Bind Events to UserControl in WPF

Question

How can i propagate the PreviewKeyDown event out from the myUserControl which is inside a myWindow.

in myWindow.xaml

<local:MyFilter x:Name="check" MyEvent="submit" />

in myUserContorl.xaml

 <ComboBox x:Name="combo" PreviewKeyDown="{Binding Path=MyEvent}" />

in myUserContorl.xaml.cs

#region MyEvent /// <summary> /// Gets or sets the Label which is displayed next to the field /// </summary> public EventHandler MyEvent { get { return (EventHandler)GetValue(EventHandlerProperty); } set { SetValue(EventHandlerProperty, value); } } /// <summary> /// Identified the Label dependency property /// </summary> public static readonly DependencyProperty EventHandlerProperty = DependencyProperty.Register("MyEvent", typeof(EventHandler), typeof(myUserControl), new PropertyMetadata("")); #endregion

This works for just 'string fields' like content or text... but doesn't work for events

Clemens · Accepted Answer · 2017-08-31 18:27:57Z

1

Just add (and remove) event handlers to the underlying control:

public event KeyEventHandler MyEvent { add { combo.AddHandler(PreviewKeyDownEvent, value); } remove { combo.RemoveHandler(PreviewKeyDownEvent, value); } }

without any Binding in XAML:

<ComboBox x:Name="combo" />

edited Aug 31, 2017 at 18:27

answered Aug 31, 2017 at 18:13

Clemens

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2 Comments

user652644 Over a year ago

Thanx. But, How can i pass MyEvent from myWindow <local:myWindow x:Name="check" MyEvent="submit" /> private void submit(object sender, KeyEventArgs e) { .... }

Clemens Over a year ago

As you already have it, but change RoutedEventHandler to KeyEventHandler.

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