NLog - Documentation

Last updated: 2006-09-18

This website is based on NLog v1.0. Click here to view the documentation for other versions.

Null Target

Discards logging messages optionally forcing the layouts to be calculated. Used mainly for debugging and benchmarking.

Assembly	Class	.NET Framework			.NET CF		Mono on Windows		Mono on Unix
Assembly	Class	1.0	1.1	2.0	1.0	2.0	1.0	2.0	1.0	2.0
NLog.dll	NLog.Targets.NullTarget

Parameters (blue fields are required):

Name Type Description

layout

string ${}

The text to be rendered.

Default value is: ${longdate}|${level:uppercase=true}|${logger}|${message}.

name

string

The name of the target.

formatMessage

boolean

Perform layout calculation.

Default value is: False.

Example:

To set up the target in the configuration file, use the following syntax:

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" 
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 
  <targets> 
    <target name="n" xsi:type="Null" layout="${message}" formatMessage="true"/> 
  </targets> 
  <rules> 
    <logger name="*" minlevel="Debug" writeTo="n"/> 
  </rules> 
</nlog>

This assumes just one target and a single rule. More configuration options are described here.

To set up the log target programmatically use code like this:

using System; 
 
using NLog; 
using NLog.Targets; 
 
class Example 
{ 
    static void Main(string[] args) 
    { 
        NullTarget target = new NullTarget(); 
        target.Layout = "${message}"; 
        target.FormatMessage = true; 
 
        NLog.Config.SimpleConfigurator.ConfigureForTargetLogging(target, LogLevel.Debug); 
 
        Logger logger = LogManager.GetLogger("Example"); 
        logger.Debug("log message"); 
    } 
}

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