process.GetProcessesByName getting error

[hangten]

I have a service that 1) uses filewatcher to watch a directory on a
remote machine.
2) checks if a certain application is running on the local machine
before starting it.

The problem is while checking for an existing instance of the
application. I do the following code :
Process[] processes = Process.GetProcessesByName(stProcName, localcpu);
Where stProcName is the process I am checking
localcpu is the local machine name.

When it trys to execute this command it gives me an error stating that
it cannot get the process information from the remote machine. I'm not
sure why it is trying to look at the remote machine or how what is
telling it to look over there. The only thing that should be looking
over to the remote machine is FileSystemWatcher.
Thanks for any help
Carol

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[Willy Denoyette [MVP]]

Why using the overload that takes a machine name? You know, that localcpu is
the local machine, but for the code any name for machineName is considered
remote.
Try using GetProcessesByName(stProcName); and you will get the same
exception, simply because the service has no sufficient rights to enumerate
all process.

Willy.

"hangten" <no******@pacbell.net> wrote in message
news:Oa***************@TK2MSFTNGP11.phx.gbl...

I have a service that 1) uses filewatcher to watch a directory on a
remote machine.
2) checks if a certain application is running on the local machine
before starting it.

The problem is while checking for an existing instance of the
application. I do the following code :
Process[] processes = Process.GetProcessesByName(stProcName, localcpu);
Where stProcName is the process I am checking
localcpu is the local machine name.

When it trys to execute this command it gives me an error stating that
it cannot get the process information from the remote machine. I'm not
sure why it is trying to look at the remote machine or how what is
telling it to look over there. The only thing that should be looking
over to the remote machine is FileSystemWatcher.
Thanks for any help
Carol

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[hangten]

What rights does it need ? I gave it admin. to see if it would work and
it did. But I can't do that on this system. Is there another way to
handle this ? Maybe another way to check if the application is running
?
Thanks
Carol
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[Willy Denoyette [MVP]]

"hangten" <no******@pacbell.net> wrote in message
news:ef**************@TK2MSFTNGP09.phx.gbl...

What rights does it need ? I gave it admin. to see if it would work and
it did. But I can't do that on this system. Is there another way to
handle this ? Maybe another way to check if the application is running
?

Yes, use the System.Management classes, next sample should get you started..

using System;
using System.Management;
class Sample_SelectQuery
{
public static void Main() {
string processName = "explorer.exe";
Console.WriteLine(IsProcessRunning(processName).To String());
}
private static bool IsProcessRunning(string procName)
{
bool ret = false;
SelectQuery selectQuery = new SelectQuery("select Name from Win32_Process
where name='" + procName + "'");
using(ManagementObjectSearcher searcher = new
ManagementObjectSearcher(selectQuery))
{
ManagementObjectCollection moc = searcher.Get();
if (moc.Count != 0)
{
ret = true; // OK process is running
}
return ret;
}
}
}

Willy.

[hangten]

Willy - Thanks for the info.. I added this code but am getting an error
when it does the moc.Count line of code. Here is what I added :
SelectQuery selectQuery = new SelectQuery("select Name from
Win32_Process where name='" + stProcName + "'");
ManagementObjectSearcher searcher = new
ManagementObjectSearcher(selectQuery);

ManagementObjectCollection moc = searcher.Get();
if (moc.Count != 0)
return true; // OK process is running
else
return false;

The error I am getting is the following :
COM object that has been separated from its underlying RCW can not be
used.

Am I missing something ?

The error was thrown at
System.Management.ManagementObjectCollection.GetEn umerator()
at System.Management.ManagementObjectCollection.get_C ount() at
ProcessExist.ProcExist.InstanceExist()

Thanks for your help
Carol
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[hangten]

Willy - Disregard my last message. I was getting that error because I
was in debug mode. Don't know why but it was OK afterwards. Also, I
didn't have the .exe in my variable that I was checking. It works great
and I want to thank you very much...

Carol

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