WPF calling commands via events

command, events, wpf

Solution

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

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

Problem

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

Original source