C＃新窗口焦点

Question

My program contains a listview with "SelectionChanged" event. When I'm changing the selected item in the list view I want to open a new window with specific options related to it. But the problem is that the new window appears for a moment and it hides behind the main window. This is a part of my code:

private void display_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var editwindow = new EditWindow();
        editwindow.Show();
        editwindow.Focus();
    }

I've also include Focus function in second window when it's initiated. How I could solve this problem?

Answer 1

Trying to change the focus while an event is fired is often troublesome, it is here. You'd need a PostSelectionChanged event but that's not available. You can create your own though, Dispatcher.BeginInvoke() can run the target after all the event processing is completed. This solves your problem:

private void display_SelectionChanged(object sender, SelectionChangedEventArgs e) {
    Dispatcher.BeginInvoke(new Action(() => {
       var editwindow = new EditWindow();
       editwindow.Show();
    }));
}

Answer 2

使用Activate（）函数：

editWindow.Activate();