WPF - OnPropertyChanged for a property within a collection

Question

In a view model, I have a collection of items of type \"ClassA\" called \"MyCollection\". ClassA has a property named \"IsEnabled\".

class MyViewModel 
{
           


        

Answer 1

ClassA needs to implement INotifyPropertyChanged :

class ClassA : INotifyPropertyChanged
{
    private bool _isEnabled;
    public bool IsEnabled
    {
        get { return _isEnabled; }
        set
        {
            if (value != _isEnabled)
            {
                _isEnabled = value;
                OnPropertyChanged("IsEnabled");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

EDIT: and use an ObservableCollection like Scott said

EDIT2: made invoking PropertyChanged event shorter