如何在WPF中通过触发器关闭窗口

我正在试图制作一个通知弹出窗口，以显示某些事件。每件事情都进展顺利，但问题是我无法关闭该通知弹出窗口，因为它仍然保留在任务栏中，但在显示几秒钟后隐藏。任何帮助将不胜感激。如何在WPF中通过触发器关闭窗口

XAML文件如下：

<Window 
    x:Class="SQLExample.NotificationWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="Notification Popup" Width="300" SizeToContent="Height" 
    WindowStyle="None" AllowsTransparency="True" Background="Transparent"> 

    <Grid RenderTransformOrigin="0,1" x:Name="NotificationWindowsss"> 

     <!-- Notification area --> 
     <Border BorderThickness="1" Background="White" BorderBrush="Black" CornerRadius="0"> 
      <Grid> 
       <Grid.RowDefinitions> 
        <RowDefinition Height="1*"/> 
        <RowDefinition Height="4*"/> 
        <RowDefinition Height="7"/> 
       </Grid.RowDefinitions> 
       <Grid Grid.Row="0"> 
        <Border CornerRadius="0,0,0,0" Background="SkyBlue"> 
         <Grid> 
          <Button HorizontalAlignment="Right" Margin="5,5,5,5" Click="Button_Click" Grid.Row="0" Height="15" Width="15" Foreground="White"> 
           <Button.Template> 
            <ControlTemplate> 
             <Grid> 
              <Ellipse> 
               <Ellipse.Fill> 
                <ImageBrush ImageSource="Images\Close-icon.png"/> 
               </Ellipse.Fill> 
              </Ellipse> 
              <ContentPresenter Content="x" HorizontalAlignment="Center" 
                VerticalAlignment="Center"/> 
             </Grid> 
            </ControlTemplate> 
           </Button.Template> 
          </Button> 
          <TextBlock TextWrapping="Wrap" Margin="10" Grid.Row="0" HorizontalAlignment="Left"> 
         <Bold>Notification data</Bold> 
          </TextBlock> 
         </Grid> 
        </Border> 
       </Grid> 
       <StackPanel Margin="10" Grid.Row="1"> 
        <TextBlock TextWrapping="Wrap"> 
      Something just happened and you are being notified of it. 
        </TextBlock> 
       </StackPanel> 
       <Grid Grid.Row="2" Background="SkyBlue"/> 
      </Grid> 
     </Border> 

     <!-- Animation --> 
     <Grid.Triggers> 
      <EventTrigger RoutedEvent="FrameworkElement.Loaded"> 
       <BeginStoryboard> 
        <Storyboard> 
         <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleY)"> 
          <SplineDoubleKeyFrame KeyTime="0:0:0" Value="0"/> 
          <SplineDoubleKeyFrame KeyTime="0:0:0.5" Value="1"/> 
         </DoubleAnimationUsingKeyFrames> 
         <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)"> 
          <SplineDoubleKeyFrame KeyTime="0:0:2" Value="1"/> 
          <SplineDoubleKeyFrame KeyTime="0:0:4" Value="0"/> 
         </DoubleAnimationUsingKeyFrames> 
        </Storyboard> 
       </BeginStoryboard> 
      </EventTrigger> 
      <EventTrigger RoutedEvent="MouseEnter"> 
       <EventTrigger.Actions> 
        <BeginStoryboard> 
         <Storyboard> 
          <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)"> 
           <SplineDoubleKeyFrame KeyTime="0:0:7" Value="0"/> 
           <SplineDoubleKeyFrame KeyTime="0:0:0" Value="1"/> 
          </DoubleAnimationUsingKeyFrames> 
         </Storyboard> 
        </BeginStoryboard> 
       </EventTrigger.Actions> 
      </EventTrigger> 

     </Grid.Triggers> 
     <Grid.RenderTransform> 
      <ScaleTransform ScaleY="1" /> 
     </Grid.RenderTransform> 

    </Grid> 

</Window>

和xaml.cs在这里。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Data; 
using System.Windows.Documents; 
using System.Windows.Input; 
using System.Windows.Media; 
using System.Windows.Media.Imaging; 
using System.Windows.Shapes; 
using System.Windows.Threading; 

namespace SQLExample 
{ 
    public partial class NotificationWindow : Window 
    { 
     public NotificationWindow() 
     { 
      InitializeComponent(); 

      Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new Action(() => 
      { 
       //var workingArea = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea; 
       var workingArea = System.Windows.SystemParameters.WorkArea; 
       var transform = PresentationSource.FromVisual(this).CompositionTarget.TransformFromDevice; 
       var corner = transform.Transform(new Point(workingArea.Right, workingArea.Bottom)); 

       this.Left = corner.X - this.ActualWidth-10; 
       this.Top = corner.Y - this.ActualHeight; 
      })); 
     } 

     private void Button_Click(object sender, RoutedEventArgs e) 
     { 
      this.Close(); 
     } 
    } 
}

事情我想要做的是，当通知弹出窗口消失或技术意义上得到“透明度”等于零，那么就应该关闭自己，我是想通过触发器来做到这一点，但是，解决方案无法得到。引导我如何做到这一点或其他简单的方法来做到这一点。

预先感谢您。

来源

2017-03-08 Awais Tariq

如果你想要一个纯粹的xaml解决方案，[见这里]（http://stackoverflow.com/questions/16573960/how-to-bind-to-windows-close-button-the-x-button）（这不是公认的答案，但工作原理也是如此。） –

非常感谢您的回复，但我认为您告诉我的解决方案与按钮按下相关，我的意思是用户必须按按钮关闭窗口，而且我已经在做我的通知关闭按钮。我想要自动关闭窗口，就像我想到的那样，当窗口的**不透明**变成零**时，窗口通过在不透明度等级零上触发触发器自动关闭。 –

我已经想通了一些在线解决方案后想出了一个计时器可以连接到通知弹出窗口，当通知弹出窗口显示和相关的时间已过的线程将关闭通知弹出并停止本身。

它可以这样工作我猜，但我不知道这个解决方案是够好的。

来源

2017-11-08 06:14:37

如何在WPF中通过触发器关闭窗口

回答

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