WindowsService

website Link -  http://www.c-sharpcorner.com/article/creating-a-windows-service-in-C-Sharp/


Snippet: 


namespace 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; 
public class WinService1 : System.ServiceProcess.ServiceBase 
{ 
/// <summary> 
/// Required designer variable. 
/// </summary> 
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 
} 
// The main entry point for the process 
static void 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(ServicesToRun); 
} 
/// <summary> 
/// Required method for Designer support - do not modify 
/// the contents of this method with the code editor. 
/// </summary> 
private void InitializeComponent() 
{ 
components = new System.ComponentModel.Container(); 
this.ServiceName = "WinService1"; 
} 
/// <summary> 
/// Set things in motion so your service can do its work. 
/// </summary> 
protected override void OnStart(string[] args) 
{ 
// TODO: Add code here to start your service. 
} 
/// <summary> 
/// Stop this service. 
/// </summary> 
protected override void OnStop() 
{ 
// TODO: Add code here to perform any tear-down necessary to stop your service. 
} 
} 
} 

Step 2. Add functionality to your service

As 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.

protected override void OnStart(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, SeekOrigin.End); 
m_streamWriter.WriteLine(" mcWindowsService: Service Started \n"); 
m_streamWriter.Flush();
m_streamWriter.Close(); 
} 
/// <summary> 
/// Stop this service. 
/// </summary> 
protected override void OnStop() 
{ 
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 application

Step 4: Start and Stop the Service

You 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.