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https://issues.apache.org/jira/browse/LOG4NET-453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336185#comment-14336185
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Dominik Psenner commented on LOG4NET-453:
-----------------------------------------
The quick solution is to use the ConsoleAppender instead. You could try to
build log4net from source and modify this line:
System.Text.Encoding consoleEncoding =
System.Text.Encoding.GetEncoding(GetConsoleOutputCP());
to be:
System.Text.Encoding consoleEncoding = Console.OutputEncoding;
Unfortunately I have no possibility to test this with Mono 3.x on a Linux box,
but if this works for you we might have a patch that works. However, I'm not so
confident this could work because of the .NET Core Notes mentioned here:
https://msdn.microsoft.com/en-us/library/system.console%28v=vs.110%29.aspx
It might be that Console.OutputEncoding returns UTF8 most of the times as a
general rule of behaviour and thus neglects the existence of codepages and
outputting colored characters might depend on the exact knowledge of the
codepage. But again, this is all very speculative.
> log4net.Appender.ColoredConsoleAppender Fail Under Mono
> -------------------------------------------------------
>
> Key: LOG4NET-453
> URL: https://issues.apache.org/jira/browse/LOG4NET-453
> Project: Log4net
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 1.2.11
> Environment: Mono 3.x under Linux Centos/Debian/Ubuntu
> Reporter: Syeh Abidin
>
> I am trying to use log4net.Appender.ColoredConsoleAppender
> under mono, but seem failed with message :
> log4net:ERROR Could not create Appender [A1] of type
> [log4net.Appender.ColoredConsoleAppender]. Reported error follows.
> System.EntryPointNotFoundException: GetConsoleOutputCP
> at (wrapper managed-to-native)
> log4net.Appender.ColoredConsoleAppender:GetConsoleOutputCP ()
> at log4net.Appender.ColoredConsoleAppender.ActivateOptions () [0x00000] in
> <filename unknown>:0
> at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender
> (System.Xml.XmlElement appenderElement) [0x00000] in <filename unknown>:0
> it seem bug issue,
> the log4net.xml is simple:
> <appender name="A1" type="log4net.Appender.ColoredConsoleAppender">
> <layout type="log4net.Layout.PatternLayout">
> <conversionPattern value="%date [%thread] %-5level %logger %ndc -
> %message%newline" />
> </layout>
> <mapping>
> <level value="INFO" />
> <foreColor value="White, HighIntensity" />
> <backColor value="Green" />
> </mapping>
> <mapping>
> <level value="DEBUG" />
> <foreColor value="White, HighIntensity" />
> <backColor value="Blue" />
> </mapping>
> <mapping>
> <level value="WARN" />
> <foreColor value="Yellow, HighIntensity" />
> <backColor value="Purple" />
> </mapping>
> <mapping>
> <level value="ERROR" />
> <foreColor value="Yellow, HighIntensity" />
> <backColor value="Red" />
> </mapping>
> </appender>
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