Move from IReactiveDerivedList to DynamicData - dynamic-data

Question

Has simple code in old version of ReactiveUI:
var allItems = new ObservableCollection<Model>(items);
var filteredItems = allItems.CreateDerivedCollection(
x => x,
Filter,
Comparer.Compare);
where Filter and Compare has simple signatures:
private bool Filter(Model item)
public int Compare(Model x, Model y)
sometimes i change items in other threads (big changes, without INPC) or change Filter\Compare strategies and just do filteredItems.Reset();
In DynamicData i try to:
ReadOnlyObservableCollection<Model> filteredItems;
var allItems = new ObservableCollection<Model>(items);
var cancellation = allItems
.ToObservableChangeSet()
.Filter(Filter)
.Sort(Comparer)
.ObserveOn(SynchronizationContext.Current)
.Bind(out filteredItems)
.DisposeMany()
.Subscribe();
but not found, how to Reset this^ or filteredItems.

Answer 1

Wish I were able to give you a direct answer, but I'm rather new to ReactiveUI. Managed to use DynamicData for something and thought you wouldn't mind this sharing.
If what I say later doesn't help you, here are the most relevant resources I could find:
https://floatingcube.com/blog/convert-reactive-list-to-dynamic-data/
https://github.com/reactiveui/DynamicData/wiki/Introduction-for-ReactiveUI-users
https://github.com/reactiveui/DynamicData/issues/182
https://habr.com/en/post/454074/
In my case I used SourceList or SourceCache as type for something similar to your allItems.
SourceCache<Model, string> allItems =
new SourceCache<Model, string>(m => m.Id);
// assuming each model has unique id; if it doesn't then use SourceList
I'd then have a BindingList<Model> as type for something simlar to your 'filteredItems'.
BindingList<Model> filteredItems = new BindingList<Model>();
The binding should be something like:
allItems
.Connect()
...
.ObserveOn(...)
.Bind(filteredItems)
.Subscribe();
To bulk-edit the list I'd call something like
allItems.Edit(
innerList => {
innerList.Clear();
// edit
// innerList.AddOrUpdate(...);
});
Cheers !