blocks|key|2007157|text|选项1|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2007158|使用Button.IsCancel属性。|2007159|<Button+Name="btnCancel"+IsCancel="true"+Click="OnClickCancel">Cancel</Button>|code-block|syntax|javascript|2007160|当您将按钮的IsCancel属性设置为true时，将创建一个在AccessKeyManager中注册的按钮。然后，当用户按ESC键时，该按钮被激活。|blockquote|2007161|但是，这只适用于对话框。|2007162|Option2|2007163|如果要关闭Esc按下的窗口，可以向窗口上的PreviewKeyDown添加处理程序。|2007164|public+MainWindow()
{
++++InitializeComponent();

++++this.PreviewKeyDown+%2B=+new+KeyEventHandler(HandleEsc);
}

private+void+HandleEsc(object+sender,+KeyEventArgs+e)
{
++++if+(e.Key+==+Key.Escape)
++++++++Close();
}|2007165|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.controls.button.iscancel.aspx^0|0|3|0|2|F|0|0|0|0|0|0|7|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|18|8|@]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|H|3|I|5|J|7|1C|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|O|7|1D|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1E|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|1F|8|@$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|T|3|U|5|6|7|1I|8|@]|D|@]|E|$]]|$1|V|3|W|5|J|7|1J|8|@]|D|@]|E|$K|L]]|$1|X|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|Y|$Z|$5|10|11|12|E|$13|14]]]]

Option 1

Use <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.button.iscancel.aspx" rel="noreferrer">Button.IsCancel</a> property.

<pre><code>&lt;Button Name="btnCancel" IsCancel="true" Click="OnClickCancel"&gt;Cancel&lt;/Button&gt;
</code></pre>

<blockquote>
 When you set the IsCancel property of a button to true, you create a
 Button that is registered with the AccessKeyManager. The button is
 then activated when a user presses the ESC key.
</blockquote>

However, this works properly only for Dialogs.

Option2 

You add a handler to PreviewKeyDown on the window if you want to close windows on Esc press. 

<pre><code>public MainWindow()
{
 InitializeComponent();

 this.PreviewKeyDown += new KeyEventHandler(HandleEsc);
}

private void HandleEsc(object sender, KeyEventArgs e)
{
 if (e.Key == Key.Escape)
 Close();
}
</code></pre>

blocks|key|183200|text|在InitializeComponent()后面放一行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|183201|+PreviewKeyDown+%2B=+(s,e)+=>+{+if+(e.Key+==+Key.Escape)+Close()+;};|code-block|syntax|javascript|183202|请注意，这种代码不会破坏MVVM模式，因为这与UI相关，并且您不访问任何视图模型数据。另一种方法是使用附加属性，这将需要更多的代码。|183203|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

One line to put after InitializeComponent():

<pre><code> PreviewKeyDown += (s,e) =&gt; { if (e.Key == Key.Escape) Close() ;};
</code></pre>

Please note that this kind of code behind does not break MVVM pattern since this is UI related and you don't access any viewmodel data. The alternative is to use attached properties which will require more code.

blocks|key|2007191|text|这里是一个没有按钮的解决方案，是干净的，更多的MVVM。在对话框/窗口中添加以下XAML：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2007192|<Window.InputBindings>
++<KeyBinding+Command="ApplicationCommands.Close"+Key="Esc"+/>
</Window.InputBindings>

<Window.CommandBindings>
++<CommandBinding+Command="ApplicationCommands.Close"+Executed="CloseCommandBinding_Executed"+/>
</Window.CommandBindings>|code-block|syntax|javascript|2007193|并在代码隐藏中处理事件：|2007194|private+void+CloseCommandBinding_Executed(object+sender,+System.Windows.Input.ExecutedRoutedEventArgs+e)
{
++if+(MessageBox.Show("Close?",+"Close",+MessageBoxButton.YesNo,+MessageBoxImage.Question)+==+MessageBoxResult.Yes)
++++this.Close();
}|2007195|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Here is a button-less solution that is clean and more MVVM-ish. Add the following XAML into your dialog/window:
<pre><code>&lt;Window.InputBindings&gt;
 &lt;KeyBinding Command=&quot;ApplicationCommands.Close&quot; Key=&quot;Esc&quot; /&gt;
&lt;/Window.InputBindings&gt;

&lt;Window.CommandBindings&gt;
 &lt;CommandBinding Command=&quot;ApplicationCommands.Close&quot; Executed=&quot;CloseCommandBinding_Executed&quot; /&gt;
&lt;/Window.CommandBindings&gt;
</code></pre>
and handle the event in the code-behind:
<pre><code>private void CloseCommandBinding_Executed(object sender, System.Windows.Input.ExecutedRoutedEventArgs e)
{
 if (MessageBox.Show(&quot;Close?&quot;, &quot;Close&quot;, MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes)
 this.Close();
}
</code></pre>

blocks|key|2007226|text|您可以创建一个自定义DependencyProperty。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2007227|using+System.Windows;
using+System.Windows.Input;

public+static+class+WindowUtilities
{
++++///+<summary>
++++///+Property+to+allow+closing+window+on+Esc+key.
++++///+</summary>
++++public+static+readonly+DependencyProperty+CloseOnEscapeProperty+=+DependencyProperty.RegisterAttached(
+++++++"CloseOnEscape",
+++++++typeof(bool),
+++++++typeof(WindowUtilities),
+++++++new+FrameworkPropertyMetadata(false,+CloseOnEscapeChanged));

