Interactivity in Framework 4

Question

Hi,
I have problem with the following code when change the targeting framework from 4.5 to 4. The code is as below
<TextBox Grid.Row="2" Grid.Column="3" Text="{Binding CurrentPanditSearch.ProductLotF, TargetNullValue={x:Static sys:String.Empty}, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" CharacterCasing="Upper">
<i:Interaction.Triggers>
<i:EventTrigger EventName="LostFocus">
<i:InvokeCommandAction Command="{Binding HinLotFormatCommandF}" CommandParameter="{Binding Source=F}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBox>
I got  the following error message.
Error 25
The tag 'Interaction.Triggers' does not exist in XML namespace 'http://schemas.microsoft.com/expression/2010/interactivity'.
How can I do the same trigger mechanism in Framewrok4 ? Looking for a solution.
Thanks in advance

Answer 1

I think it moved between .net4 and 4.5
Used to be in System.Windows.Interactivity.dll from Blend SDK for .NET 4.
Which this seems to confirm:
https://msdn.microsoft.com/en-us/library/system.windows.interactivity.interaction%28v=expression.40%29.aspx
Make sure you have that dll referenced.
Hope that helps.
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