Cross-thread error in debug mode, works fine outside VS

>Hi,
I was looking for an example on CodeProject and saw an interesting
thing, i downloaded the article source code and converted to my VB
2005 Express and compiled with no problem, however when i debug the
program to and split a file(size doesn't matter) in debug mode with
VS, that is, a file merge-split tool, nearly i always get a "cross-
thread operation not valid" error for progress bar, whereas double
clicking and launching program without Visual Studio causes no problem
and runs just fine.

Here is article:
http://www.codeproject.com/KB/files/...erge_tool.aspx

Here is source code:
http://www.codeproject.com/KB/files/...SplitMerge.zip

I read similar issues on the net about VS but none of them were
helpful,

Is there any bug in VS or is it a known indication? Because if it was
caused by Visual Studio, it's insane that every developer can be
forced to think that the error is being caused by a coding mistake, in
fact there's no problem if you don't debug it via VS.

Thanks,

Onur Güzel

Hi Onur,

If you are getting a cross thread exception, it means the UI control is
being updated from a non UI thread, in which case you should use
Control.Invoke

"kimiraikkonen" <kimiraikkone...@gmail.comwrote in message

news:5a**********************************@8g2000hs e.googlegroups.com...

Hi,
I was looking for an example on CodeProject and saw an interesting
thing, i downloaded the article source code and converted to my VB
2005 Express and compiled with no problem, however when i debug the
program to and split a file(size doesn't matter) in debug mode with
VS, that is, a file merge-split tool, nearly i always get a "cross-
thread operation not valid" error for progress bar, whereas double
clicking and launching program without Visual Studio causes no problem
and runs just fine.

Here is article:
http://www.codeproject.com/KB/files/...erge_tool.aspx

Here is source code:
http://www.codeproject.com/KB/files/...Tool/FileSplit...

I read similar issues on the net about VS but none of them were
helpful,

Is there any bug in VS or is it a known indication? Because if it was
caused by Visual Studio, it's insane that every developer can be
forced to think that the error is being caused by a coding mistake, in
fact there's no problem if you don't debug it via VS.

Thanks,

Onur Güzel

>
But it runs fine if i don't debug the project under VS 2005. I
recommend downloading and running the article source code given
previously to experience what i mean. Running program alone from "bin"
folder causes NO cross-thread error, but in debug mode i get cross-
thread error and that was the point i was wondering if it's Visual
Stutio's problem.

It's weird and important for VS.