Refresh observable dictionary , listbox in wpf

I bind generic observable dictionary on listbox control in WPF app. I get every 5 sec new fresh data as observable dictionary.

I would like refresh with this new dictionary listbox in wpf app.

My soulution is :

//this dic is bind on listbox
        private MyObservableDictionary<string, Friend> _friends;

//new data
        private MyObservableDictionary<string, Friend> _freshFriends开发者_运维问答;

....

//get data from server
            _freshFriends = _service.LoadFriends(Account);


            _friends.Clear();

//refresh dic
            foreach (var freshFriend in _freshFriends)
            {
                _friends.Add(freshFriend);
            }

My soulution works good, but exist any simple and nice way ? Thank for ideas.

Implement INotifyPropertyChanged (It makes anything "observable") so WPF knows when you directly assign to the friends list. In other words, make your friends list a property instead of a field and fire the PropertyChanged delegate on the set block :)

Hope that helps, read the link you will find more info there. Comment if you have any questions.

Since you have your own MyObservableDictionary, you could implement an AddRange function to it and just call it like this: _friends.AddRange(_freshFriends); This could reduce code duplication if you wanted to add other collections as well.