Question

I have “Service” custom control that doesn’t need to be visual. I just add it to my view so it can bind to VM and perform some functionality.

Style looks like so:

<Style TargetType="controls:IdattInteractions">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="controls:IdattInteractions">
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

When view initialized I don’t get OnApplyTemplate called on my control. Is that because ControlTemplate empty? How do I achieve functionality I need? I need to proble visual tree around this control for some functionality and I wanted to do it inside OnApplyTemplate.

How should I go about this?

Answer 1

As far as I know, if your “control” is not visual, then it should be a business logic object of some class, running in memory and interacting with the ViewModel if needed. No need to declare it in XAML.