Refresh Screen from BackGround Thread.

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi Guys.

I have three Screens(screen1, screen2,screen3) and one of them maybe
displayed on foreGround with some Item.
screen1 is main screen, it holds screen2 and screen3 instance.

There is also a thread running on the background.It will start check
someinformation perdically,and will affect two screens displayed item in
screen1 and screen2.

if Thread only does affect screen1, I know
I should use delegate and to check screen1.invokeRequired or not.

Like:

Thread call:

private void DoUpdateComponent(object obj )
{
object[] objs = new object[1];
objs[0] = obj;
if (screen1.InvokeRequired)
{
// we were called on a worker thread
// marshal the call to the user interface thread
screen1.Invoke(new BlockRefreshDelegate(DoUpdateComponent),
objs[0]);
return;
}
// this code can only be reached
// by the user interface thread
screen1.UpdateComponent(objs[0]);
}
//Screen1 UpdateComponent function

public void UpdateComponent (Object obj){
//do something here
}

and Screen1 implenment the detail.
howerver, since thread also affect screen2.

and screen2 is created by screen1.
I do not know how to implement,

Do I just write some detail at screen1.UpdateComponent(objs[0]);

or should I create another delegate just like
private void DoUpdateComponent(object obj );
and the only diffence is I check screen2 invoke instead of screen1.

what I am understanding is that: I just write some source code
under screen1.DoUpdateComponent to implement screen2 refresh?

Is that right?
Thanks
 
The key is that ALL updates to the UI ust be made from the primary thread.
So any worker trying to update any Window must use Control.Invoke. How you
go about that is purely up to you and your design.
 
Back
Top