public override bool CanExecute(IEntitySetExtensionContext context) { SelectionState selectionState = context.SelectionState; if (selectionState.IsEmpty()) { return(false); } if (!_transition.MultipleSelectionEnabled && selectionState.IsMultiple()) { return(false); } IList <IEntityPresenter> selection = context.GetSelectedItems(); if (selection.Count == 0 || (!_transition.MultipleSelectionEnabled && selection.Count != 1)) { return(false); } return(WorkflowService.CanExecute(_transition, selection.SelectMany(item => GetEntities(item)), context)); }
public override async void Execute(IEntitySetExtensionContext context) { IList <IEntityPresenter> items = context.GetSelectedItems(); HashSet <Guid> guids = new HashSet <Guid>(); EntitySet entitySet = null; foreach (IEntityPresenter item in items) { foreach (Entity entity in GetEntities(item)) { if (entity == null) { return; } if (entitySet == null) { entitySet = entity.EntitySet; } else if (entitySet.Scheme.Guid != entity.EntitySetGuid) { return; } guids.Add(entity.Guid); } } var saveResult = await context.PropertiesView?.SaveAsync(); if (guids.Count == 0) { return; } List <Entity> entities = new List <Entity>(guids.Count); foreach (Entity entity in entitySet.Find(guids, context.EntitiesView?.EntityLoadParameters) ?? Enumerable.Empty <Entity>()) { if (guids.Remove(entity.Guid)) { entities.Add(entity); } else { throw new ApplicationException(); } } if (guids.Count > 0) { throw new ModelException(ErrorLevel.Warning, "Выбранные объекты были изменены или удалены. Обновите окно и попробуйте сменить стадию ещё раз."); } DataTransaction transaction = null; try { transaction = await WorkflowService.ChangeStageAsync(_transition, entities, saveResult?.ExtensionContext ?? context); if (transaction != null) { context.Update(transaction); } } finally { if (transaction == null) { if (context.EntitiesView == null) { context.PropertiesView?.Refresh(); } else { context.EntitiesView.Update(entities); } } } }