8/6/2019 To mt Windows Service trong C#

1/6

NOTE: The project name in this sample code is mcWebService which is a spelling mistake.

I meant to put mcWinService. And now I don't want to change all the screen shots and

code all over again. I hope it won't confuse you .

Ok, its time for one more tutorial. This times pick is Windows Services. Creating Windows

Services is not a big deal using C# and Visual Studio. Just follow few simple steps and you

are all set to run and test your first Windows Service.Windows Services is new name for NT Services you used to develop in previous versions of

Visual Studio. This tutorial walks you through how to create and use your Windows

Services. This Service writes some text to a text file when stop and start the service. The

base idea is taken from MSDN but its more elaborated. You can modify it according to your

needs.Step 1. Create Skeleton of the ServiceTo create a new Window Service, pick Windows Service option from your Visual C# Projects,

give your service a name, and click OK.

The result look like this. The Wizard adds WebService1.cs class to your project.

8/6/2019 To mt Windows Service trong C#

2/6

Set your ServiceName to your own name so it would be easier to recognize your service

during testing ORyou can set this property programmatically using this line

this.ServiceName = "mcWinService";This is the name you will be looking for later .

8/6/2019 To mt Windows Service trong C#

3/6

The default code of WebService1.cs added by the Wizard looks like herenamespace mcWebService

{

using System;using System.Collections;

using System.Core;

using System.ComponentModel;

using System.Configuration;

using System.Data;

using System.Web.Services;

using System.Diagnostics;

using System.ServiceProcess;

publicclass WinService1 : System.ServiceProcess.ServiceBase

{

//////Required designer variable.

///

private System.ComponentModel.Container components;

public WinService1()

{

// This call is required by the WinForms Component Designer. InitializeComponent();

// TODO: Add any initialization after the InitComponent call

8/6/2019 To mt Windows Service trong C#

4/6

}

// The main entry point for the process

staticvoid Main()

{

System.ServiceProcess.ServiceBase[] ServicesToRun;

// More than one user Service may run within the same process. To add// another service to this process, change the following line to

/ create a second service object. For example,

//

// ServicesToRun = New System.ServiceProcess.ServiceBase[] {new WinService1(), new

ySecondUserService()};

//

ServicesToRun = new System.ServiceProcess.ServiceBase[] { new WinService1() };

System.ServiceProcess.ServiceBase.Run(ServicesToRu n);

}

///

///Required method for Designer support - do not modify/// the contents of this method with the code editor.

///

privatevoid InitializeComponent()

{

components = new System.ComponentModel.Container();

this.ServiceName = "WinService1";

}

///

/// Set things in motion so your service can do its work.

///

protectedoverridevoidOnStart(string[] args){

// TODO: Add code here to start your service.

}

///

/// Stop this service.

///

protectedoverridevoidOnStop()

{

// TODO: Add code here to perform any tear-down necessary to stop your service.

}

}}

Step 2. Add functionality to your serviceAs you saw WebService1.cs, there are two overridden functions OnStart and OnStop. The

OnStart function executes when you start your service and the OnStop function gets

execute when you stop a service. I write some text to a text file when you start and stop

the service.

8/6/2019 To mt Windows Service trong C#

5/6

protectedoverridevoidOnStart(string[] args)

{

FileStream fs = new FileStream(@"c:\temp\mcWindowsService.txt" ,

FileMode.OpenOrCreate, FileAccess.Write);

StreamWriter m_streamWriter = new StreamWriter(fs);

m_streamWriter.BaseStream.Seek(0, SeekO

rigin.End);m_streamWriter.WriteLine(" mcWindowsService: Service Started \n");

m_streamWriter.Flush();

m_streamWriter.Close();

}

///

/// Stop this service.

///

protectedoverridevoidOnStop()

{

FileStream fs = new FileStream(@"c:\temp\mcWindowsService.txt" ,

FileMode.OpenOrCreate, FileAccess.Write);StreamWriter m_streamWriter = new StreamWriter(fs);

m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);

m_streamWriter.WriteLine(" mcWindowsService: Service Stopped \n");

m_streamWriter.Flush();

m_streamWriter.Close();

}

Step 3: Install and Run the Service

Build of this application makes one exe, mcWinService.exe. You need to call installutil to

egister this service from command line.installutil C:\mcWebService\bin\Debug\mcWebService.exe

You use /u option to uninstall the service.

installutil /u C:\mcWebService\bin\Debug\mcWebService.exe

Run the applicationStep 4: Start and Stop the ServiceYou need to go to the Computer Management to Start to start and stop the service. You can

use Manage menu item by right clicking on My Computer.

8/6/2019 To mt Windows Service trong C#

6/6

Under Services and Applications, you will see the service mcWinService. Start and Stop

menu item starts and stops the service.

Step 5: Test the ServiceGo to your temp directory and see if text file is there with contents or not.

That's it.