protected AddRemoveDetailEntitiesViewModel(IUnitOfWorkFactory <TUnitOfWork> unitOfWorkFactory, Func <TUnitOfWork, IRepository <TEntity, TPrimaryKey> > getRepositoryFunc, Func <TUnitOfWork, IRepository <TDetailEntity, TDetailPrimaryKey> > getDetailsRepositoryFunc, Func <TEntity, ICollection <TDetailEntity> > getDetailsFunc, TPrimaryKey id)
: base(unitOfWorkFactory, getRepositoryFunc, null)
{
this.getDetailsRepositoryFunc = getDetailsRepositoryFunc;
this.getDetailsFunc = getDetailsFunc;
SelectedEntities = new ObservableCollection <TDetailEntity>();
if (this.IsInDesignMode())
{
return;
}
LoadEntityByKey(id);
Messenger.Default.Register(this, (EntityMessage <TDetailEntity, TDetailPrimaryKey> m) =>
{
if (m.MessageType != EntityMessageType.Added)
{
return;
}
var withParent = m.Sender as ISupportParentViewModel;
if (withParent == null || withParent.ParentViewModel != this)
{
return;
}
var withEntity = m.Sender as SingleObjectViewModel <TDetailEntity, TDetailPrimaryKey, TUnitOfWork>;
var detailEntity = DetailsRepository.Find(DetailsRepository.GetPrimaryKey(withEntity.Entity));
if (detailEntity == null)
{
return;
}
DetailEntities.Add(detailEntity);
SaveChangesAndNotify(new TDetailEntity[] { detailEntity });
});
}
public virtual void EditDetailEntity()
{
if (SelectedEntities.Any())
{
var detailKey = DetailsRepository.GetPrimaryKey(SelectedEntities.First());
DocumentManagerService.ShowExistingEntityDocument <TDetailEntity, TDetailPrimaryKey>(this, detailKey);
}
}
public override void RemoveDetailEntities()
{
if (!SelectedEntities.Any())
{
return;
}
var entityKey = Repository.GetPrimaryKey(Entity);
foreach (var selectedEntity in SelectedEntities)
{
var detailKey = DetailsRepository.GetPrimaryKey(selectedEntity);
var junction = JunctionRepository.First(GetJunctionPredicate(entityKey, detailKey));
JunctionRepository.Remove(junction);
}
SaveChangesAndNotify(SelectedEntities);
SelectedEntities.Clear();
}
public override void AddDetailEntities()
{
var availableEntities = DetailsRepository.ToList().Except(DetailEntities).ToArray();
var selectEntitiesViewModel = new SelectDetailEntitiesViewModel <TDetailEntity>(availableEntities);
if (DialogService.ShowDialog(MessageButton.OKCancel, CommonResources.AddRemoveDetailEntities_SelectObjects, selectEntitiesViewModel) == MessageResult.OK && selectEntitiesViewModel.SelectedEntities.Any())
{
foreach (var selectedEntity in selectEntitiesViewModel.SelectedEntities)
{
var junction = new TJunction();
var entityKey = Repository.GetPrimaryKey(Entity);
var detailKey = DetailsRepository.GetPrimaryKey(selectedEntity);
var junctionType = typeof(TJunction);
junctionType.GetProperty(ExpressionHelper.GetPropertyName(getEntityForeignKey)).SetValue(junction, entityKey, null);
junctionType.GetProperty(ExpressionHelper.GetPropertyName(getDetailForeignKey)).SetValue(junction, detailKey, null);
JunctionRepository.Add(junction);
}
SaveChangesAndNotify(selectEntitiesViewModel.SelectedEntities);
}
}
protected void SaveChangesAndNotify(IEnumerable <TDetailEntity> detailEntities)
{
try
{
UnitOfWork.SaveChanges();
foreach (var detailEntity in detailEntities)
{
Messenger.Default.Send(new EntityMessage <TDetailEntity, TDetailPrimaryKey>(DetailsRepository.GetPrimaryKey(detailEntity), EntityMessageType.Changed));
}
Reload();
}
catch (DbException e)
{
MessageBoxService.ShowMessage(e.ErrorMessage, e.ErrorCaption, MessageButton.OK, MessageIcon.Error);
}
}
