Access Memory Target in NLog

Question

Lets say I have the following in my nlog.config (taken from http://nlog-project.org/documentation/v2.0.1/html/T_NLog_Targets_MemoryTarget.htm):

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <targets>
         <target name="memory" xsi:type="Memory" layout="${message}" />
     </targets>

     <rules>
         <logger name="*" minlevel="Info" writeTo="memory" />
    </rules>
</nlog>

How do I access this target programatically? I am trying to display the logs in a text box.

score 10 · Accepted Answer · answered Jul 16 '15 at 21:50

10

Exactly the same issue here, this worked for me:

var target =(MemoryTarget)LogManager.Configuration.FindTargetByName("memory");
var log = string.Join("\r\n", target.Logs);
txtLog.Text = log;

answered Jul 16 '15 at 21:50

Thomas Weller

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score 4 · Answer 2 · answered May 23 '14 at 19:04

4

You can use LoggingConfiguration.FindTargetByName passing in the name of the target, then cast it to MemoryTarget, and use the Log property to get the logs gathered

answered May 23 '14 at 19:04

Xharze

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score 1 · Answer 3 · edited Nov 04 '22 at 14:38

1

You can create your own target and process log entries as need: https://github.com/NLog/NLog/wiki/How-to-write-a-custom-target

edited Nov 04 '22 at 14:38

Grault

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answered May 23 '14 at 17:51

user3636971

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Why would he need to do that when NLog has a `MemoryTarget` already written for just this purpose? – Nov 24 '15 at 14:45
1

With MemoryTarget you have to check manually/periodically for new log entries. Furthermore, maybe you have to filter leg entries which are already presented, or change the entire TextBox content, which is not very effective. With a custom target, you can notify a listener which can handle added log entries as required - append to the TextBox in that case! After all, it is just an alternative, but I do not agree with the downvote... – user3636971 Nov 27 '15 at 09:06
1

You were probably downvoted because you didn't answer the OPs very specific question. "How do I access this target programatically?" The answer isn't how to create a different kind of target. – Nov 27 '15 at 20:47

score 1 · Answer 4 · answered Jan 13 '16 at 19:59

Check here NLog manual http://nlog-project.org/documentation/v2.0.1/html/T_NLog_Targets_MemoryTarget.htm

 using System;

 using NLog;
 using NLog.Targets;

 class Example
 {
     static void Main(string[] args)
     {
        MemoryTarget target = new MemoryTarget();
        target.Layout = "${message}";
        //  target.Layout = "${longdate} ${level:uppercase=true} ${logger} ${message}";
        NLog.Config.SimpleConfigurator.ConfigureForTargetLogging(target, LogLevel.Debug);

        Logger logger = LogManager.GetLogger("Example");
        logger.Debug("log message");

        foreach (string s in target.Logs)
        {
            Console.Write("logged: {0}", s);
        }
    }
}

Access Memory Target in NLog

4 Answers4

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