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);
}
}
}
}