淡出窗口

Question

我目前正在开发一个wpf c＃应用程序。我已经添加到事件触发器到窗体的xaml中，当窗口加载时淡入，当窗体关闭时淡出。

衰落工作完全没有任何问题，但淡出不起作用。

我已经设置好窗口在加载时会淡入，有一个定时器持续5秒，然后调用窗体淡出事件。

但是，窗口不会淡出它只是马上关闭没有动画。下面是我在淡入和淡出的事件

<Window.Triggers> 
     <EventTrigger RoutedEvent="Window.Loaded"> 
      <BeginStoryboard> 
       <Storyboard Name="FormFade"> 
        <DoubleAnimation Name="FormFadeAnimation" 
            Storyboard.TargetProperty="(Window.Opacity)" 
            From="0.0" To="1.0" Duration="0:0:1" 
            AutoReverse="False" RepeatBehavior="1x" /> 
       </Storyboard> 
      </BeginStoryboard> 
     </EventTrigger> 
     <EventTrigger RoutedEvent="Window.Unloaded"> 
      <BeginStoryboard> 
       <Storyboard Name="FormFadeOut" Completed="FormFadeOut_Completed"> 
        <DoubleAnimation Name="FormFadeOutAnimation" 
            Storyboard.TargetName="FormFadeOut" 
            Storyboard.TargetProperty="(Window.Opacity)" 
            From="1.0" To="0.0" Duration="0:0:1" 
            AutoReverse="False" RepeatBehavior="1x" /> 
       </Storyboard> 
      </BeginStoryboard> 
     </EventTrigger> 
    </Window.Triggers> 

感谢您可以提供任何帮助的代码。

Answer 1

Unloaded是不适合这个事件，我不知道这个事件是否可以发生在Windows。您需要处理Closing，防止其实际关闭，开始动画并在动画的Completed事件发生时关闭它。

例如

<Window ... 
     Closing="Window_Closing"> 

private void Window_Closing(object sender, CancelEventArgs e) 
{ 
    Closing -= Window_Closing; 
    e.Cancel = true; 
    var anim = new DoubleAnimation(0, (Duration)TimeSpan.FromSeconds(1)); 
    anim.Completed += (s, _) => this.Close(); 
    this.BeginAnimation(UIElement.OpacityProperty, anim); 
} 

Answer 2

只是尝试这个样本

<Window x:Class="FadeInAndOutWindow.Window1" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
Title="Window1" Height="300" Width="300" Closing="Window_Closing" x:Name="winHelp"> 
<Window.Triggers> 
    <EventTrigger RoutedEvent="Window.Loaded"> 
     <BeginStoryboard> 
      <Storyboard Name="FormFade"> 
       <DoubleAnimation Name="FormFadeAnimation" 
            Storyboard.TargetName="winHelp" 
            Storyboard.TargetProperty="(Window.Opacity)" 
            From="0.0" 
            To="1.0" 
            Duration="0:0:1" 
            AutoReverse="False" 
            RepeatBehavior="1x" /> 
      </Storyboard> 
     </BeginStoryboard> 
    </EventTrigger> 
    <EventTrigger RoutedEvent="Window.Unloaded"> 
     <BeginStoryboard> 
      <Storyboard Name="FormFadeOut" 
         Completed="FormFadeOut_Completed"> 
       <DoubleAnimation Name="FormFadeOutAnimation" 
            Storyboard.TargetName="winHelp" 
            Storyboard.TargetProperty="(Window.Opacity)" 
            From="1.0" 
            To="0.0" 
            Duration="0:0:1" 
            AutoReverse="False" 
            RepeatBehavior="1x" /> 
      </Storyboard> 
     </BeginStoryboard> 
    </EventTrigger> 
</Window.Triggers>  
<Grid> 

</Grid> 

namespace FadeInAndOutWindow 
{ 
    public partial class Window1 : Window 
    { 
     public Window1() 
     { 
      InitializeComponent(); 
     } 

     private bool closeCompleted = false; 


     private void FormFadeOut_Completed(object sender, EventArgs e) 
     { 
      closeCompleted = true; 
      this.Close(); 
     } 

     private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e) 
     { 

      if (!closeCompleted) 
      { 
       FormFadeOut.Begin(); 
       e.Cancel = true; 
      } 
     } 

    } 
} 

Answer 3

H.B.解决方案是好的，但不要有效地关闭窗口，因为Close（）调用window_Closing和循环。在这里我的工作液：淡出关闭时WPF窗口]的

private void Window_Loaded(object sender, RoutedEventArgs e) 
    { 
     AlreadyFaded = false; 
    } 

    bool AlreadyFaded; 
    private void window_Closing(object sender, CancelEventArgs e) 
    { 
     if (!AlreadyFaded) 
     { 
      AlreadyFaded = true; 
      e.Cancel = true; 
      var anim = new DoubleAnimation(0, (Duration)TimeSpan.FromSeconds(1)); 
      anim.Completed += new EventHandler(anim_Completed); 
      this.BeginAnimation(UIElement.OpacityProperty, anim); 
     } 
    } 

    void anim_Completed(object sender, EventArgs e) 
    { 
     Close(); 
    }