Export (0) Print
Expand All

EventLog Constructor (String, String)

Initializes a new instance of the EventLog class. Associates the instance with a log on the specified computer.

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)

public EventLog(
	string logName,
	string machineName
)

Parameters

logName
Type: System.String

The name of the log on the specified computer.

machineName
Type: System.String

The computer on which the log exists.

ExceptionCondition
ArgumentNullException

The log name is null.

ArgumentException

The log name is invalid.

-or-

The computer name is invalid.

This overload sets the Log property to the logName parameter and the MachineName property to the machineName parameter. Before calling WriteEntry, specify the Source property of the EventLog. If you are only reading Entries from the log, you can alternatively specify only the Log and MachineName properties.

NoteNote

This overload of the constructor specifies the Log and MachineName properties, but you can change either before reading the Entries property.

The following table shows initial property values for an instance of EventLog.

Property

Initial Value

Source

An empty string ("").

Log

The logName parameter.

MachineName

The machineName parameter.

The following example reads entries in the event log, "myNewLog", on the computer "myServer".

using System;
using System.Diagnostics;
using System.Threading;

class MySample{

    public static void Main()
    {
        // Create the source, if it does not already exist. 
        if (!EventLog.SourceExists("MySource"))
        {
            //An event log source should not be created and immediately used. 
            //There is a latency time to enable the source, it should be created 
            //prior to executing the application that uses the source. 
            //Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog", "myServer");
            Console.WriteLine("CreatedEventSource");
            Console.WriteLine("Exiting, execute the application a second time to use the source.");
            // The source is created.  Exit the application to allow it to be registered. 
            return;
        }
        // Create an EventLog instance and assign its log name.
        EventLog myLog = new EventLog("myNewLog", "myServer");

        // Read the event log entries. 
        foreach(EventLogEntry entry in myLog.Entries){
            Console.WriteLine("\tEntry: " + entry.Message);
        }                                                                     
    } 
}
   

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft