YwxApp.AiChat/Commands/ClosingWindowBehavior.cs

using Microsoft.Xaml.Behaviors;
using System.ComponentModel;
using System.Windows;
using System.Windows.Input;
namespace YwxApp.AiChat.Commands
{

   
        /// <summary>
        /// Close Window Behavior
        /// </summary>
        public class ClosingWindowBehavior : Behavior<Window>
        {
            public static readonly DependencyProperty CommandProperty =
                DependencyProperty.Register("Command", typeof(ICommand), typeof(ClosingWindowBehavior), new PropertyMetadata(null));

            public static readonly DependencyProperty CommandParameterProperty =
                DependencyProperty.Register("CommandParameter", typeof(object), typeof(ClosingWindowBehavior), new PropertyMetadata(null));

            public ICommand Command
            {
                get { return (ICommand)GetValue(CommandProperty); }
                set { SetValue(CommandProperty, value); }
            }

            public object CommandParameter
            {
                get { return GetValue(CommandParameterProperty); }
                set { SetValue(CommandParameterProperty, value); }
            }

            protected override void OnAttached()
            {
                base.OnAttached();
                AssociatedObject.Closing += OnClosing;
            }

            protected override void OnDetaching()
            {
                base.OnDetaching();
                AssociatedObject.Closing -= OnClosing;
            }

            private void OnClosing(object sender, CancelEventArgs e)
            {
                if (Command != null && Command.CanExecute(CommandParameter))
                {
                    Command.Execute(e);
                }
            }
        }
    }