ItemsControl SourceUpdated无法触发 [英] ItemsControl SourceUpdated not firing

问题描述

我有一个ItemsControl绑定到这样的集合:

I have an ItemsControl that is bound to a collection like so:

<ItemsControl ItemsSource="{Binding Path=AllComponents, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" x:Name="myItemsControl" SourceUpdated="Components_Updated">

事件处理程序:

Event Handler:

private void Components_Updated(object sender, DataTransferEventArgs e)
        {
            //stuff goes here
        }

唯一的问题是，当我向集合中添加内容时，SourceUpdated事件永远不会触发.我的处理程序永远不会被呼叫.

有人知道如何解决此问题吗?

The only problem is that the SourceUpdated event never fires when I add something to the collection. My handler never gets called.

Anyone know how to fix this?

推荐答案

是否有PreviewSourceUpdated?我发现总是调用Preview事件，但不是调用该事件，因为树上的某个东西可以阻止它们.

Is there a PreviewSourceUpdated ? I found that the Preview events are always called, but the events are not, because something higher up the tree can stop them.

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