Question

On Command attribute is NOT
used for which events​

Answer 1

Answer:

On Command attribute is NOT used for which events. 1. See answer. Unlocked badge showing an astronaut's boot touching down on the moon.

Explanation:

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Answer 2

Answer:

In MVVM, Button link not used in on command event View developers (designers) are solely responsible for the appearance of the program, while View Model developers (programmers) are only responsible for the behavior.

Explanation:

Consider a form that has a submit button. It is the programmer's fault if the form is not submitted to the database (for example); no one can blame the designer. Using event, on the other hand, means that everything is handled on the View side.

Command comes to the rescue in this situation. It enables programmers to implement logic before waiting for the designer to bind to it. Without the design (View), programmers can undertake unit testing and proudly declare that it works. If it breaks, it suggests the creator did not properly bind to it. The utility of MVVM would be reduced in this case. However, keep in mind that if you completely delete all views from the VS project, your View Model will still compile and run - just without a GUI or the ability to receive user inputs. Behavioral requirements make up the majority of project requirements, thus if your View Model works, you've met the majority of them. Finally, I'd want to point out that code-behind is acceptable as long as it only affects appearance and not behaviour, the majority of perfectionists would prefer to have no code behind them.