DataTrigger.EnterActions

Question

I'm having problems getting DataTriggers.EnterActions to work.  Given the following snipet:

<DataTemplate.Triggers>

<Trigger Property="IsMouseOver" Value="True">

<Trigger.EnterActions>

<BeginStoryboard>

<Storyboard>

<DoubleAnimation Storyboard.TargetName="itemBackground" Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:0.2" />

</Storyboard>

</BeginStoryboard>

</Trigger.EnterActions>

<Trigger.ExitActions>

<BeginStoryboard>

<Storyboard>

<DoubleAnimation Storyboard.TargetName="itemBackground" Storyboard.TargetProperty="Opacity"

To="0" Duration="0:0:0.2" />

</Storyboard>

</BeginStoryboard>

</Trigger.ExitActions>

</Trigger>

<DataTrigger Binding="{Binding ShowAlert}" Value="True">

<DataTrigger.EnterActions>

<BeginStoryboard>

<Storyboard >

<DoubleAnimation Storyboard.TargetName="itemBackground" Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:5" />

</Storyboard>

</BeginStoryboard>

</DataTrigger.EnterActions>

<DataTrigger.ExitActions>

<BeginStoryboard>

<Storyboard>

<DoubleAnimation Storyboard.TargetName="itemBackground" Storyboard.TargetProperty="Opacity" To="0" Duration="0:0:1" />

</Storyboard>

</BeginStoryboard>

</DataTrigger.ExitActions>

</DataTrigger>

</DataTemplate.Triggers>

</DataTemplate>

The Trigger.EnterActions fires and works fine.  However the DataTrigger.EnterActions, which performs the same animation does not fire.  I placed a breakpoint on the property that the DataTrigger.EnterActions is bound to, and the property is being accessed.  Anyone have experience with DataTrigger.EnterActions?  Thanks. 

Answer 1

On what object does ShowAlert exist? Does the object support INotifyPropertyChanged?

Answer 2

Does the data item you are triggering against implement INotifyPropertyChanged?