private void Button_Chercher(object sender, RoutedEventArgs e) { Client c = _daoClient.SearchClient(TextBox_Prenom.Text, TextBox_Nom.Text, TextBox_Email.Text); if (c.Id != 0) { InfosClient wnd = new InfosClient(c, _dbal); wnd.Show(); Close(); } else { MessageBox.Show("Ce client n'existe pas"); } }