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

EventLog.CreateEventSource

<source lang="csharp">

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);
   }

}

 </source>

EventLog.Delete

<source lang="csharp">

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);
   }

}

 </source>

EventLog.DeleteEventSource

<source lang="csharp"> 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]);
           }
       }
   }

}

 </source>

EventLog.Entries

<source lang="csharp"> 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();
  }

}

 </source>

EventLog.Log

<source lang="csharp">

 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();
   }
 }
  
   
 </source>

EventLog.Source

<source lang="csharp">

 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();
   }
 }
  
   
 </source>

EventLog.SourceExists

<source lang="csharp">

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}       
       );
   }

}

 </source>

EventLog.WriteEntry

<source lang="csharp"> 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();
  }

}

 </source>

new EventLog()

<source lang="csharp"> 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 );
   }

}

 </source>