SHJX_GM/SHJX.Service.Common/ElementHelper/DialogCloseHelper.cs

using System.Windows;

namespace SHJX.Service.Common.ElementHelper
{
    public static class DialogCloseHelper
    {
        public static readonly DependencyProperty DialogResultProperty =
            DependencyProperty.RegisterAttached(
                "DialogResult",
                typeof(bool?),
                typeof(DialogCloseHelper),
                new PropertyMetadata(DialogResultChanged));

        private static void DialogResultChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is Window window)
            {
                window.DialogResult = e.NewValue as bool?;
            }
        }

        public static void SetDialogResult(Window target, bool? value)
        {
            target.SetValue(DialogResultProperty, value);
        }
    }
}