Csharp/C Sharp by API/System.Diagnostics/EventLog

EventLog.CreateEventSource

  

using System;
using System.Diagnostics;
class MainClass {
    public static void Main() {
        string source = "EventSource";
        string log = "MainClass.LOG";
        EventLog el = new EventLog();
        if (!EventLog.SourceExists(source)) {
            EventLog.CreateEventSource(source, log);
        }
        el.Source = source;
        String message = "Starting Up";
        el.WriteEntry(message, EventLogEntryType.Information);
        message = "Processing";
        el.WriteEntry(message, EventLogEntryType.Information);
        message = "Shutting down";
        el.WriteEntry(message, EventLogEntryType.Information);
        el = new EventLog();
        if (!EventLog.SourceExists(source)) {
            Console.WriteLine("Event Log does not exist!");
            return;
        }
        el.Source = source;
        foreach (EventLogEntry entry in el.Entries) {
            Console.WriteLine("\tEntry: " + entry.Message);
        }
        EventLog.Delete(log);
    }
}

EventLog.Delete

  


using System;
using System.Diagnostics;
class MainClass {
    public static void Main() {
        string source = "EventSource";
        string log = "MainClass.LOG";
        EventLog el = new EventLog();
        if (!EventLog.SourceExists(source)) {
            EventLog.CreateEventSource(source, log);
        }
        el.Source = source;
        String message = "Starting Up";
        el.WriteEntry(message, EventLogEntryType.Information);
        message = "Processing";
        el.WriteEntry(message, EventLogEntryType.Information);
        message = "Shutting down";
        el.WriteEntry(message, EventLogEntryType.Information);
        el = new EventLog();
        if (!EventLog.SourceExists(source)) {
            Console.WriteLine("Event Log does not exist!");
            return;
        }
        el.Source = source;
        foreach (EventLogEntry entry in el.Entries) {
            Console.WriteLine("\tEntry: " + entry.Message);
        }
        EventLog.Delete(log);
    }
}

EventLog.DeleteEventSource

  
using System;
using System.Diagnostics;
namespace nsEventLogs
{
    public class RemSrc
    {
        static public void Main (string [] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine ("Please enter an event source to remove.");
                Console.WriteLine ("Usage: RemSrc [source]");
                return;
            }
            if (EventLog.SourceExists (args[0]))
            {
                Console.WriteLine ("Deleting event log source " + args[0]);
                EventLog.DeleteEventSource (args[0]);
            }
        }
    }
}

EventLog.Entries

  
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft.Win32;
using System.Diagnostics;
public class MainClass{
   public static void Main(){
    EventLog log = new EventLog();
    for(int i = 0; i < 5; i++)
    {
      try
      {
        Console.WriteLine("Message: " + log.Entries[i].Message + "\n" +  
          "Box: " + log.Entries[i].MachineName + "\n" +
          "App: " + log.Entries[i].Source + "\n" +
          "Time entered: " + log.Entries[i].TimeWritten);
      }
      catch{}
    }
    log.Close();
   }
}

EventLog.Log

  

  using System;
  using System.Resources;
  using System.Drawing;
  using System.Collections;
  using System.Windows.Forms;
  using System.Resources;
  using Microsoft.Win32;
  // For event log.
  using System.Diagnostics;
  class Test
  {
    static void Main(string[] args)
    {
      EventLog log = new EventLog();
      log.Log = "Application";
      log.Source = "www.nfex.ru";
      log.WriteEntry("message from my own exa,ple...");
      
      // Display the first 5 entries in the Application log.
      for(int i = 0; i < 5; i++)
      {
                Console.WriteLine("Message: " + log.Entries[i].Message + "\n" +  
            "Box: " + log.Entries[i].MachineName + "\n" +
            "App: " + log.Entries[i].Source + "\n" +
            "Time entered: " + log.Entries[i].TimeWritten, 
            "Application Log entry:");
      }
      log.Close();
    }
  }

EventLog.Source

  
  using System;
  using System.Resources;
  using System.Drawing;
  using System.Collections;
  using System.Windows.Forms;
  using System.Resources;
  using Microsoft.Win32;
  // For event log.
  using System.Diagnostics;
  class Test
  {
    static void Main(string[] args)
    {
      EventLog log = new EventLog();
      log.Log = "Application";
      log.Source = "www.nfex.ru";
      log.WriteEntry("message from my own exa,ple...");
      
      // Display the first 5 entries in the Application log.
      for(int i = 0; i < 5; i++)
      {
                Console.WriteLine("Message: " + log.Entries[i].Message + "\n" +  
            "Box: " + log.Entries[i].MachineName + "\n" +
            "App: " + log.Entries[i].Source + "\n" +
            "Time entered: " + log.Entries[i].TimeWritten, 
            "Application Log entry:");
      }
      log.Close();
    }
  }

EventLog.SourceExists

  

using System;
using System.Diagnostics;
class MainClass
{
    public static void Main () 
    {
        if (!EventLog.SourceExists("MyEventSource")) 
        {
            EventLog.CreateEventSource("MyEventSource", "Application");
        }
        EventLog.WriteEntry(
            "MyEventSource",               
            "A simple test event.",        
            EventLogEntryType.Information, 
            1,                             
            0,                             
            new byte[] {10, 55, 200}       
        );
    }
}

EventLog.WriteEntry

  
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft.Win32;
using System.Diagnostics;
public class MainClass{
   public static void Main(){
    EventLog log = new EventLog();
    log.Log = "Application";
    log.Source = "MainClass";
    log.WriteEntry("Hey");
    log.Close();
   }
}

new EventLog()

  
using System;
using System.Collections;
using System.ruponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
public class Service1 : System.ServiceProcess.ServiceBase
{
    private System.Diagnostics.EventLog eventLog1;
    public Service1()
    {
        this.eventLog1 = new System.Diagnostics.EventLog();
        ((System.ruponentModel.ISupportInitialize)(this.eventLog1)).BeginInit();
        this.eventLog1.Log = "MyCustomLog";
        this.eventLog1.Source = "CustomEventService2";
        this.AutoLog = false;
        this.ServiceName = "CustomEventService";
        ((System.ruponentModel.ISupportInitialize)(this.eventLog1)).EndInit();
    }
    static void Main()
    {
        System.ServiceProcess.ServiceBase[] ServicesToRun;
        ServicesToRun = new System.ServiceProcess.ServiceBase[] { new Service1() };
        System.ServiceProcess.ServiceBase.Run(ServicesToRun);
    }
    protected override void OnStart(string[] args)
    {
        if ( !EventLog.SourceExists( eventLog1.Source ) )
        {
            EventLog.CreateEventSource( eventLog1.Source, eventLog1.Log );
        }
        eventLog1.WriteEntry( "Hello", EventLogEntryType.Information );
    }
    protected override void OnStop()
    {
        eventLog1.WriteEntry( "Goodbye", EventLogEntryType.Warning );
    }
}