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我想根据类型(类型AddPoint)过滤ObservableCollection到一个子集,并希望它按升序排序,没有重复.我的基类是ModelBase,w /子类AddPoint,Time,Repeat等...... ObservableCollection MotionSequenceCollection将以任何顺序填充这些类型,有些将是重复的.

我已经尝试了几次不同的时间,并在ICollectionView属性中显示它们,我从'拉出': 绑定集合的子集.

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private ObservableCollection<ModelBase> _motionSequenceCollection = 
        new ObservableCollection<ModelBase>();

    public ObservableCollection<ModelBase> MotionSequenceCollection
    {
        get
        {
            return _motionSequenceCollection;
        }

        set
        {
            if (_motionSequenceCollection == value)
            {
                return;
            }

            var oldValue = _motionSequenceCollection;
            _motionSequenceCollection = value;

            // Update bindings, no broadcast
            RaisePropertyChanged();
        }
    }

    public ICollectionView Location
    {
        get
        {
             var location = CollectionViewSource.GetDefaultView(_motionSequenceCollection);

            //DOES NOT WORK.  PROBLEM: GetType() creates type of system.type() and AddPoint, which don't work.  Need a cast, or something??  
            // found at https://stackoverflow.com/questions/9621393/bind-subset-of-collection …