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The "Silent Process Service"

, 3 May 2006
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Convert an application to a service without modifying any code.

Introduction

Recently, I ran into a situation where I needed to make an application launch automatically on start up. The problem was that the program that I needed to launch was designed as a WinForms application. Therefore, the only way to make it launch automatically was to make the computer automatically login and run the application. Unfortunately, the company I was working for had a strict security policy, and forcing a computer to automatically login was out of the question.

Originally, I thought about converting the entire application to an NT service. However, I was on a tight deadline, and removing the UI code would have required some extensive work and additional testing. Therefore, I needed an alternative solution. After digging around on the internet for a while, I discovered the ProcessStartInfo class. Suddenly, the light bulb turned on in my head, and I starting developing a new service which I have dubbed as the "Silent Process"...

Using the code

The code is very simple, and for the most part, self-explanatory. The service contains an OnStart and an OnStop method.

In the OnStart method, I instantiate a new ProcessStartInfo object. I then set the CreateNoWindow property to true. This way, I can run the WinForms application in the background. I also set the WindowStyle property to Hidden just as an extra precaution. The remaining properties are read from the app.config file. By modifying the configuration file, you can virtually make any application run as a service!

In the OnStop method, I check for any processes that I may have launched. If I find any matching processes, I kill them.

protected override void OnStart(string[] args){
    KillExistingProcesses();

    try {
        ProcessStartInfo startInfo = new ProcessStartInfo();
        startInfo.CreateNoWindow = true;
        startInfo.WorkingDirectory = 
          @ConfigurationSettings.AppSettings["working_directory"];
        startInfo.FileName = 
          ConfigurationSettings.AppSettings["executable_name"];
        startInfo.WindowStyle = ProcessWindowStyle.Hidden;
        Process.Start( startInfo );
    }
    catch( Exception ex ) {
        Console.WriteLine( ex.Message );
    }
}

private void KillExistingProcesses(){
    Process[] processes = Process.GetProcessesByName( 
      ConfigurationSettings.AppSettings["executable_name"].Replace(
      ".exe", String.Empty ) );
    foreach( Process process in processes ) {
        process.Kill();
    }
}

protected override void OnStop(){
    KillExistingProcesses();
}

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Michael Ceranski
Software Developer (Senior) Concepts2Code
United States United States
Michael is the co-founder and master consultant for Concepts2Code, a software consulting company based in Buffalo, New York. He's been programming since the early 1990's. His vast programming experience includes VB, Delphi, C#, ASP, ASP.NET, Ruby on Rails, Coldfusion and PHP. Michael also is a Microsoft Certified Application Developer and a Certified Technology Specialist for SQL Server.
 
Visit his blog.

Comments and Discussions

 
GeneralGood Pinmemberloyal ginger5-Nov-09 7:30 
GeneralMy vote of 1 PinmemberParesh Gheewala1-Dec-08 21:13 
GeneralWindows Server 2003 Pinmemberlongg20-Sep-07 9:46 
GeneralRe: Windows Server 2003 PinmemberMichael Ceranski20-Sep-07 10:58 
GeneralGUI applications should not be services Pinmemberpalmer_tr16-May-06 17:09 
GeneralRe: GUI applications should not be services PinmemberMichael Ceranski17-May-06 3:16 
GeneralRe: GUI applications should not be services PinmemberchefZ10-Jun-07 18:57 
GeneralApplication doesn't display Pinmemberjmlfdcguy11-May-06 4:00 
GeneralRe: Application doesn't display PinmemberMichael Ceranski17-May-06 3:19 
GeneralRe: Application doesn't display Pinmemberbytebugs29-Jun-06 0:21 
QuestionKill? Pinmemberwindrago9-May-06 7:38 
AnswerRe: Kill? PinmemberMichael Ceranski17-May-06 3:22 
GeneralRe: Kill? PinmemberP@trickP15-Oct-07 22:58 
QuestionWhat about GUI interface? Pinmembervarnk9-May-06 3:46 
GeneralWorkarounds... PinmemberFabrice Vergnenegre3-May-06 12:22 

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