WPF calling commands via events

Question

Is it possible to call a command via an event in WPF?

I have a save button that when pressed calls a command, this is pressed when you have finished editing a textbox, it also passes an object as a command parameter

 <Button Content="Save"  Command="{Binding DataContext.SaveQueueTimeCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ItemsControl}}}" CommandParameter="{Binding}" />

What I would ideally like to do is call this command and pass the object as a parameter when the textbox loses focus, rather than having to press the button, something like:

 <Button LostFocus="{Binding SaveQueueTimeCommand}" />

And still somehow pass the object as a parameter. Is there a way to acheive this without using code behind as I am using the MVVM pattern

Thanks for your time

question from:https://stackoverflow.com/questions/1048517/wpf-calling-commands-via-events

Answer 1

The simplest way to do this is using an interaction trigger.

<Grid xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="SomeEvent">
            <i:InvokeCommandAction Command="{Binding Path=SomeCommand, Mode=OneWay}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>
</Grid>

I have added this for posterity sake.