What does dispatcher invoke do?
Invoke(DispatcherPriority, TimeSpan, Delegate, Object) Executes the specified delegate at the specified priority with the specified argument synchronously on the thread the Dispatcher is associated with.
What is the relationship between threads and dispatchers?
A Dispatcher is responsible for managing the work for a thread. The UI thread is the thread that renders the UI. The UI thread queues work items inside an object called a Dispatcher. The Dispatcher selects work items on a priority basis and runs each one to completion.
What is dispatcher WPF?
WPF Dispatcher is associated with the UI thread. Whenever your changes the screen or any event executes, or call a method in the code-behind all this happen in the UI thread and UI thread queue the called method into the Dispatcher queue. Dispatcher execute its message queue into the synchronous order.
What is dispatcher pattern?
The command dispatcher pattern serves to decouple the implementation of a command from its commander. The commander doesn’t need to know how the execution of the command is implemented, only that the command exists. This pattern is particularly helpful to remove input concerns from the application business.
What is the difference between Invoke and BeginInvoke?
Invoke : Executes synchronously, on the same thread. BeginInvoke : Executes asynchronously, on a threadpool thread. Control. Invoke : Executes on the UI thread, but calling thread waits for completion before continuing.
What is .NET dispatcher?
The Dispatcher maintains a prioritized queue of work items for a specific thread. If you attempt to get the CurrentDispatcher for the current thread and a Dispatcher is not associated with the thread, a Dispatcher will be created. A Dispatcher is also created when you create a DispatcherObject.
What is a command dispatcher?
A Command Dispatcher is an object that links the Action-Request with the appropriate Action-Handler. It’s purpose is to decouple the command operation from the sending and receiving objects so that neither has knowledge of the other.