【WPF】淡入淡出切换页面

<NavigationWindow x:Class="WpfApplication1.Window1"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Title="Switch page with transition" Height="512" Icon="icon1.ico"

                  Width="958" ShowsNavigationUI="False" Source="Index.xaml"

                  Navigating="NavigationWindow_Navigating" ResizeMode="NoResize">

</NavigationWindow>

using System;

using System.Threading;

using System.Windows;

using System.Windows.Media.Animation;

using System.Windows.Navigation;

using System.Windows.Threading;

namespace WpfApplication1

{

    /// <summary>

    /// Window1.xaml 的交互逻辑

    /// </summary>

    public partial class Window1 : NavigationWindow

    {

        public Window1()

        {

            InitializeComponent();

        }

        private void NavigationWindow_Navigating(object sender, NavigatingCancelEventArgs e)

        {

            if (Content != null && !_allowDirectNavigation)

            {

                e.Cancel = true;

                _navArgs = e;

                this.IsHitTestVisible = false;

                DoubleAnimation da = new DoubleAnimation(0.3d, new Duration(TimeSpan.FromMilliseconds(300)));

                da.Completed += FadeOutCompleted;

                this.BeginAnimation(OpacityProperty, da);

            }

            _allowDirectNavigation = false;

        }

        private void FadeOutCompleted(object sender, EventArgs e)

        {

            (sender as AnimationClock).Completed -= FadeOutCompleted;

            this.IsHitTestVisible = true;

            _allowDirectNavigation = true;

            switch (_navArgs.NavigationMode)

            {

                case NavigationMode.New:

                    if (_navArgs.Uri == null)

                    {

                        NavigationService.Navigate(_navArgs.Content);

                    }

                    else

                    {

                        NavigationService.Navigate(_navArgs.Uri);

                    }

                    break;

                case NavigationMode.Back:

                    NavigationService.GoBack();

                    break;

                case NavigationMode.Forward:

                    NavigationService.GoForward();

                    break;

                case NavigationMode.Refresh:

                    NavigationService.Refresh();

                    break;

            }

            Dispatcher.BeginInvoke(DispatcherPriority.Loaded,

                (ThreadStart)delegate()

            {

                DoubleAnimation da = new DoubleAnimation(1.0d, new Duration(TimeSpan.FromMilliseconds(200)));

                this.BeginAnimation(OpacityProperty, da);

            });

        }

        private bool _allowDirectNavigation = false;

        private NavigatingCancelEventArgs _navArgs = null;

    }

}

【WPF】淡入淡出切换页面的相关教程结束。