The possibly simplest custom logging configuration is a configuration that disables any logging. While we do not recommend to uses such a configuration it might be useful for debugging purposes.
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" autoReload="true">
<targets>
<target
name="NullTarget"
xsi:type="Null"
/>
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="NullTarget" />
</rules>
</nlog>
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Listing 1: Disabling all logging by defining a null target.
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target
name="WindowsEventLogInfo"
xsi:type="EventLog"
layout="REDBEX ${longdate} ${message}"
source="RedbexApplicationServer"
machineName="."
eventId="1"/>
<target name="ColoredConsole" xsi:type="ColoredConsole"/>
</targets>
<rules>
<logger name="*" minlevel="Trace" writeTo="WindowsEventLogInfo">
<filters>
<when condition="length('${message}') > 100" action="Ignore" />
<when condition="equals('${logger}','MyApps.SomeClass')" action="Ignore" />
<when condition="(level >= LogLevel.Debug and contains('${message}','PleaseDontLogThis')) or level==LogLevel.Warn" action="Ignore" />
<when condition="not starts-with('${message}','PleaseLogThis')" action="Ignore" />
</filters>
</logger>
</rules>
</nlog>
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Listing 2: A custom logging configuration that uses advanced filtering in the rules section.
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target name="logfile" xsi:type="File" fileName="c:\temp\logfile.txt" layout="${longdate} ${level:uppercase=true} ${message} ${onexception:${newline}EXCEPTION OCCURRED${newline}${exception:format=tostring}}"/>
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="logfile" />
</rules>
</nlog>
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Listing 3: A very simple logging configuration, just writing to a single file.
