Invoke Command When "ENTER" Key Is Pressed In XAML
- by bitxwise
I want to invoke a command when ENTER is pressed in a TextBox. Consider the following XAML:
<UserControl
...
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
...>
...
<TextBox>
<i:Interaction.Triggers>
<i:EventTrigger EventName="KeyUp">
<i:InvokeCommandAction Command="{Binding MyCommand}"
CommandParameter="{Binding Text}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBox>
...
</UserControl>
and that MyCommand is as follows:
public ICommand MyCommand {
get { return new DelegateCommand<string>(MyCommandExecute); }
}
private void MyCommandExecute(string s) { ... }
With the above, my command is invoked for every key press. How can I restrict the command to only invoke when the ENTER key is pressed?
I understand that with Expression Blend I can use Conditions but those seem to be restricted to elements and can't consider event arguments.
I have also come across SLEX which offers its own InvokeCommandAction implementation that is built on top of the Systems.Windows.Interactivity implementation and can do what I need. Another consideration is to write my own trigger, but I'm hoping there's a way to do it without using external toolkits.
