Wpf dispatcher invoke freezes meaning

Invoke attempts to synchronously run the specified action on the dispatcher thread. Whenever your changes the screen or any event executes, or call a method in the codebehind all this happen in the ui thread and ui thread queue the called method into the dispatcher queue. Next your thread has to call invoke synchronous or begininvoke asynchronous passing a delegate for the dispatcher to invoke. Begininvoke but same result, dispatcher freeze occur after opening and closing the window. But the problem is the program freezes at the dispatcher. With begininvoke, the call is made by the worker thread but dispatcher never invokes the passed delegate. Also, dispatcher can be used to delay a task until the current task is executed.

This thread will not continue past this line until the click event handler above runs. For example, a background thread that is spun off from the main ui thread cannot update the contents of a button that was created on the ui thread. Assuming the runclient is run on the dispatcher thread, and the while loop continues to run while you are trying to invoke back onto the dispatcher thread, the call will freeze. The wpf developers cannot avoid using the dispatcher class. The file has a name of a db entity, so i naturally download it and try to show it to user. Invokeaction, dispatcherpriority invokeaction, dispatcherpriority invokeaction, dispatcherpriority invokeaction, dispatcherpriority executes the specified action synchronously at the specified priority on the thread the dispatcher is associated with. In order to use a background thread to update a control you have to get that controls dispatcher.

The ui thread queues methods call inside the dispatcher object. Assuming mycontrol has already been defined as a control. Also tried logging in multiple threads after opening. Creation of a thread this way is expensive there are three alternatives which are faster, but you did not report any observable delay before the invocation of the viewer property. In wpf, only the thread that created a dispatcherobject may access that object.