How to get instances that get edited from observable collection? not added or removed-CodePudding

There is a observable collection in my class and I want to be notified when the observable collection changes.

I searched on stackoverflow and found this code

 private void CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            if (e.Action == NotifyCollectionChangedAction.Remove)
            {
                foreach (var item in e.OldItems)
                {
                    //Removed items
                    
                }
            }
            else if (e.Action == NotifyCollectionChangedAction.Add)
            {
                foreach (var item in e.NewItems)
                {
                    //Added items
                }
            }
            else if(e.Action == NotifyCollectionChangedAction.Replace){
                foreach (var item in e.NewItems)
                {

                }
            }
        }

Every thing was working fine. I get notified when something created and deleted. but I didnt get notified when an instance edited. what did I do wrong?

Edit: I changed the observable collection to binding list but nothing is happeng when I edit something.

 <ListView Grid.Row="1" ItemsSource="{Binding Contacts}">
        <ListView.View>
        <GridView>
            <GridView.Columns>
                <GridViewColumn>
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                                <TextBox Text={Binding Name}></TextBox>
                                <TextBox Text={Binding Email}><TextBox>
                            </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView.Columns>
        </GridView>
        </ListView.View>
    </ListView>

And my viewModel:

    private BindingList<ContactViewModel> _contacts;
    public IEnumerable<ContactViewModel> Contacts=>_contacts;
    public ContactListing()
    {
        _contacts.ListChanged  =_contacts_ListChanged;          

    }

    private void _contacts_ListChanged(object sender, ListChangedEventArgs e)
    {
        //Get Notified When somthing is edited
    }

in the xaml I have some texboxes that when the text of them changes, The binding list or observable collection also changes(I set a breakpoint and the list was changing everytime something edited) but the ListChanged event doesnot call.

CodePudding user response：

The collection element must implement INotifyPropertyChanged. And the collection needs to be replaced with

BaseInpc class from here: https://stackoverflow.com/a/67617794/13349759 .