++++public+static+bool+GetCloseOnEscape(DependencyObject+d)
++++{
++++++++return+(bool)d.GetValue(CloseOnEscapeProperty);
++++}

++++public+static+void+SetCloseOnEscape(DependencyObject+d,+bool+value)
++++{
++++++++d.SetValue(CloseOnEscapeProperty,+value);
++++}

++++private+static+void+CloseOnEscapeChanged(DependencyObject+d,+DependencyPropertyChangedEventArgs+e)
++++{
++++++++if+(d+is+Window+target)
++++++++{
++++++++++++if+((bool)e.NewValue)
++++++++++++{
++++++++++++++++target.PreviewKeyDown+%2B=+Window_PreviewKeyDown;
++++++++++++}
++++++++++++else
++++++++++++{
++++++++++++++++target.PreviewKeyDown+-=+Window_PreviewKeyDown;
++++++++++++}
++++++++}
++++}

++++private+static+void+Window_PreviewKeyDown(object+sender,+KeyEventArgs+e)
++++{
++++++++if+(sender+is+Window+target)
++++++++{
++++++++++++if+(e.Key+==+Key.Escape)
++++++++++++{
++++++++++++++++target.Close();
++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|2007228|然后像这样使用您的窗口的XAML：|2007229|<Window+...
++++xmlns:custom="clr-namespace:WhereverThePropertyIsDefined"
++++custom:WindowUtilities.CloseOnEscape="True"
++++...>|2007230|答案基于这个答案中引用的gist的内容。|2007231|entityMap|0|LINK|mutability|MUTABLE|url|https://learn.microsoft.com/en-us/dotnet/api/system.windows.dependencyproperty|1|https://stackoverflow.com/a/32373127/1552016^0|A|I|0|0|0|0|0|4|4|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

You can create a custom <a href="https://learn.microsoft.com/en-us/dotnet/api/system.windows.dependencyproperty" rel="nofollow noreferrer">DependencyProperty</a>:
<pre><code>using System.Windows;
using System.Windows.Input;

public static class WindowUtilities
{
 /// &lt;summary&gt;
 /// Property to allow closing window on Esc key.
 /// &lt;/summary&gt;
 public static readonly DependencyProperty CloseOnEscapeProperty = DependencyProperty.RegisterAttached(
 &quot;CloseOnEscape&quot;,
 typeof(bool),
 typeof(WindowUtilities),
 new FrameworkPropertyMetadata(false, CloseOnEscapeChanged));

 public static bool GetCloseOnEscape(DependencyObject d)
 {
 return (bool)d.GetValue(CloseOnEscapeProperty);
 }

 public static void SetCloseOnEscape(DependencyObject d, bool value)
 {
 d.SetValue(CloseOnEscapeProperty, value);
 }

 private static void CloseOnEscapeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
 {
 if (d is Window target)
 {
 if ((bool)e.NewValue)
 {
 target.PreviewKeyDown += Window_PreviewKeyDown;
 }
 else
 {
 target.PreviewKeyDown -= Window_PreviewKeyDown;
 }
 }
 }

 private static void Window_PreviewKeyDown(object sender, KeyEventArgs e)
 {
 if (sender is Window target)
 {
 if (e.Key == Key.Escape)
 {
 target.Close();
 }
 }
 }
}
</code></pre>
And use it your windows' XAML like this:
<pre><code>&lt;Window ...
 xmlns:custom=&quot;clr-namespace:WhereverThePropertyIsDefined&quot;
 custom:WindowUtilities.CloseOnEscape=&quot;True&quot;
 ...&gt;
</code></pre>
The answer is based on the content of the gist referenced in <a href="https://stackoverflow.com/a/32373127/1552016">this answer</a>.

<blockquote>
 Possible Duplicate: 
 <a href="https://stackoverflow.com/questions/3863431/how-can-i-assign-the-close-on-escape-key-press-behavior-to-all-wpf-windows-with">How can I assign the &#39;Close on Escape-key press&#39; behavior to all WPF windows within a project?</a> 
</blockquote>



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.

How to Close a Window in WPF on a escape key

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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可能重复：当用户单击“转义”按钮时，我希望关闭wpf项目中的窗口。我不想在每个窗口中编写代码，而是希望创建一个类，当用户按转义键时，这个类可以捕获。

问如何在转义键上关闭WPF中的窗口
EN

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问如何在转义键上关闭WPF中的窗口EN