Stand alone Executable return argument

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Guest

Hi,
I have a very serious issue at hand. I have created a small C# Console App
(Csd.exe) that collects a list of files as its argument and generates their
Md5 sets.
This application is used by other applications in my dept, which simply call
this Csd.exe app and passing a list of files.
I want to ask how can I return a value from this Csd.exe application as an
indicator or a signal to the calling app that Csd.exe has finished working.
The problem is that the main component of my Csd.exe is a

public static void main(string[] args)
{
//All the work
//And that is it (done)!
//Here i want to enter a return int or a bool (true) so that the caller
can know
//that i am finished processing....
}

The Static void main does not let me return anything. How can i do that.

Please HELP!

Thanks and Regards
Sunny
 
Sunny,

You really aren't going to be able to pass a value back through the
executable. The best you could do is pass an integer back to the process
that triggered you.

If possible, you should refactor this code out into a component, and
integrate that component into the other applications that need it. It would
be easy enough to expose this as a .NET and a COM component, which should
allow you to access it from almost anywhere.

If you need to keep this as an executable, then you might want to
consider having it write out files to another directory, which you can
relate to the original files, which have the MD5 hash in them, or store the
hashes in some other persistant format (like a database) where the other
applications can get to it.

Hope this helps.
 
I appreciate all the help, I am in fact writing out a set of Xml files at
this time as my work process and at the end of the process i am infact
invoking a third application that in turns (indirectly) signals to my caller
as a signal of my work completion. However this app is being used almost by
all the other apps and i have been told to return a signal to the caller that
i have finished my work in addition to the files written out, since they
don't always want to go and read the files as such.

But I think there has got to be a way for the. static void main(string[]
args) to return some signal values to their callers, this simply defies all
logic that this is not prossible in this scenario...
would look forward to any more suggestions. . .

Thanks for the Help,

With Regards
Sunny



Nicholas Paldino said:
Sunny,

You really aren't going to be able to pass a value back through the
executable. The best you could do is pass an integer back to the process
that triggered you.

If possible, you should refactor this code out into a component, and
integrate that component into the other applications that need it. It would
be easy enough to expose this as a .NET and a COM component, which should
allow you to access it from almost anywhere.

If you need to keep this as an executable, then you might want to
consider having it write out files to another directory, which you can
relate to the original files, which have the MD5 hash in them, or store the
hashes in some other persistant format (like a database) where the other
applications can get to it.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Sunny said:
Hi,
I have a very serious issue at hand. I have created a small C# Console App
(Csd.exe) that collects a list of files as its argument and generates
their
Md5 sets.
This application is used by other applications in my dept, which simply
call
this Csd.exe app and passing a list of files.
I want to ask how can I return a value from this Csd.exe application as an
indicator or a signal to the calling app that Csd.exe has finished
working.
The problem is that the main component of my Csd.exe is a

public static void main(string[] args)
{
//All the work
//And that is it (done)!
//Here i want to enter a return int or a bool (true) so that the caller
can know
//that i am finished processing....
}

The Static void main does not let me return anything. How can i do that.

Please HELP!

Thanks and Regards
Sunny
Click to expand...
Click to expand...
 
Hi Nicholas great to see you finally after a long time.
Thanks for the info, infact i am writing out an xml file as my work process
and at the end my app is invoking a third application that signals to my
caller as a signal of my work completion, but this app is being used by a lot
of apps in my dept and there is a req now that it must return a signal value
so that the caller does not always have to go and check something else to
find out if i have finished.
I was thinking there would be a better way to return a status signal to the
callers even in a static void main implementations

public static void main(string[] args)
{
//All the work
myInternalClass mc = new myInternalClass(args);
//Now finished and return something
}

Thanks for all the help, and welcome for more suggestions. ..

With Regards
Sunny



Nicholas Paldino said:
Sunny,

You really aren't going to be able to pass a value back through the
executable. The best you could do is pass an integer back to the process
that triggered you.

If possible, you should refactor this code out into a component, and
integrate that component into the other applications that need it. It would
be easy enough to expose this as a .NET and a COM component, which should
allow you to access it from almost anywhere.

