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Robert
Robert

Reputation: 6226

DispatcherTimer Constructors

How come in some classes I have to specify this constructor to get the callback to be invoked?

_timer = new DispatcherTimer(DispatcherPriority.Normal, Application.Current.Dispatcher);

Instead of just:

_timer = new DispatcherTimer();

Upvotes: 2

Views: 454

Answers (1)

Reed Copsey
Reed Copsey

Reputation: 564333

The default constructor will use the current Dispatcher instead of the current application's Dispatcher. If this is called on a thread other than the UI thread, the first overload is required in order to get the correct synchronization context.

Upvotes: 3

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