跟踪用户控件的datacontext是否会导致属性更改事件触发？

Question

I have a user control on which I am planning to switch out the datacontext on certain events. The control has several text boxes and a list view, etc.. etc... The question is will simply saying view.DataContext = new viewModel(); be enough? or will have have to tell all of the property changed events to fire?

Thanks

Answer 1

是的，如果UI控件后面的DataContext发生更改，WPF将自动更新UI绑定。

Answer 2

Yes. However - you need to consider the scope of the data context change for performance reasons. If your context change affects the entire form - it could slow down the application. Use the profiling tools for WPF to see the affects of this.