What is a DispatcherFrame and how do I use it?

Asked Dec 07 '15 at 18:55

Active Dec 07 '15 at 18:55

Viewed 3,527 times

Here's the code provided by MSDN, although it doesn't appear to be clear on what it's doing:

[SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public void DoEvents()
{
    DispatcherFrame frame = new DispatcherFrame();
    Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background,
    new DispatcherOperationCallback(ExitFrame), frame);
    Dispatcher.PushFrame(frame);
}

public object ExitFrame(object f)
{
    ((DispatcherFrame)f).Continue = false;

    return null;
}

I've just noticed a similar implementation in some legacy code today where the DoEvents method was defined. Why do we need this and what does it mean to push a frame onto the dispatcher?

asked Dec 07 '15 at 18:55

William

1,837
2
22
36

1

[See here](http://stackoverflow.com/a/33008093/1136211). – Clemens Dec 07 '15 at 19:00
Also see http://stackoverflow.com/questions/4502037/where-is-the-application-doevents-in-wpf – Vatsan Dec 07 '15 at 19:55

What is a DispatcherFrame and how do I use it?

0 Answers0