WPF 页面切换效果

原文:WPF 页面切换效果

最近做一个有页面切换的吧..

我觉得这个功能是比较基础的吧..

在网上百度了一下..

用NavigationWindow的比较好..

因为Demo中是带了淡入淡出的页面效果的..

我就想研究一下这个效果是怎么实现的..

发现找不到..

  public partial class MainWindow : NavigationWindow
     {
         public MainWindow()
         {
             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(100)));
                 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;
     }