Bind to Count of items in the DataContext

Question

I want to bind to the Count/amount of items within my DataContext.

I have an object, lets say person which has a List

as a property. I would

Answer 1

In my case, Robert's answer got me really close to what I was after. However, I'm adding many items to the list from a service call, and didn't want the event firing for each item. To this end, I took advantage of functionality already built into BindingList:

public class BindingListNotifyCount : BindingList, INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected override void OnListChanged(ListChangedEventArgs e)
    {
        base.OnListChanged(e);
        RaisePropertyChanged("Count");
    }

    protected void RaisePropertyChanged([CallerMemberName]string propertyName = "") =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}

Then I simply use it as:

displayItems.RaiseListChangedEvents = false;
serviceItems.ForEach(item => displayItems.Add(item));
displayItems.RaiseListChangedEvents = true;
displayItems.ResetBindings();