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Editorial Team
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Asked: 2026-06-05T00:34:48+00:00

I am required to use the mvvm pattern. I know that the viewmodel should

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I am required to use the mvvm pattern. I know that the viewmodel should not care about the view from what I been reading. As a result I don’t know how to solve this problem:

I have a dll that basically turns a textbox and listview into an autocomplete control:

SomeDll.InitAutocomplete<string>(TextBox1, ListView1, SomeObservableCollection);

anyways I don’t know how to call that method from the viewmodel using the mvvm patter. if I reference the controls in the view I will be braking the rules.

I am new to MVVM pattern and my company requires me to follow it. what will be the most appropriate way of solving this problem?

I know I will be able to solve it by passing the entire view to the viewmodel as a constructor parameter but that will totaly break the mvvm pattern just because I need to reference two controls in the view.

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  1. Editorial Team

    What you’re doing here is a pure view concern, so I’d recommend doing it in the view (i.e. the code-behind). The view knows about the VM and its observable collection, so why not let the code behind make this call?

    (I’d also recommend seeing if you can get a non-code/XAML API for “SomeDll”, but I have no idea how much control you might have over that)

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