延迟属性上从.net 4.5在.NET 4.0中绑定 [英] Delay property on Binding from .Net 4.5 in .Net 4.0

问题描述

如何实现从.net 4.5延迟性（说明<一href="http://msdn.microsoft.com/en-us/library/system.windows.data.bindingbase.delay%28v=vs.110%29.aspx">here)在.NET 4.0中绑定？

How can I implement Delay property from .Net 4.5 (described here) on binding in .Net 4.0?

我知道我不能从BindingBase继承的ProvideValue是密封的。

I know I cannot inherit from BindingBase as ProvideValue is sealed.

我可以实现的MarkupExtension但它意味着我现在不得不重写从BindingExtension所有属性是有没有其他办法？

I could implement MarkupExtension but it means I now have to rewrite all properties from BindingExtension is there any other way?

推荐答案

我想创建一个 AttachedProperty 指定的时间延时量。该 AttachedProperty 将开始（或复位）定时器，当绑定值的变化，并且将手动更新时的指定时间到达被绑定的源。

I would create an AttachedProperty that specifies the amount of time to Delay. The AttachedProperty would start (or reset) a timer when the bound value changes, and would manually update the bound source when the specified amount of time gets reached.

您可以使用下面的更新源绑定：

You can use the following to update the source binding:

BindingOperations.GetBindingExpressionBase(
    dependencyObject, dependencyProperty).UpdateSource();

修改

我今天改bug在一些老code，发现它使用附加的行为实施的延迟属性更改通知。我想到了这个问题，所以跟着我曾评论说，在code的连接，并发现自己在一个问题我已经发布了一段时间前就SO有关的延迟绑定。最多的回答就是我目前已经实现了，这是一些附加属性，更新的在X毫秒已通过绑定的来源。

I was fixing a bug in some old code today and noticed it implemented a delayed property change notification using an Attached Behavior. I thought of this question, so followed the link that I had commented in the code, and found myself at a question I had posted a while ago on SO about delaying a binding. The top answer is the one I have implemented currently, which is some attached properties that updates the source of a binding after X milliseconds have passed.

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