使用“关闭”（x）按钮关闭窗口如果我已经触发了“关闭事件”？

Question

我已经在窗口上设置了关闭事件，如果我的验证失败，则会显示消息，但是我想关闭顶部带有X按钮的窗口，而他做了同样的事情，向我展示了如何避免这种情况并在X按钮上关闭窗口，我可以吗？使用此按钮绕过关闭事件我不在做MVVM应用程序吗？

Answer 1

You can indeed use the Closing event to hook up some validation. This event fires whenever the window is about to close, whether by calling Close() , using the "X" close button or hitting Alt + F4 . This event can also be cancelled which would leave the window open.

For example:

class MyWindow : Window
{
    protected override void OnClosing(CancelEventArgs e)
    {
        base.OnClosing(e);

        e.Cancel = !IsValid(); // your validation code
    }
}