public ActionResult AddFederation(string nomFederation, int?Pays, string web)
        {
            string     pays       = Pays.ToString();
            Federation federation = new Federation();

            nomFederation = HttpUtility.HtmlEncode(nomFederation);
            web           = HttpUtility.HtmlEncode(web);
            if (Pays != null && nomFederation != "" && web != "")
            {
                federation.AddFederation(nomFederation, pays, web);
                return(Redirect("Index"));
            }
            else
            {
                return(Redirect("Index?error=Tous les champs doivent être complétés"));
            }
        }