Synchronization mechanism for an observable object

Question

Let\'s imagine we have to synchronize read/write access to shared resources. Multiple threads will access that resource both in read and writing (most of times for reading, some

Answer 1

Cross-Thread Collection Synchronization

Putting a ListBox binding to a ObservableCollection , when the data changes , you update the ListBox because INotifyCollectionChanged implemented . The defect dell'ObservableCollection is that the data can be changed only by the thread that created it.

The SynchronizedCollection does not have the problem of Multi-Thread but does not update the ListBox because it is not implemented INotifyCollectionChanged , even if you implement INotifyCollectionChanged , CollectionChanged (this, e) can only be called from the thread that created it .. so it does not work.

Conclusion

-If you want a list that is autoupdated mono-thread use ObservableCollection

-If you want a list that is not autoupdated but multi-threaded use SynchronizedCollection

-If you want both, use Framework 4.5, BindingOperations.EnableCollectionSynchronization and ObservableCollection () in this way :

/ / Creates the lock object somewhere
private static object _lock = new object () ;
...
/ / Enable the cross acces to this collection elsewhere
BindingOperations.EnableCollectionSynchronization ( _persons , _lock )

The Complete Sample http://10rem.net/blog/2012/01/20/wpf-45-cross-thread-collection-synchronization-redux