EventLog Constructor (String, String, String)
Assembly: System (in System.dll)
'Declaration Public Sub New ( _ logName As String, _ machineName As String, _ source As String _ )
This constructor sets the Log property to the logName parameter, the MachineName property to the machineName parameter, and the Source property to the source parameter. The Source property is required when writing to an event log. However, if you are only reading from an event log, only the Log and MachineName properties are required (as long as the event log on the server has a source already associated with it). If you are only reading from the event log, another overload of the constructor might suffice.
The following table shows initial property values for an instance of EventLog.
The following example writes an entry to an event log, "MyNewLog", on the local computer, using the source "MySource".
Option Strict Option Explicit Imports System Imports System.Diagnostics Imports System.Threading Class MySample Public Shared Sub Main() If Not EventLog.SourceExists("MySource") Then ' Create the source, if it does not already exist. ' 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") Console.WriteLine("CreatingEventSource") 'The source is created. Exit the application to allow it to be registered. Return End If ' Create an EventLog instance and assign its source. Dim myLog As New EventLog("myNewLog", ".", "MySource") ' Write an entry to the log. myLog.WriteEntry(("Writing to event log on " & myLog.MachineName)) End Sub ' Main End Class ' MySample
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2