VB.NET Screen Stops Refreshing After Losing Focus??

[Chris Moore]

I have a .NET form where I am updating a progress bar & counter. As long
as the form never loses focus, everything on the form refreshs fine. But If
I open another window (like Windows Explorer) and then re-select my .net
form, thos fields no longer refresh. Why and ho wdo I make it start
refreshing again?

Thanks

[Mehdi]

On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:

I have a .NET form where I am updating a progress bar & counter. As long
as the form never loses focus, everything on the form refreshs fine. But If
I open another window (like Windows Explorer) and then re-select my .net
form, thos fields no longer refresh. Why and ho wdo I make it start
refreshing again?

It sounds like you're accessing some of your UI controls from a worker
thread (the progress bar and the counter probably). UI controls must be
accessed from the UI thread only. If you have to access them from a worker
thread, use Control.Invoke or Control.BeginInvoke to marshall the call to
the UI thread.

[Chris Moore]

Mehdi <vi****@REMOVEME.gmail.com> wrote in
I have no idea what you just said, sorry. What I have is 1 form with a
button, progress bar & label on it. When I run it, I press the button
that then calls a procedure (that is in the form) to process some records
and update the controls.

What am I missing or not understanding?

Thanks

news:he***************************@40tude.net:

On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:

I have a .NET form where I am updating a progress bar & counter. As
long as the form never loses focus, everything on the form refreshs
fine. But If I open another window (like Windows Explorer) and then
re-select my .net form, thos fields no longer refresh. Why and ho
wdo I make it start refreshing again?

It sounds like you're accessing some of your UI controls from a worker
thread (the progress bar and the counter probably). UI controls must
be accessed from the UI thread only. If you have to access them from a
worker thread, use Control.Invoke or Control.BeginInvoke to marshall
the call to the UI thread.

[tommaso.gastaldi]

try putting

Application.DoEvents()

within the loop

-tom

Chris Moore ha scritto:

Mehdi <vi****@REMOVEME.gmail.com> wrote in
I have no idea what you just said, sorry. What I have is 1 form with a
button, progress bar & label on it. When I run it, I press the button
that then calls a procedure (that is in the form) to process some records
and update the controls.

What am I missing or not understanding?

Thanks

news:he***************************@40tude.net:

On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:

I have a .NET form where I am updating a progress bar & counter. As
long as the form never loses focus, everything on the form refreshs
fine. But If I open another window (like Windows Explorer) and then
re-select my .net form, thos fields no longer refresh. Why and ho
wdo I make it start refreshing again?

It sounds like you're accessing some of your UI controls from a worker
thread (the progress bar and the counter probably). UI controls must
be accessed from the UI thread only. If you have to access them from a
worker thread, use Control.Invoke or Control.BeginInvoke to marshall
the call to the UI thread.

[ods]

That appears to have corrected it.

Thanks.
to**************@uniroma1.it wrote in
news:11**********************@y43g2000cwc.googlegr oups.com:

try putting

Application.DoEvents()

within the loop

-tom

Chris Moore ha scritto:

Mehdi <vi****@REMOVEME.gmail.com> wrote in
I have no idea what you just said, sorry. What I have is 1 form with
a button, progress bar & label on it. When I run it, I press the
button that then calls a procedure (that is in the form) to process
some records and update the controls.

What am I missing or not understanding?

Thanks

news:he***************************@40tude.net:

> On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
>
>> I have a .NET form where I am updating a progress bar & counter.
>> As long as the form never loses focus, everything on the form
>> refreshs fine. But If I open another window (like Windows
>> Explorer) and then re-select my .net form, thos fields no longer
>> refresh. Why and ho wdo I make it start refreshing again?
>
> It sounds like you're accessing some of your UI controls from a
> worker thread (the progress bar and the counter probably). UI
> controls must be accessed from the UI thread only. If you have to
> access them from a worker thread, use Control.Invoke or
> Control.BeginInvoke to marshall the call to the UI thread.
>

[tommaso.gastaldi]

good.
Applications are like humans, sometimes they need to breath :)

-tom

ods ha scritto:

That appears to have corrected it.

Thanks.
to**************@uniroma1.it wrote in
news:11**********************@y43g2000cwc.googlegr oups.com:

try putting

Application.DoEvents()

within the loop

-tom

Chris Moore ha scritto:

Mehdi <vi****@REMOVEME.gmail.com> wrote in
I have no idea what you just said, sorry. What I have is 1 form with
a button, progress bar & label on it. When I run it, I press the
button that then calls a procedure (that is in the form) to process
some records and update the controls.

What am I missing or not understanding?

Thanks

news:he***************************@40tude.net:

> On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
>
>> I have a .NET form where I am updating a progress bar & counter.
>> As long as the form never loses focus, everything on the form
>> refreshs fine. But If I open another window (like Windows
>> Explorer) and then re-select my .net form, thos fields no longer
>> refresh. Why and ho wdo I make it start refreshing again?
>
> It sounds like you're accessing some of your UI controls from a
> worker thread (the progress bar and the counter probably). UI
> controls must be accessed from the UI thread only. If you have to
> access them from a worker thread, use Control.Invoke or
> Control.BeginInvoke to marshall the call to the UI thread.
>

[OC]

Good grief! I've Googled high and low for this answer. I

've been developing Web apps for so long I'd forgotten how to do this.
I know this is not the way I used to do it but this is far easier.
Thank you so much!

-Olice