Control invoking w/o creating a delegate

Hi,

I'm building a smart device windows app that performs some background
operation and that requires updating a progress bar.
Since I need to use the progress bar thread, I call MyProgressBar.Invoke()
method where I pass a delegate object.

The syntax is quite painfull since I need to create a custom delegate for
each modification of any control.

I'd like to use the anonymous delegate pattern, but it does not compile :

stepProgressBar.Invoke(
delegate(int progress)
{
_stepProgressBar.Value = progress;
},
new object[] { e.Progress }
);

The error is this error :
The best overloaded method match for
'System.Windows.Forms.Control.Invoke(System.Delegate, params object[])' has
some invalid arguments
Error 10 Argument '1': cannot convert from 'anonymous method' to
'System.Delegate'

I'd like to avoid building a custom delegate type like
public delegate void UpdateProgressBarDelegate(ProgressBar bar, int
progress);

Is there any correct syntax to reach my goal ?
Thanks,
Steve

Roman
Tue Oct 24 04:07:24 CDT 2006

Don't know whether you can fix this delegate problem. But why don't you
use BackgroundWorker? With backgroundworker there is no need to use
Invoke().

Steve
Tue Oct 24 04:17:59 CDT 2006

I don't use background worker since it does not exist in smartdevice
applications :)

But even if the bg worker have existed, the bg worker is sometimes quite
"too much" and moreover, I really like to know if there is an answer to my
question since threading in windows app is a recurent "problem" the BG
worker cannot always solve...

Thanks,
Steve

"Roman Wagner" <roman.wagner@gmail.com> a écrit dans le message de news:
1161680844.549191.207020@m73g2000cwd.googlegroups.com...
> Don't know whether you can fix this delegate problem. But why don't you
> use BackgroundWorker? With backgroundworker there is no need to use
> Invoke().
>