public class EventLogAppender : AppenderSkeleton

Public Class EventLogAppender
	Inherits AppenderSkeleton

public ref class EventLogAppender : public AppenderSkeleton

type EventLogAppender =  
    class
        inherit AppenderSkeleton
    end

The EventLogAppender type exposes the following members.

	Name	Description
	EventLogAppender	Initializes a new instance of the EventLogAppender class.
	EventLogAppender(ILayout)	Obsolete. Initializes a new instance of the EventLogAppender class with the specified ILayout.

	Name	Description
	ApplicationName	Property used to set the Application name. This appears in the event logs when logging.
	Category	Gets or sets the Category to use unless one is explicitly specified via the LoggingEvent's properties.
	ErrorHandler	Gets or sets the IErrorHandler for this appender. (Inherited from AppenderSkeleton.)
	EventId	Gets or sets the EventId to use unless one is explicitly specified via the LoggingEvent's properties.
	FilterHead	The filter chain. (Inherited from AppenderSkeleton.)
	Layout	Gets or sets the ILayout for this appender. (Inherited from AppenderSkeleton.)
	LogName	The name of the log where messages will be stored.
	MachineName	This property is used to return the name of the computer to use when accessing the event logs. Currently, this is the current computer, denoted by a dot "."
	Name	Gets or sets the name of this appender. (Inherited from AppenderSkeleton.)
	RequiresLayout	This appender requires a log4net.Layout to be set. (Overrides AppenderSkeletonRequiresLayout.)
	SecurityContext	Gets or sets the SecurityContext used to write to the EventLog.
	Threshold	Gets or sets the threshold Level of this appender. (Inherited from AppenderSkeleton.)

	Name	Description
	ActivateOptions	Initialize the appender based on the options set (Overrides AppenderSkeletonActivateOptions.)
	AddFilter	Adds a filter to the end of the filter chain. (Inherited from AppenderSkeleton.)
	AddMapping	Add a mapping of level to EventLogEntryType - done by the config file
	Append(LoggingEvent)	Append a bulk array of logging events. (Inherited from AppenderSkeleton.)
	Append(LoggingEvent)	This method is called by the DoAppend(LoggingEvent) method. (Overrides AppenderSkeletonAppend(LoggingEvent).)
	ClearFilters	Clears the filter list for this appender. (Inherited from AppenderSkeleton.)
	Close	Closes the appender and release resources. (Inherited from AppenderSkeleton.)
	DoAppend(LoggingEvent)	Performs threshold checks and invokes filters before delegating actual logging to the subclasses specific [M:Append(LoggingEvent)] method. (Inherited from AppenderSkeleton.)
	DoAppend(LoggingEvent)	Performs threshold checks and invokes filters before delegating actual logging to the subclasses specific [M:Append(LoggingEvent[])] method. (Inherited from AppenderSkeleton.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	FilterEvent	Test if the logging event should we output by this appender (Inherited from AppenderSkeleton.)
	Finalize	Finalizes this appender by calling the implementation's Close method. (Inherited from AppenderSkeleton.)
	Flush	Flushes any buffered log data. (Inherited from AppenderSkeleton.)
	GetEntryType	Get the equivalent EventLogEntryType for a Levellevel
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsAsSevereAsThreshold	Checks if the message level is below this appender's threshold. (Inherited from AppenderSkeleton.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnClose	Is called when the appender is closed. Derived classes should override this method if resources need to be released. (Inherited from AppenderSkeleton.)
	PreAppendCheck	Called before [M:Append(LoggingEvent)] as a precondition. (Inherited from AppenderSkeleton.)
	RenderLoggingEvent(LoggingEvent)	Renders the LoggingEvent to a string. (Inherited from AppenderSkeleton.)
	RenderLoggingEvent(TextWriter, LoggingEvent)	Renders the LoggingEvent to a string. (Inherited from AppenderSkeleton.)
	ToString	Returns a String that represents the current Object. (Inherited from Object.)

The appender will fail if you try to write using an event source that doesn't exist unless it is running with local administrator privileges. See also http://logging.apache.org/log4net/release/faq.html#trouble-EventLog

The EventID of the event log entry can be set using the EventID property (Properties) on the LoggingEvent.

The Category of the event log entry can be set using the Category property (Properties) on the LoggingEvent.

There is a limit of 32K characters for an event log message

When configuring the EventLogAppender a mapping can be specified to map a logging level to an event log entry type. For example:

<mapping>
  <level value="ERROR" />
  <eventLogEntryType value="Error" />
</mapping>
<mapping>
  <level value="DEBUG" />
  <eventLogEntryType value="Information" />
</mapping>

The Level is the standard log4net logging level and eventLogEntryType can be any value from the EventLogEntryType enum, i.e.:

• Error - an error event
• Warning - a warning event
• Information - an informational event

Reference