How do I update an ObservableCollection via a worker thread?

Question

I\'ve got an ObservableCollection a_collection; The collection contains \'n\' items. Each item A looks like this:

public class A : INot         


        

Answer 1

Collection synchronization code for posterity. This uses simple lock mechanism to enable collection sync. Notice that you'll have to enable collection sync on the UI thread.

public class MainVm
{
    private ObservableCollection _collectionOfObjects;
    private readonly object _collectionOfObjectsSync = new object();

    public MainVm()
    {

        _collectionOfObjects = new ObservableCollection();
        // Collection Sync should be enabled from the UI thread. Rest of the collection access can be done on any thread
        Application.Current.Dispatcher.BeginInvoke(new Action(() => 
        { BindingOperations.EnableCollectionSynchronization(_collectionOfObjects, _collectionOfObjectsSync); }));
    }

    /// 

    /// A different thread can access the collection through this method
    /// 
    /// The new mini vm to add to observable collection
    private void AddMiniVm(MiniVm newMiniVm)
    {
        lock (_collectionOfObjectsSync)
        {
            _collectionOfObjects.Insert(0, newMiniVm);
        }
    }
}