WPF Button use different icon for enabled and disabled state - wpf

Question

How can I give my button different icons depending on the Enabled state. Not very familiar with Style setters yet.
XAML button:
<Button
x:Name="DownloadNewestEpisodes"
Width="90"
Margin="5,5"
ToolTip="Download newest episodes"
ToolTipService.ShowOnDisabled="True"
Command="w:MainWindow.DownloadNewestEpisodesCommand"
CommandParameter="{Binding ElementName=TvShowsTreeView, Path=SelectedItem}">
<StackPanel>
<Image Source="../icons/import.png" />
</StackPanel>
</Button>
How can I switch between
<Image Source="../icons/import.png" />
and
<Image Source="../icons/import_disabled.png" />
based on the enabled state of the button?
A little help would be great!

Answer 1

You can use DataTrigger:
<Button...
>
<StackPanel>
<Image>
<Image.Style>
<Style TargetType="Image">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsEnabled, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Button}}" Value="True">
<Setter Property="Source" Value="..." />
</DataTrigger>
<DataTrigger Binding="{Binding Path=IsEnabled, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Button}}" Value="False">
<Setter Property="Source" Value="..." />
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</StackPanel>
</Button>

Answer 2

Set default image in setter and use DataTrigger to switch to other value (in case IsEnabled set to False):
<Button>
<Image>
<Image.Style>
<Style TargetType="Image">
<Setter Property="Source" Value="Images/a.png"/>
<Style.Triggers>
<DataTrigger Binding="{Binding IsEnabled,
RelativeSource={RelativeSource Mode=FindAncestor,
AncestorType=Button}}"
Value="False">
<Setter Property="Source" Value="Images/c.png"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</Button>