progress bar

[moley_cruz@yahoo.com.au]

Hi,
If i start a process using System.Diagnost ics.Process.Sta rt(myprog.exe,

myattributes)
is it possible to display a running process bar instead of showing a
DOS window which shows what the program is doing?
thanks

[Chris]

Re: progress bar

moley_cruz@yaho o.com.au wrote:[color=blue]
> Hi,
> If i start a process using System.Diagnost ics.Process.Sta rt(myprog.exe,
>
> myattributes)
> is it possible to display a running process bar instead of showing a
> DOS window which shows what the program is doing?
> thanks
>[/color]

You can use the ProcessInfo class to start the process with no window.
Don't know if that will do what you want.

Chris

[Steven Nagy]

Re: progress bar

Why don't you just run your progress bar in a seperate thread, instead
of a seperate process?
I think it would be safer that way (main program exits, so does
progress bar).
Also, you won't get a dos window (although use the Process Background
property to hide the dos prompt).

With a progress bar, you want to be able to call the STEP method to
make sure it actually increases as your program performs tasks.
This is a lot harder in another process (which is basically another
application) as opposed to another thread (same application).

Here's a simple example:

Dim frmProgress as new ProgressForm()
me.hide()
frmProgress.Sho w()

' do stuff
frmProgress.Pro gressBar.Step()

' do more stuff
frmProgress.Pro gressBar.Step()

' hack Microsoft site
frmProgress.Pro gressBar.Step()

' take over the world
frmProgress.Pro gressBar.Step()

frmProgress.Clo se()
me.Show()


Steven Nagy

[Lynn]

Re: progress bar

Hi Steven,
thanks for your reply but i do not understand what you mean.
I am a vb.net newbie

[Cor Ligthert [MVP]]

Re: progress bar

Lynn,

You don't have control of the process that is running in the DosBox.
Therefore the steps of the progressbar can not be measured. A progressbar
needs a begin, an end and the steps to reach that. You have only the begin.

I hope this gives an idea

Cor

"Lynn" <moley_cruz@yah oo.com.au> schreef in bericht
news:1142250377 .469111.27630@p 10g2000cwp.goog legroups.com...[color=blue]
> Hi Steven,
> thanks for your reply but i do not understand what you mean.
> I am a vb.net newbie
>[/color]

[Steven Nagy]

Re: progress bar

What part don't you understand?
What is your final objective here? Perhaps give more of a rundown of
what you are trying to achieve.

Steve

[Lynn]

Re: progress bar

i need to run a batch file from my windows form. Instead of displaying
what i am running to the user, i want to hide the DOS window and
replace it with a progress bar to tell me that the batch file is still
running. Not sure if this is possible.

[Cor Ligthert [MVP]]

Re: progress bar

Lynn,

That is in my opinion not possible. What is mostly done (as well by
Microsoft) is showing an AVI until the waitforexit is done.

http://msdn.microsoft.com/library/de...exittopic2.asp


Those AVI's are in Visual Studio Net somewhere in the program files (it can
be that you first have to unpack the zip file with those)

I hope this helps,

Cor.

[Lynn]

Re: progress bar

if i use WaitForExit my windows form hangs with a white foreground
until the DOS command has finished executing.
is this normal? can this be overcome?

[Lynn]

Re: progress bar

Cor,
can you also post a sample code on how showing an AVI is used with
waitforexit?
thanks

[Cor Ligthert [MVP]]

Re: progress bar

Lynn,

I have not the time to make a sample now however in pseudo code (almost
real).

Open a new project
Drag on that an picturebox
Set the image to a *gif* file.
You can find those in gif animations in
C:\Program Files\Microsoft Visual Studio 8\Common7\VS200 5ImageLibrary

set the picturebox to visible = false

picturebox1.vis ible = true

Dim p As New System.Diagnost ics.ProcessStar tInfo()
p.Verb = "print"
p.CreateNoWindo w = True
p.WindowStyle = ProcessWindowSt yle.Hidden
p.FileName = "C:\filename.ex e"
Dim pr As System.Diagnost ics.Process = System.Diagnost ics.Process.Sta rt(p)
pr.WaitForExit( )

picturebox1.vis ible = false

I hope this helps,

Cor

[Steven Nagy]

Re: progress bar

Run the 'wait for exit' in a seperate thread. Have it raise an event
when done.
Have you main form catch the event and hide the pic box.

SN

[Cor Ligthert [MVP]]

Re: progress bar

Steven,
[color=blue]
> Run the 'wait for exit' in a seperate thread. Have it raise an event[/color]

Why a seperate thread to run a Gif? The Dos process itself is already in a
seperated process.

Cor

[Steven Nagy]

Re: progress bar

Its not the dos process that is the issue.
Its the main UI thread being told to wait for exit.
Which means I won't spend any time on redrawing your screen while its
waiting, thus the whiteness you mentioned.

[Lynn]

Re: progress bar

can you post a sample code on this -> 'wait for exit' in a seperate
thread. Have it raise an event when done.
thanks in advance