Custom FileTarget NLog

Question

Custom FileTarget NLog

I created a custom NLogViewerTarget ( NLogViewerEx ) for Sentinel as follows: stack overflow

Now I also want to have a formatted message for my FileTarget , but when I use it, it no longer works (logs).

 <targets async="true"> <target xsi:type="FileTargetEx" name="file" layout="${longdate} - ${level:uppercase=true}: ${message}${onexception:${newline}exception\: ${exception:format=tostring}}" filename="${specialfolder:folder=commonapplicationdata}/company gmbh/${appname}/logs/${appname}.log" keepfileopen="false" archivefilename="${specialfolder:folder=commonapplicationdata}/company gmbh/${appname}/logs/${appname}_archive.{##}.zip" archivenumbering="dateandsequence" archiveevery="day" maxarchivefiles="50" archivedateformat="yyyy-mm-dd" archiveoldfileonstartup="true" createdirs="true" enablearchivefilecompression="true" encoding="utf-8" header="############################################## ${appname} log ##############################################" archiveabovesize="10485760"/> <target xsi:type="NLogViewerEx" name="sentinel" address="udp://127.0.0.1:9999"/> </targets>

I also tried to create a custom FileTarget , but this also does not work. Does anyone have a solution, how to apply it?

 [Target("FileTargetEx")] internal class FileTargetEx : FileTarget { private readonly Log4JXmlEventLayoutEx _Layout = new Log4JXmlEventLayoutEx(); public override Layout Layout { get { return _Layout; } set { } } }

I gave File Target xsi:type FileTargetEx and xsi:type NLogViewerEx without any success. If I do, Sentinel and File are no longer registered!

Debugging

After turning on the internal debug log, I get the following log:

 2017-12-13 09:32:52.6572 Info Loading assembly: HtCore 2017-12-13 09:32:52.6834 Debug ScanAssembly('NLog, Version=5.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c') 2017-12-13 09:32:52.7356 Debug Start auto loading, location: D:\Repositories\gitlab.company\dotNet\HtCore\HtCore\TestConsole\bin\Debug 2017-12-13 09:32:52.7356 Debug Auto loading done 2017-12-13 09:32:52.7496 Debug ScanAssembly('HtCore, Version=1.4.0.8, Culture=neutral, PublicKeyToken=null') 2017-12-13 09:32:52.7797 Debug Setting 'UppercaseLayoutRendererWrapper.uppercase' to 'true' 2017-12-13 09:32:52.7797 Debug Setting 'FileTargetEx.name' to 'file' 2017-12-13 09:32:52.7978 Debug Setting 'FileTargetEx.filename' to '${specialfolder:folder=commonapplicationdata}/company gmbh/Testconsole/logs/Testconsole.log' 2017-12-13 09:32:52.7978 Debug Setting 'SpecialFolderLayoutRenderer.folder' to 'commonapplicationdata' 2017-12-13 09:32:52.8108 Debug Setting 'FileTargetEx.keepfileopen' to 'false' 2017-12-13 09:32:52.8108 Debug Setting 'FileTargetEx.archivefilename' to '${specialfolder:folder=commonapplicationdata}/company gmbh/Testconsole/logs/Testconsole_archive.{##}.zip' 2017-12-13 09:32:52.8108 Debug Setting 'SpecialFolderLayoutRenderer.folder' to 'commonapplicationdata' 2017-12-13 09:32:52.8278 Debug Setting 'FileTargetEx.archivenumbering' to 'dateandsequence' 2017-12-13 09:32:52.8278 Debug Setting 'FileTargetEx.archiveevery' to 'day' 2017-12-13 09:32:52.8429 Debug Setting 'FileTargetEx.maxarchivefiles' to '50' 2017-12-13 09:32:52.8429 Debug Setting 'FileTargetEx.archivedateformat' to 'yyyy-mm-dd' 2017-12-13 09:32:52.8429 Debug Setting 'FileTargetEx.archiveoldfileonstartup' to 'true' 2017-12-13 09:32:52.8634 Debug Setting 'FileTargetEx.createdirs' to 'true' 2017-12-13 09:32:52.8634 Debug Setting 'FileTargetEx.enablearchivefilecompression' to 'true' 2017-12-13 09:32:52.8758 Debug Setting 'FileTargetEx.encoding' to 'utf-8' 2017-12-13 09:32:52.8758 Debug Setting 'FileTargetEx.header' to '############################################## Testconsole log ##############################################' 2017-12-13 09:32:52.8968 Warn Error when setting '############################################## ${appname} log ##############################################' on attibute 'header' 2017-12-13 09:32:52.9028 Error Parsing configuration from D:\Repositories\gitlab.company\dotNet\HtCore\HtCore\TestConsole\bin\Debug\NLog.config failed. Exception: NLog.NLogConfigurationException: Exception when parsing D:\Repositories\gitlab.company\dotNet\HtCore\HtCore\TestConsole\bin\Debug\NLog.config. ---> NLog.NLogConfigurationException: Error when setting property 'Header' on FileTargetEx Target[file] ---> System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt. bei NLog.Targets.TargetWithLayoutHeaderAndFooter.set_Header(Layout value) --- Ende der internen Ausnahmestapelüberwachung --- bei NLog.Internal.PropertyHelper.SetPropertyFromString(Object obj, String propertyName, String value, ConfigurationItemFactory configurationItemFactory) bei NLog.Config.XmlLoggingConfiguration.ConfigureObjectFromAttributes(Object targetObject, NLogXmlElement element, Boolean ignoreType) bei NLog.Config.XmlLoggingConfiguration.ParseTargetElement(Target target, NLogXmlElement targetElement, Dictionary`2 typeNameToDefaultTargetParameters) bei NLog.Config.XmlLoggingConfiguration.ParseTargetsElement(NLogXmlElement targetsElement) bei NLog.Config.XmlLoggingConfiguration.ParseNLogElement(NLogXmlElement nlogElement, String filePath, Boolean autoReloadDefault) bei NLog.Config.XmlLoggingConfiguration.ParseTopLevel(NLogXmlElement content, String filePath, Boolean autoReloadDefault) bei NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors) --- Ende der internen Ausnahmestapelüberwachung --- 2017-12-13 09:32:52.9028 Debug --- NLog configuration dump ---

