如何为集合中对象的特定属性设置属性更改事件

Question

I have an ObservableCollection which has objects. My requirement is I want to set Property Changed For a particular Property to trigger Collection Changed event.

I can set Property changed for the object like:

foreach (INotifyPropertyChanged prop in _baseColl)
{
 prop .PropertyChanged += prop_PropertyChanged;
}

prop_PropertyChanged()
{
//Will Refresh My Collection.
}

This case It will be called for all the properties in that Object.But i dont want that.

PS : I also Know that we can trigger the CollectionChanged By "Add","Remove","Move" etc..But i want another solution in my case.

Answer 1

All you can do if you're handling PropertyChanged is to check the "PropertyName";

prop_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
    if (e.PropertyName == "TheProperty")
    {
        //Will Refresh My Collection.
    }
}

This should be fine for most cases. If you want a more narrowly-targeted invocation, then you can always consider using a custom event -- have the source object raise that event only when the property you are interested in changes.