/// <summary>
/// Used for chained subscriptions sample:
/// source.ObservePropertyChangedWithValue(x => x.Collection, true)
/// .ItemPropertyChanged(x => x.Name)
/// </summary>
/// <typeparam name="TItem"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="source"></param>
/// <param name="property"></param>
/// <returns></returns>
public static IObservable <EventPattern <ItemPropertyChangedEventArgs <TItem, TProperty> > > ItemPropertyChanged <TItem, TProperty>(
this IObservable <EventPattern <PropertyChangedAndValueEventArgs <ReadOnlyObservableCollection <TItem> > > > source,
Expression <Func <TItem, TProperty> > property)
where TItem : class, INotifyPropertyChanged
{
var observable = new ItemsObservable <ReadOnlyObservableCollection <TItem>, TItem, TProperty>(source, property);
return(observable);
}
protected override async void OnDeleteItem(object commandParameter)
{
ValidationErrors = null;
if (SelectedItem != null && SelectedItemIndex.HasValue)
{
try
{
await _studentService.Delete(SelectedItem.Student.Id);
Students.RemoveAt(SelectedItemIndex.Value);
ItemsObservable.Remove(SelectedItem);
}
catch (ValidationPropertyException vpe)
{
ValidationErrors = vpe.ErrorsList.ToList();
}
catch (ValidationException ve)
{
ValidationErrors = ve.Errors.ToList();
}
}
}
