private void LocalEntitiesOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
foreach (var newItem in e.NewItems)
{
var viewModel = _provider.GetEntityViewModel((TEntity)newItem);
EntityViewModels.Add(viewModel);
}
}
break;
case NotifyCollectionChangedAction.Remove:
{
var viewModelsToDelete = new List <EntityViewModelBase <TEntity> >();
foreach (var oldItem in e.OldItems)
{
viewModelsToDelete.Add(EntityViewModels.First(x => x.Entity.Equals(oldItem)));
}
foreach (var entityViewModel in viewModelsToDelete)
{
EntityViewModels.Remove(entityViewModel);
}
}
break;
}
}
public EntityListViewModel(
IUnityContainer container,
ViewModelsProvider provider)
: base(container)
{
container.RegisterInstance(this);
_provider = provider;
PropertyNames = provider.GetEntityViewModel <TEntity>().PropertyNames;
Filter = PropertyNames.FirstOrDefault();
EntityViewModels = new ObservableRangeCollection <EntityViewModelBase <TEntity> >();
var crud = container.Resolve <ICrud <TEntity> >();
if (crud.LocalEntities != null)
{
crud.LocalEntities.CollectionChanged += LocalEntitiesOnCollectionChanged;
foreach (var entity in crud.LocalEntities)
{
var viewModel = _provider.GetEntityViewModel(entity);
EntityViewModels.Add(viewModel);
}
}
CollectionView = (ListCollectionView)CollectionViewSource.GetDefaultView(EntityViewModels);
CollectionView.Filter = EntityFilter;
}