How to detect when window is closed when using Show() in WinForms C#

问题

I've been using ShowDialog() in following way for all my new Windows.

SomeGui test = new SomeGui();
test.ShowDialog();
refreshSomeListView();

However recently I've started to use Show() instead of ShowDialog() and it's working much better. The only drawback of this is that refreshSomeListView(); cannot be used like in example above since if i leave it there it's executed instantly when new Window shows up.

What's the best way to know that the user has closed test window and that now refreshSomeListView(); should be executed? What's suggested approach for this? Should it involve setting events in test GUI on Close/Closing or there's other / better method?

回答1:

You can subscribe to the Form.Closed event and perform refresh in its handler. Here is MSDN description of this event.

回答2:

In VB.Net:

Dim test as new SomeGui()
AddHandler test.Closed, AddressOf refreshSomeListView
test.Show

来源：https://stackoverflow.com/questions/2462105/how-to-detect-when-window-is-closed-when-using-show-in-winforms-c-sharp