c# - 通知ViewModel模型集合已更改

Question

我有一个模型集合，该模型集合在我的大部分代码中都被引用。

public class TraceEntryQueue
    {
        private readonly Queue<TraceEntry> _logEntries; 

        public TraceEntryQueue()
        {
            _logEntries = new Queue<TraceEntry>();
        }

        public void AddEntry(TraceEntry newEntry)
        {
            _logEntries.Enqueue(newEntry);

        }

        public List<TraceEntry> GetAsList()
        {
            return _logEntries.ToList();
        }
    }

此收藏集是我的观点之一。

public class LoggingViewModel : ViewModelBase
    {
        private ICollectionView _customers;
        public ICollectionView Customers
        {
            get
            {
                return _customers;
            }
            private set
            {
                _customers = value;

            }
        }

        public LoggingViewModel(TraceEntryQueue traceQueue)
        {

            Customers = CollectionViewSource.GetDefaultView(traceQueue.GetAsList());
            Customers.SortDescriptions.Add(new SortDescription("Index", ListSortDirection.Descending));
            Customers.Refresh();
        }
    }

问题是当我通过添加新条目时，如何通知我的 View 重新加载集合

            public void AddEntry(TraceEntry newEntry)
            {
                _logEntries.Enqueue(newEntry);

            }

Answer 1

使用可观察的集合而不是队列。当集合更新(添加/删除等)时，这将自动通知您的 View

public class TraceEntryQueue
{
    private readonly ObservableCollection<TraceEntry> _logEntries; 

    public TraceEntryQueue()
    {
        _logEntries = new ObservableCollection<TraceEntry>();
    }

    public void AddEntry(TraceEntry newEntry)
    {
        _logEntries.Add(newEntry);
    }

    public ObservableCollection<TraceEntry> GetLogEntries()
    {
        return _logEntries;
    }
}