CODEWITHSUNDEEP
silverlightmvvm
user2091061
user2091061

Reputation: 877

Diffrence between Triggers, Behaviors and Commands in MVVM?

Can anyone please explain difference between Triggers, Behaviors and Commands. I tried to search on this, but could not find anything useful.

And would also like to know in which scenario which one should be preferred and which one is used frequently among them?

Upvotes: 0

Views: 193

Answers (1)

SeyedPooya Soofbaf
SeyedPooya Soofbaf

Reputation: 2649

Behavior is a way of interactivity without writing code. Behaviors makes interactivity much simpler for the designers. In short, a behavior is a reusable piece that encapsulates some functionality that can be attached to an object to extend its built-in interactivity capabilities.

Commands are used to encapsulate a piece of logic, which various Silverlight controls can bind to and execute in response to an event, such as a button being clicked. You can expose a command from a ViewModel as a property and bind the Command property of a control in the View to it. When the control is clicked, the command will be executed.

In MVVM scenarios, triggers are used to notifying the view of an event from a ViewModel.

For example, perhaps the view needs to navigate to another view once a save operation is complete. You can implement this behavior by raising an event from the ViewModel that the view can listen for by doing either of the following:

• Wiring up an event handler in the view’s code-behind and writing some code to respond to the event (Not recommended approach)

• Implementing a trigger in the view that listens for the event and responds accordingly

You can see this, this and this for more explanations.

Also, Pro Business Applications with Silverlight 5 is a very good reference for you.

Upvotes: 1

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