如何关闭在WPF一个窗口上退出键 [英] How to Close a Window in WPF on a escape key

问题描述

可能重复：结果
的如何分配项目中的关于取消 - 按键关闭的行为给所有WPF窗口？

我要关闭的窗户，我的WPF项目，当用户点击逃生按钮。我不想把代码写在每一个窗口，但要创建一个类可以赶上当用户按退出键。

解决方案

  ///<总结> 
 ///附加的行为，保持在屏幕上
 ///<窗口; /总结> 
公共静态类WindowService 
 {
 ///<总结> 
 /// KeepOnScreen附加依赖项属性
 ///< /总结> 
公共静态只读的DependencyProperty EscapeClosesWindowProperty = DependencyProperty.RegisterAttached（
EscapeClosesWindow，
 typeof运算（布尔），
 typeof运算（WindowService），
新FrameworkPropertyMetadata（假的，新的PropertyChangedCallback（OnEscapeClosesWindowChanged）））; 
 
 ///<总结> 
 ///获取EscapeClosesWindow财产。这依赖属性
 ///表示转义键是否关闭窗口。 
 ///< /总结> 
 ///< PARAM NAME =D><见CREF =DependencyObject的/>获得来自以下的财产; /参数> 
 ///<返回>在EscapeClosesWindow财产1所述的价值; /回报> 
公共静态布尔GetEscapeClosesWindow（DependencyObject的D）
 {
返回（布尔）d.GetValue（EscapeClosesWindowProperty）; 
} 
 
 ///<总结> 
 ///设置EscapeClosesWindow财产。这依赖属性
 ///表示转义键是否关闭窗口。 
 ///< /总结> 
 ///< PARAM NAME =D><见CREF =DependencyObject的/>设置针对<财产; /参数> 
 ///< PARAM NAME =值>在财产和LT的值/参数> 
公共静态无效SetEscapeClosesWindow（DependencyObject的D，布尔值）
 {
 d.SetValue（EscapeClosesWindowProperty，值）; 
} 
 
 ///<总结> 
 ///把手变为EscapeClosesWindow属性。 
 ///< /总结> 
 ///< PARAM NAME =D><见CREF =DependencyObject的/>引发该事件< /参数> 
 ///< PARAM NAME =E>将<见CREF =DependencyPropertyChangedEventArgs/>包含事件数据< /参数> 
私有静态无效OnEscapeClosesWindowChanged（DependencyObject的D，DependencyPropertyChangedEventArgs E）
 {
窗口的目标=（窗口）D; 
如果（目标！= NULL）
 {
 target.PreviewKeyDown + =新System.Windows.Input.KeyEventHandler（Window_PreviewKeyDown）; 
} 
} 
 
 ///<总结> 
 ///处理窗口
 ///< PreviewKeyDown事件; /总结> 
 ///< PARAM NAME =发件人>该事件的源< /参数> 
 ///< PARAM NAME =E>将<见CREF =KeyEventArgs/>包含事件数据< /参数> 
私有静态无效Window_PreviewKeyDown（对象发件人，发送KeyEventArgs E）
 {
窗口的目标=（窗口）发送; 
 
 //如果是退出键，关闭窗口
如果（e.Key == Key.Escape）
 target.Close（）; 
} 
} 
  

然后在XAML
的xmlns：LOC = CLR的命名空间：JIMS.Commands>

Possible Duplicate:
How can I assign the 'Close on Escape-key press' behavior to all WPF windows within a project?

I want to close the windows in my wpf project when the user clicks the escape button. I don't want to write the code in every window but want to create a class which can catch the when the user press the escape key.

解决方案

/// <summary>
/// Attached behavior that keeps the window on the screen
/// </summary>
public static class WindowService
{
   /// <summary>
   /// KeepOnScreen Attached Dependency Property
   /// </summary>
   public static readonly DependencyProperty EscapeClosesWindowProperty = DependencyProperty.RegisterAttached(
      "EscapeClosesWindow",
      typeof(bool),
      typeof(WindowService),
      new FrameworkPropertyMetadata(false, new PropertyChangedCallback(OnEscapeClosesWindowChanged)));

   /// <summary>
   /// Gets the EscapeClosesWindow property.  This dependency property 
   /// indicates whether or not the escape key closes the window.
   /// </summary>
   /// <param name="d"><see cref="DependencyObject"/> to get the property from</param>
   /// <returns>The value of the EscapeClosesWindow property</returns>
   public static bool GetEscapeClosesWindow(DependencyObject d)
   {
      return (bool)d.GetValue(EscapeClosesWindowProperty);
   }

   /// <summary>
   /// Sets the EscapeClosesWindow property.  This dependency property 
   /// indicates whether or not the escape key closes the window.
   /// </summary>
   /// <param name="d"><see cref="DependencyObject"/> to set the property on</param>
   /// <param name="value">value of the property</param>
   public static void SetEscapeClosesWindow(DependencyObject d, bool value)
   {
      d.SetValue(EscapeClosesWindowProperty, value);
   }

   /// <summary>
   /// Handles changes to the EscapeClosesWindow property.
   /// </summary>
   /// <param name="d"><see cref="DependencyObject"/> that fired the event</param>
   /// <param name="e">A <see cref="DependencyPropertyChangedEventArgs"/> that contains the event data.</param>
   private static void OnEscapeClosesWindowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   {
      Window target = (Window)d;
      if (target != null)
      {
         target.PreviewKeyDown += new System.Windows.Input.KeyEventHandler(Window_PreviewKeyDown);
      }
   }

   /// <summary>
   /// Handle the PreviewKeyDown event on the window
   /// </summary>
   /// <param name="sender">The source of the event.</param>
   /// <param name="e">A <see cref="KeyEventArgs"/> that contains the event data.</param>
   private static void Window_PreviewKeyDown(object sender, KeyEventArgs e)
   {
      Window target = (Window)sender;

      // If this is the escape key, close the window
      if (e.Key == Key.Escape)
         target.Close();
   }
}

Then in XAML xmlns:loc="clr-namespace:JIMS.Commands">

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