Nlog.conf

 <?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" xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd" autoReload="true" internalLogFile="c:\log.txt" internalLogLevel="Debug"> <extensions> <add assembly="HtCore"/> </extensions> <variable name="appname" value="Testconsole" /> <targets async="true"> <target xsi:type="FileTargetEx" name="file" filename="${specialfolder:folder=commonapplicationdata}/company gmbh/${appname}/logs/${appname}.log" keepfileopen="false" archivefilename="${specialfolder:folder=commonapplicationdata}/company gmbh/${appname}/logs/${appname}_archive.{##}.zip" archivenumbering="dateandsequence" archiveevery="day" maxarchivefiles="50" archivedateformat="yyyy-mm-dd" archiveoldfileonstartup="true" createdirs="true" enablearchivefilecompression="true" encoding="utf-8" header="############################################## ${appname} log ##############################################" archiveabovesize="10485760"/> <target xsi:type="NLogViewerEx" name="sentinel" address="udp://127.0.0.1:9999"/> </targets> <rules> <logger name="*" writeTo="file" minlevel="Info"/> <logger name="*" writeTo="sentinel" minlevel="Info"/> </rules> </nlog>

C # class

 [Target("FileTargetEx")] internal class FileTargetEx : NLog.Targets.FileTarget { private readonly FileLayout _Layout = new FileLayout(); public override Layout Layout { get { return _Layout; } set { } } } internal class FileLayout : NLog.Layouts.SimpleLayout { }

I always get the same error. It doesn't matter if I set FileLayout as a Layout or my other Layout that I use with Sentinel .

When uncommenting the Layout override , then it loads NLog.conf ..

0

c # nlog sentinel

Dominic jonas Dec 11 '17 at 13:12

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1 answer

Dominic jonas · Accepted Answer · 2017-12-13T12:16:26+0000

Working solution

If there is a better solution let me know!

 /// <summary> /// is using the <see cref="FileLayoutEx"/> class. /// </summary> [Target("FileTargetEx")] internal class FileTargetEx : FileTarget { public override Layout Layout { get => _Layout; set { base.Layout = new FileLayoutEx((value as SimpleLayout).OriginalText); _Layout = new FileLayoutEx((value as SimpleLayout).OriginalText); } } private Layout _Layout; public FileTargetEx() { Footer = new FileLayoutEx(); Header = new FileLayoutEx(); } } /// <summary> /// Provides a formated message (Exception included!). /// </summary> [Layout("FileLayoutEx")] internal class FileLayoutEx : SimpleLayout { public FileLayoutEx() { } public FileLayoutEx(string originalText) : base(originalText) { } protected override string GetFormattedMessage(LogEventInfo logEvent) { //Extension method is outsourced LogEventInfo updatedInfo = logEvent.GetFormattedMessage(); return base.GetFormattedMessage(updatedInfo); } }

NLog.conf Target

 <target xsi:type="FileTargetEx" name="file" filename="${specialfolder:folder=commonapplicationdata}/company gmbh/${appname}/logs/${appname}.log" keepfileopen="false" archivefilename="${specialfolder:folder=commonapplicationdata}/company gmbh/${appname}/logs/${appname}_archive.{##}.zip" archivenumbering="dateandsequence" archiveevery="day" maxarchivefiles="50" archivedateformat="yyyy-mm-dd" archiveoldfileonstartup="true" createdirs="true" enablearchivefilecompression="true" encoding="utf-8" header="############################################## ${appname} log ##############################################" layout="${longdate}|${level:uppercase=true}|${logger}|${message}" archiveabovesize="10485760"/>

Custom FileTarget NLog

Debugging

Nlog.conf

C # class

Working solution

NLog.conf Target

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