private void btn_update_Click(object sender, EventArgs e)
 {
     Utils.WriteLog("Demande de modification de la fiche du " + current.DateDebut.ToShortDateString() + " de " + current.Employe.NomPrenom);
     if (Messages.Confirmation_Infos("modifier") == System.Windows.Forms.DialogResult.Yes)
     {
         current.DateFinPrevu  = dtp_date.Value;
         current.HeureFinPrevu = dtp_heure.Value;
         if (PresenceBLL.Update(current))
         {
             int idx = parent.presences.FindIndex(x => x.Id == current.Id);
             if (idx > -1)
             {
                 parent.presences[idx] = current;
             }
             Utils.WriteLog("-- Modification de la fiche du " + current.DateDebut.ToShortDateString() + " de " + current.Employe.NomPrenom + " reussie");
             this.Dispose();
         }
         else
         {
             Utils.WriteLog("-- Modification de la fiche du " + current.DateDebut.ToShortDateString() + " de " + current.Employe.NomPrenom + " échouée");
         }
     }
     else
     {
         Utils.WriteLog("-- Modification de la fiche du " + current.DateDebut.ToShortDateString() + " de " + current.Employe.NomPrenom + " annulée");
     }
 }