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POAttach command with parameter to KeyUp event
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Id
3238448
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AcceptedAnswerId
3241526
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2
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CreationDate
2010-07-13T14:57:57.153
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LastActivityDate
2010-07-13T21:06:57.703
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text
Body
I am currently transforming a medium size WPF project to MVVM and I ran into a problem that I wasn't able to solve, yet. Maybe you could help me out? The target framework is .NET 3.5.1. I have a list view that gets its items from the underlying view model. That view model is exposing a command to remove the selected items from the list view. Therefore the command parameter is bound to the SelectedItems property of the list view. <pre><code><ListView ItemsSource="{Binding MyItems}" x:Name="MyListView" SelectionMode="Extended"> </ListView> <Button x:Name="MyRemoveButton" Content="Remove item" Command="{Binding RemoveItemCommand}" CommandParameter="{Binding ElementName=MyListView, Path=SelectedItems}"> </code></pre> My intention is to execute this command not only when pressing a button, but also when the KeyUp event is fired on the list view and the pressed key is "delete". I was close to finding the solution when I stumbled upon interaction triggers in this example: <a href="http://joyfulwpf.blogspot.com/2009/05/mvvm-invoking-command-on-attached-event.html?showComment=1250325648481#c3867495357686026904" rel="nofollow noreferrer">http://joyfulwpf.blogspot.com/2009/05/mvvm-invoking-command-on-attached-event.html?showComment=1250325648481#c3867495357686026904</a> Now the problem with this demo is that the command parameter is the pressed key, but in my case I need the command parameter to be the SelectedItems property and I need the command to execute only on a specific key. Is there any way to do this without much overhead and in the MVVM way? Something like this would be awesome: <pre><code><i:Interaction.Triggers> <i:EventTrigger EventName="KeyUp"> <local:CommandAction Command="{Binding RemoveItemCommand}" CommandParameter={Binding ElementName=MyListView, Path=SelectedItems} EventArgument="Key.Delete"/> </i:EventTrigger> </i:Interaction.Triggers> </code></pre>
Tags
<c#><wpf><events><mvvm><command>
Title
Attach command with parameter to KeyUp event
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