Silverlight DataStateBehavior, initial value not used

Posted by JimmySavile on Stack Overflow See other posts from Stack Overflow or by JimmySavile
Published on 2010-01-21T20:45:05Z Indexed on 2010/04/07 2:03 UTC
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Hi,

I am trying to use the Silverlight DataStateBehavior, it works fine in most cases where I click a button which sets say a 'Selected' Property in the view model to either false or true. The DataStateBehavior then tells the VisualStateManager to go to the relevant state.

Like this:

   <Button...>
   <i:Interaction.Behaviors>
             <id:DataStateBehavior Binding="{Binding Selected}" Value="True" TrueState="SelectedVisualState" FalseState="DeselectedVisualState"/>
          </i:Interaction.Behaviors>
   </Button>

The above works fine. What I am trying to do though is to get it to set the correct state when the application loads, if I were to set the 'Selected' property on the view model to true by default I wouldn't see any changes in the UI until I clicked the button to change the viewmodel property.

I know there are several classes involved with the DataState stuff including:

  • BindingListener.cs
  • ConverterHelper.cs
  • DataStateBehavior.cs
  • DataStateSwitchBehavior.cs
  • DataTrigger.cs

Any clues would be good, Thanks

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