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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Threading;
namespace WpfApplication1
{
public class AsyncObservableCollection<T> : ObservableCollection<T>
{
private readonly SynchronizationContext _synchronizationContext = SynchronizationContext.Current;
public AsyncObservableCollection()
{
}
public AsyncObservableCollection(IEnumerable<T> list)
: base(list)
{
}
private void ExecuteOnSyncContext(Action action)
{
if (SynchronizationContext.Current == _synchronizationContext)
{
action();
}
else
{
_synchronizationContext.Send(_ => action(), null);
}
}
protected override void InsertItem(int index, T item)
{
ExecuteOnSyncContext(() => base.InsertItem(index, item));
}
protected override void RemoveItem(int index)
{
ExecuteOnSyncContext(() => base.RemoveItem(index));
}
protected override void SetItem(int index, T item)
{
ExecuteOnSyncContext(() => base.SetItem(index, item));
}
protected override void MoveItem(int oldIndex, int newIndex)
{
ExecuteOnSyncContext(() => base.MoveItem(oldIndex, newIndex));
}
protected override void ClearItems()
{
ExecuteOnSyncContext(() => base.ClearItems());
}
}
}
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