Button using ICommand does not get disabled?

Question

I have a button control in my wpf-mvvm application.

I use an ICommand property (defined in viewmodel) to bind the button click event to viewmodel.

I have -> execute and canexecute parameters for my ICommand implementation (RelayCommand).

Even if CanExecute is false...button is not disabled...WHEN button CONTENT is IMAGE

But, when button content is text..enable/disable works fine.

<Button DockPanel.Dock="Top" 
                        Command="{Binding Path=MoveUpCommand}">
                    <Button.Content>
                        <Image Source="/Resources/MoveUpArrow.png"></Image>
                    </Button.Content>
                    <Style>
                        <Style.Triggers>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Property="Opacity" Value=".5" />
                            </Trigger>
                        </Style.Triggers>
                    </Style>
                </Button>

Answer 1

Button does get disabled, its just that it doesn't affect rendering of the image. You will have to write a trigger in the style which changes the opacity of the image to .5 and you'll get the desired effect of button disabled like so:

<Style x:Key="imageButton" TargetType="Button">
        <Style.Triggers>
            <Trigger Property="IsEnabled" Value="False">
                <Setter Property="Opacity" Value=".5" />
            </Trigger>
        </Style.Triggers>
</Style>