C#•11mo ago

✅ WPF IEnumerable PropertyChanged()

Hi, Any idea why my IEnumerable variable isn't refreshed even when the Onpropertychanged is triggered ? Here is the code : https://paste.mod.gg/xucezzpuabkj/3 note that the viewmodel is correctly bind to the view.

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2 Replies

Chiyoko_S•11mo ago

shouldn't it be ObservableCollection? oh never mind

ElioOP•11mo ago

if i do something like this, the code work but i don't understand why i should do it this way

public class ListingThicknessViewModel : ViewModelBase
{
    public ThicknessStore TTThicknessStore { get; }
 
    public IEnumerable<ThicknessViewModel>? Thicknesses => _thicknessStore.Thicknesses; // or Observable that it will do the same result 

    public ListingThicknessViewModel(ThicknessStore thicknessStore)
    {
        TTThicknessStore = thicknessStore;
            _thicknessStore.PropertyChanged += OnThicknessStorePropertyChanged;
    }
    private void OnThicknessStorePropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if(e.PropertyName == nameof(ThicknessStore.Thicknesses) ||
                e.PropertyName == nameof(MaterialStore.CurrentMaterial))
            {
                OnPropertyChanged(nameof(Thicknesses));
            }
        }
}

public class ListingThicknessViewModel : ViewModelBase
{
    public ThicknessStore TTThicknessStore { get; }
 
    public IEnumerable<ThicknessViewModel>? Thicknesses => _thicknessStore.Thicknesses; // or Observable that it will do the same result 

    public ListingThicknessViewModel(ThicknessStore thicknessStore)
    {
        TTThicknessStore = thicknessStore;
            _thicknessStore.PropertyChanged += OnThicknessStorePropertyChanged;
    }
    private void OnThicknessStorePropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if(e.PropertyName == nameof(ThicknessStore.Thicknesses) ||
                e.PropertyName == nameof(MaterialStore.CurrentMaterial))
            {
                OnPropertyChanged(nameof(Thicknesses));
            }
        }
}

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✅ WPF IEnumerable PropertyChanged()