/// <summary>
/// Remove item from EntityNavigationItemViewModels list,
/// when a Deleted event in a created Entity DetailViewModel was fired
/// </summary>
/// <param name="eventAfterDetailDeletedArgs"></param>
public void OnEventAfterDetailDeleted(EventAfterDetailDeletedArgs eventAfterDetailDeletedArgs)
{
if (eventAfterDetailDeletedArgs.ViewModelName == NameOfDetailViewModel())
{
var entityNavigationItemViewModel = EntityNavigationItemViewModels.SingleOrDefault(k => k.Id == eventAfterDetailDeletedArgs.Id);
if (entityNavigationItemViewModel != null)
{
EntityNavigationItemViewModels.Remove(entityNavigationItemViewModel);
}
}
}
/// <summary>
/// Creates a list of NavigationItemViewModel representing the Entities to navigate through.
/// </summary>
/// <returns>True, when craetion was succesfull</returns>
/// <remarks>
/// The list of items are created by using the constructor parameter entityLookupDataService.
/// The function entityLookupDataService.GetEntityLookupAsync() returns a list of TEntity.
/// From TEntity.Id (unique identifier of a TEntity),
/// TEntity.DisplayMember (string representing the display member of TEntity in the UI),
/// NameOfDetailViewModel() (Name of the DetailViewModel in which TEntity will be displyed in the UI)
/// and the constructor EventAggregator parameter
/// a list of items of type NavigationItemViewModel will be created.
/// </remarks>
protected async Task <bool> LoadAsyncBase()
{
//TODO Write unit test
//TODO Write integration test
var lookupItems = await _entityLookupDataService.GetEntityLookupAsync();
EntityNavigationItemViewModels.Clear();
foreach (var lookupItem in lookupItems)
{
EntityNavigationItemViewModels.Add(
new NavigationItemViewModel
(
lookupItem.Id,
lookupItem.DisplayMember,
NameOfDetailViewModel(),
EventAggregator)
);
}
return(true);
}
