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I'm trying to figure out how this would be possible to accomplish;

I have a button, if the ImageSource property of a viewmodel is not null I would like to add an image to this button. if ImageSource is equal to null I would bind the content of the button to "DisplayName" property of the same viewmodel.

Would this be possible ?

I think it could be done with a setter trigger.

Make a trigger on IsImageSourceNull and create that property in the ViewModel. If true set button content to DisplayName if false set it to the image.
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Frode Jensen 16-Sep-10 4:51am    
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Automatic vote of 5 for accepting answer.

I dont know whether your design is suited the below impementation.Try the following.

create a data template as follows
<DataTemplate x:Key="MyButtonContentTemplate" DataType="{x:Type local:YourViewModelObject}">
               <TextBlock x:Name="txt" Text="{Binding display_name}"/>
               <Image x:Name="img" Source="{Binding image_source}"/>
               <DataTrigger Binding="{Binding image_source}" Value="{x:Null}">
                   <Setter Property="Visibility" Value="Collapsed" TargetName="img"/>
               <DataTrigger Binding="{Binding display_name}" Value="{x:Null}">
                   <Setter Property="Visibility" Value="Collapsed" TargetName="txt"/>

then set the content as your view model object and apply the content template as the above template.

<Button ContentTemplate="{StaticResource MyButtonContentTemplate}" x:Name="btn" Width="100" Height="50"/>

btn.Content = YourViewModelObject;
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