WPF : How to set a Dialog position to show at the center of the application?

Question

How to set Dialog\'s position that came from .ShowDialog(); to show at the center of the mainWindows.

This is the way I try to set position.

Answer 1

For the child window, set at the XAML

WindowStartupLocation="CenterOwner"

To call your child window as a dialog and center of the parent, call it from the parent window, e.g

private void ConfigButton_OnClick(object sender, RoutedEventArgs e)
{
    var window = new ConfigurationWindow
    {
        Owner = this
    };
    window.ShowDialog();
}