WPF + Caliburn Micro: how to catch Window Close event?
c#, caliburn.micro, wpf
Solution
What you can do is in your `View` you can attach `Caliburn Micro` by using
cal:Message.Attach="[Event Closing] = [Action OnClose($eventArgs)]"
So it will look like
<Window cal:Message.Attach="[Event Closing] = [Action OnClose($eventArgs)]">
And on your `ViewModel` you can just define a public method that says `OnClose` with `CancelEventArgs` as the parameter and you can handle it from there.
Problem
I am new in Caliburn Micro and learn it from this helloworld example. In the example there are only 2 views (.xaml) of type Application and UserControl, and 1 view model. I avoid to use code behind. Therefore I have only view and view model. I want to know how to catch the window close event of my helloworld application so I can handle it in view model. My target: when user is going to close the app by pressing close [x] button on top-right corner the app gives feedback to the user. I have read about IViewAware and IScreen, but I find no specific example related to my question. A simple sample code for view and view model are highly appreciated. Thanks in advance. PS. I use VS2013, C#.