WPF: Zoom In An Image On Application Load

WPFZoomImageOnLoad1.xml

<!-- Assume a data context with all the appropriate bindings -->
<Window 
    <Window.InputBindings>
        <KeyBinding Key="Up" Command="{Binding ZoomIn}" />
        <KeyBinding Key="Down" Command="{Binding ZoomOut}" />
    </Window.InputBindings>
    <Grid>
        <Image Source="{Binding MyPath}" HorizontalAlignment="Center" 
        VerticalAlignment="Center" Width="{Binding DisplayedWidth}" >
            <Image.Triggers>
                <EventTrigger RoutedEvent="Image.Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Storyboard.TargetProperty="Width" From="0" 
                            To="{Binding DisplayedWidth}" Duration="0:0:0.5" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Image.Triggers>
        </Image>
    </Grid>
</Window>

WPFZoomImageOnLoad2.xml

<Storyboard>
    <DoubleAnimation Storyboard.TargetProperty="Width" From="0" FillBehavior="Stop"
    To="{Binding DisplayedWidth}" Duration="0:0:0.5" />
</Storyboard>