            int annee_id = db.Annees.Where(a => a.Libelle == annee_lib).First().Id;

            return RedirectToActionPermanent("Details", "Annees", new { id = annee_id });
        }
    }
}