这是设计使用单向数据绑定时的。将附加的属性PresentationTraceSources.TraceLevel = High添加到绑定中，您将看到断开连接的时间。此链接也描述了问题（不提供任何解决方案）：在WPF中调试数据绑定

This is by design when using oneway data binding. Add the attached property PresentationTraceSources.TraceLevel=High to your binding and you will see when it gets disconnected. This link describes the problem as well (without offering any solution): Debugging Data Binding in WPF

我通常解决的方法是使用命令进行用户交互，并在后面进行代码更改，以改变控件的外观更改的属性。

The way I normally solve it is to use a command for user interaction and code behind to change the control appearance because of some changed properties.