private void cmdSimpleFlecheDroite_Click(object sender, RoutedEventArgs e)
        {
            if (grdListeArticle1.SelectedIndex != -1)
            {
                ArticleQTBE articleQt = new ArticleQTBE();
                ArticleBE   article   = ListeArticles1.ElementAt(grdListeArticle1.SelectedIndex);
                articleQt.codeArticle    = article.codeArticle;
                articleQt.codeCatArticle = article.codeCatArticle;
                articleQt.designation    = article.designation;
                articleQt.quantite       = 1;

                ListeArticles2.Add(articleQt);

                ListeArticles1.Remove(ListeArticles1.ElementAt(grdListeArticle1.SelectedIndex));
                grdListeArticle1.ItemsSource = ListeArticles1;
                grdListeArticle2.ItemsSource = ListeArticles2;
            }
        }
        private void cmdDoubleFlecheDroite_Click(object sender, RoutedEventArgs e)
        {
            if (ListeArticles1.Count != 0)
            {
                for (int i = 0; i < ListeArticles1.Count; i++)
                {
                    ArticleQTBE articleQt = new ArticleQTBE();
                    ArticleBE   article   = ListeArticles1.ElementAt(i);
                    articleQt.codeArticle    = article.codeArticle;
                    articleQt.codeCatArticle = article.codeCatArticle;
                    articleQt.designation    = article.designation;
                    articleQt.quantite       = 1;


                    ListeArticles2.Add(articleQt);
                }
                ListeArticles1.Clear();
                //RemplirDataGrid1(LArticleBE);
                grdListeArticle1.ItemsSource = ListeArticles1;
                grdListeArticle2.ItemsSource = ListeArticles2;
            }
        }