private void ButtonDelete_Click(object sender, RoutedEventArgs e)
        {
            FormToSpList item = (FormToSpList)lvFormsToSpLists.SelectedItem;

            if ((FormToSpList)lvFormsToSpLists.SelectedItem != null && MessageBox.Show("Are you sure ? ", "Question", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.Yes)
            {
                ((Config)DataContext).FormsToSpLists.Remove(item);
            }
        }
 private void ButtonUpdate_Click(object sender, RoutedEventArgs e)
 {
     if (lvFormsToSpLists.SelectedItem != null)
     {
         FormToSpList item = (FormToSpList)lvFormsToSpLists.SelectedItem;
         item.DataMapping = item.DataMapping ?? new ObservableCollection <DataMapping>();
         var step2AddOrUpdate = new Step2AddOrUpdate();
         step2AddOrUpdate.DataContext     = item;
         step2AddOrUpdate.OpnedForNewItem = false;
         step2AddOrUpdate.Context         = ((Config)DataContext).SharepointConfig.Context;
         step2AddOrUpdate.Show();
         step2AddOrUpdate.FillCbBox();
     }
 }