Not getting process state

[Ashutosh Bhawasinka]

Hi,
I am starting a process and I need to monitor it (wait and check if its
still responding).

But, I it seems that the Process.HasExited or Process.Exited doesn't work.

I just need to know if the process is running & responding.

I am using

void somefn(...)
{
if(...)
{
ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = this.Path;
psi.Arguments = this.CreateArguments();
psi.ErrorDialog = false;
psi.UseShellExecute = true; //tried with false also
Process p = Process.Start(psi);

p.Exited += new EventHandler(Exited);
while (p.HasExited)
{
Thread.Sleep(1000);
}
}
return Success;
}

void Exited(object sender, EventArgs e)
{
MessageBox.Show("Done");
}

The execution never enters the while loop nor the Exited method is called.

Any ideas???

Regards,
Ashutosh

 

[Gilles Kohl [MVP]]

Hi,
I am starting a process and I need to monitor it (wait and check if its
still responding).

But, I it seems that the Process.HasExited or Process.Exited doesn't work.

I just need to know if the process is running & responding.

I am using

void somefn(...)
{
if(...)
{
ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = this.Path;
psi.Arguments = this.CreateArguments();
psi.ErrorDialog = false;
psi.UseShellExecute = true; //tried with false also
Process p = Process.Start(psi);

p.Exited += new EventHandler(Exited);

Hmm, try swapping the two lines above ...

while (p.HasExited)

Don't you mean while(!p.HasExited)?

{
Thread.Sleep(1000);
}
}
return Success;
}

void Exited(object sender, EventArgs e)
{
MessageBox.Show("Done");
}

The execution never enters the while loop nor the Exited method is called.

Any ideas???

See above ...

Regards,
Gilles.

 

[Ashutosh Bhawasinka]

Hi,
Thanks for pointing out the mistake....it's such a silly one

Actually, I was more interested in the callback. Do, you have any clue
on that??

Regards,
Ashutosh

Gilles Kohl [MVP] wrote:.

 

[parez]

Hi,
Thanks for pointing out the mistake....it's such a silly one

Actually, I was more interested in the callback. Do, you have any clue
on that??

Regards,
Ashutosh

Gilles Kohl [MVP] wrote:.

That mite fix your problem. GC was probably taking your object
(process) since you were not waiting in that loop and that might be
the reason why Exited never got called..

 

[Gilles Kohl [MVP]]

Thanks for pointing out the mistake....it's such a silly one

Actually, I was more interested in the callback. Do, you have any clue
on that??

Try adding

p.EnableRaisingEvents = true;

Regards,
Gilles.

 

[Linda Liu[MSFT]]

Thanks all who help on this issue!

Hi Ashutosh,

In summary, there're three problems in your sample code snippet.

1. You should set the EnableRaisingEvents property of the Process to true
for the Process component to receive notification that the process has
exited.

2. You should subscribe the Exited event of the Process before call the
Start method of the Process.

3. Change the condition in the while statement to "!p.HasExited" within the
"somefn" method.

For more information about the Process's Exited event, please refer to the
following MSDN document:
https://msdn2.microsoft.com/en-us/library/system.diagnostics.process.exited.
aspx

Hope this helps.
If you have anything unclear, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
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[Ashutosh Bhawasinka]

Thanks everyone for your help. The issue is resolved now.

Looks like I was sleeping while writing that code

Regards,
Ashutosh