Hi Dave,
would you please send us a the complete log4net internal logs including
debug logs?
Anyway it smells like an issue with incompatible binaries. You could
check if both the log4net assembly that your custom appender was linked
against and the log4net assembly that your application was linked
against are the same. There is a log4net assembly with strong name out
there and one that has no strong name. Or you may have even linked your
appender against a log4net assembly that you have built from source?
Cheers
On 2016-11-04 09:15, DaveS wrote:
I have created a custom appender to work alongside two other appenders. The
problem I have having is that the custom appender isn't receiving any logs.
My custom appender simply inherits from AppenderSkeleton. However, I have
also tried creating my own appender that implements IAppender.
My application is a Windows Form application, written in C# using VS2015. I
am targetting .Net 4.5.2. "Any CPU"
I am using Log4Net version v2.0.5 from NuGet (version 1.2.15.0)
Within the application config I have
<root>
<level value="DEBUG" />
<appender-ref ref="MemoryAppender" />
<appender-ref ref="RollingFileAppender" />
<appender-ref ref="AdoNetAppender" />
</root>
<appender name="MemoryAppender"
type="[namespace].CustomAppender,[assemblyname]">
</appender>
My custom appender is being found as the program stops at a break point in
the constructor. However, the overridden Append() is never called.
The OUTPUT window contains the following details:
Exception thrown: 'System.InvalidCastException' in log4net.dll
log4net:ERROR XmlHierarchyConfigurator: Could not create Appender
[MemoryAppender] of type [<namespace>.CustomAppender,<assemblyname>].
Reported error follows.
System.InvalidCastException: Unable to cast object of type
'<assemblyname>.CustomAppender' to type 'log4net.Appender.IAppender'.
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named [MemoryAppender] not
found.
Any suggestions to fix this issue would be gratefully received.
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