wpf：设置 DataContext 时触发 TextChanged 事件
我有一个带有单个文本框的简单视图，该文本框将数据绑定到带有单个字符串属性的简单 ViewModel。
我需要捕获该文本框的 TextChanged 事件，以便我可以执行一些验证魔法。
我遇到的问题是，当为视图设置 DataContext 时，会为该文本框触发 TextChanged 事件。
是否有一个标准机制可以用来确定事件是否由于设置了 DataContext 以及用户进行更改而触发？
谢谢！
I've got a simple View with a single textbox that gets databound to a simple ViewModel with a single string property.
I need to catch the TextChanged event of that textbox so that I can do a little validation magic.
The problem that I am running into is that the TextChanged event fires for that textbox when the DataContext is set for the View.
Is there a standard mechanism that I can use to determine if the event is firing because of the DataContext being set versus when the user is making changes?
Thanks!
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据我所知没有这样的机制。相反，您应该做的是使用 WPF 的标准方法来执行验证魔法。请参阅以下链接：http://msdn.microsoft.com/en -us/library/ms752347.aspx#data_validation。
不管怎样，只要你使用 MVVM，你总是可以检测到视图模型中绑定属性的 setter 中的文本发生了变化。
As far as I know there is no such mechanism. What you should do instead is to do your validation magic using standard means of WPF. Please see the following link: http://msdn.microsoft.com/en-us/library/ms752347.aspx#data_validation.
Anyway, as long as you use MVVM you can always detect that text has changed in the setter of the bound property in your view model.