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Editorial Team
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Asked: 2026-05-16T10:20:48+00:00

I am creating a custom control in WPF, it is the highly unoriginal example

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I am creating a custom control in WPF, it is the highly unoriginal example of a stock ticker that I am deriving from the Control type. My question is: Are there any recommnded design patterns for controls themselves (as opposed to the app)? I am using MVVM for the application as a whole but just wandered if it is good or bad practice to use such a design pattern with the control itself.

My reasons for thinking of using MVVM for the control is that:

  • It is a relatively complex control, in that it has a graphing ability and Dependency Properties of Midprice, Average etc etc
  • To have a ViewMOdel as part of it would make unit testing it easier (or even possible)
  • Makes the entire coding process easier, especially as I have a bespoke ObservableCollection of point types.

Any thought on the matter would be brilliant. I just don’t know if this is good practice or not.

Many thanks

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1 Answer

  1. Editorial Team

    If the control itself is self contained and sufficiently complex to be called a view by itself, I would go with the approach of creating a separate viewmodel for the control itself, like you suggest. Otherwise, I’d just let it live in the view that it’s hosted in.

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