If you need to keep this as an executable, then you might want to
consider having it write out files to another directory, which you can
relate to the original files, which have the MD5 hash in them, or store the
hashes in some other persistant format (like a database) where the other
applications can get to it.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Sunny said:
Hi,
I have a very serious issue at hand. I have created a small C# Console App
(Csd.exe) that collects a list of files as its argument and generates
their
Md5 sets.
This application is used by other applications in my dept, which simply
call
this Csd.exe app and passing a list of files.
I want to ask how can I return a value from this Csd.exe application as an
indicator or a signal to the calling app that Csd.exe has finished
working.
The problem is that the main component of my Csd.exe is a

public static void main(string[] args)
{
//All the work
//And that is it (done)!
//Here i want to enter a return int or a bool (true) so that the caller
can know
//that i am finished processing....
}

The Static void main does not let me return anything. How can i do that.

Please HELP!

Thanks and Regards
Sunny
Click to expand...
Click to expand...
 
Just change public static void main to public static int main, and return
whever error code you want to return to the process. Then any other process
running your EXE can check the return code.

--Bob
 
Sunny,

You could do a number of things, but you won't be able to get a return
value back through the parameters, or through the return value. The entry
point for the application can only return an integer (which does not meet
your needs) and it can not modify the command line arguments. Any signal
that you send (perhaps an event, not the kind in .NET, but the
synchronization object) would have to be something that the other programs
actively listen for.

Because of these needs, it really is a better idea if you place it in a
component and have the clients or something else call the component. This
way, you can be more sure when the method completes, (instead of waiting for
an event, you just wait until the method call completes).


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Sunny said:
I appreciate all the help, I am in fact writing out a set of Xml files at
this time as my work process and at the end of the process i am infact
invoking a third application that in turns (indirectly) signals to my
caller
as a signal of my work completion. However this app is being used almost
by
all the other apps and i have been told to return a signal to the caller
that
i have finished my work in addition to the files written out, since they
don't always want to go and read the files as such.

But I think there has got to be a way for the. static void main(string[]
args) to return some signal values to their callers, this simply defies
all
logic that this is not prossible in this scenario...
would look forward to any more suggestions. . .

Thanks for the Help,

With Regards
Sunny



Nicholas Paldino said:
Sunny,

You really aren't going to be able to pass a value back through the
executable. The best you could do is pass an integer back to the process
that triggered you.

If possible, you should refactor this code out into a component, and
integrate that component into the other applications that need it. It
would
be easy enough to expose this as a .NET and a COM component, which should
allow you to access it from almost anywhere.

If you need to keep this as an executable, then you might want to
consider having it write out files to another directory, which you can
relate to the original files, which have the MD5 hash in them, or store
the
hashes in some other persistant format (like a database) where the other
applications can get to it.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Sunny said:
Hi,
I have a very serious issue at hand. I have created a small C# Console
App
(Csd.exe) that collects a list of files as its argument and generates
their
Md5 sets.
This application is used by other applications in my dept, which simply
call
this Csd.exe app and passing a list of files.
I want to ask how can I return a value from this Csd.exe application as
an
indicator or a signal to the calling app that Csd.exe has finished
working.
The problem is that the main component of my Csd.exe is a

public static void main(string[] args)
{
//All the work
//And that is it (done)!
//Here i want to enter a return int or a bool (true) so that the
caller
can know
//that i am finished processing....
}

The Static void main does not let me return anything. How can i do
that.

Please HELP!

Thanks and Regards
Sunny
Click to expand...
Click to expand...
Click to expand...
 
Hi Sunny,
The Static void main does not let me return anything. How can i do that.
Click to expand...

Main method can return an integer. The caller can check the return value
using its prcess handler or in realm of .NET using object of the Process
class.

If you only want to signal when the *exe* finish you have options. Look at
the Process class
You are going to use that class either to start the *exe* or to attach to
already running one.

Then your options are:
1. To block the caller until the other process finishes -
Process.WaitForExit and then if you need to check Process.ExitCode, which is
whatever integer the *exe*'s main method returns
2. To check periodically Porcess.HasExited and if it has to get the ExitCode
3. To hook on Exited event. It will be fired as soon as the process exits.
And then again you can check its ExitCode.

Even thought the process may exited long time ago its ExitCode will stay
valid until you dispose the process object (or close the process handle in
terms of Win32 API).

You can dispose the process by call its Dispose or you can leave this to the
the GC.

If you need to communicate big chunk of data, though, what you can do is
either to use files, or redirect the standart input and output. I believe
that using sockets or .NET remoting isn't worth it. Actually, do you have
some options here as well.
 
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