银光ObservableCollection:在UI线程上提高CollectionChanged [英] Silverlight & ObservableCollection: Raising CollectionChanged on UI thread

问题描述

我需要在UI线程上引发ObservableCollection的CollectionChanged事件.

I need to raise the CollectionChanged event of an ObservableCollection on the UI thread.

我看到了从包装器类到相关接口的自定义实现的各种方法.

I have seen different approaches ranging from a wrapper class to custom implementation of the relevant interface.

是否有任何简单的方法可以覆盖ObservableCollection上的INotifyCollectionChanged以实现此目的?

Is there any simple way to override INotifyCollectionChanged on an ObservableCollection to accomplish this?

谢谢.

推荐答案

最简单的方法是确保在UI线程上添加/删除集合中的项目.可以使用以下简短函数来完成此操作:

The simplest way to do this is to just ensure that you add/remove items from the collection on the UI thread. This can be done with a short function like this:

private void AddItemsToCollection(List<whatever> newItems)
{
    if (this.Dispatcher.CheckAccess()) 
    {
        newItems.ForEach(x => myObservableCollection.Add(x));
    }
    else 
        this.Dispatcher.BeginInvoke(new Action<List<whatever>>(AddItemsToCollection), newItems);
}

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