This had me stumped for a while. My initial thought was to subclass
FileAppender or RollingFileAppender and override ActivateOptions. You can't do
that because the error happens during the XML configuration processing. What
you need to do is write a PatternString to Boolean adapter for the XML
processor:
public class PatternStringToBooleanAdapter : IConvertTo
{
public string ConversionPattern { get; set; }
public bool CanConvertTo(Type targetType)
{
return targetType == typeof(bool);
}
public object ConvertTo(object source, Type targetType)
{
var patternStringToBooleanAdapter =
(PatternStringToBooleanAdapter)source;
var patternString = new
PatternString(patternStringToBooleanAdapter.ConversionPattern);
string value = patternString.Format();
return OptionConverter.ToBoolean(value, false);
}
}
Register it before you process the xml file:
ConverterRegistry.AddConverter(typeof(PatternStringToBooleanAdapter), new
PatternStringToBooleanAdapter());
GlobalContext.Properties["AppendToFile"] = true;
log4net.Config.XmlConfigurator.Configure();
Then tell the XML processor that you want to intercept the normal property
setting with your adapter:
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="log.txt" />
<appendToFile type="ConsoleApplication1.PatternStringToBooleanAdapter,
ConsoleApplication1">
<conversionPattern value="%property{AppendToFile}" />
</appendToFile>
<layout type="log4net.Layout.SimpleLayout" />
</appender>
________________________________
From: Richard Fouts <rfo...@we-are-it.com>
To: log4net-user@logging.apache.org; log4net-...@logging.apache.org
Sent: Friday, June 5, 2009 11:01:18 AM
Subject: How do I use dynamic boolean values on RollingFileAppender
I have ran into a "small" brick wall.
Hoping that I can find a couple of log4net guru's here. My
situation.
In trying to make my logging as configurable as possible in
my application, I have been tinkering with trying to set the boolean values for
appendToFile and staticLogFileName as dynamic values. These have a
default value (currently stored in the My.Settings metadata). My problem
is that when I go to configure the values at runtime I get this error in my
stack trace:
log4net:ERROR XmlHierarchyConfigurator: Could not
create Appender [SyncLogFile] of type [log4net.Appender.RollingFileAppender].
Reported error follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[SyncLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [ErrLogFile] of type [log4net.Appender.FileAppender]. Reported error
follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[ErrLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [SyncLogFile] of type [log4net.Appender.RollingFileAppender]. Reported
error follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[SyncLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [ErrLogFile] of type [log4net.Appender.FileAppender]. Reported error
follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[ErrLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [SyncLogFile] of type [log4net.Appender.RollingFileAppender]. Reported
error follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[SyncLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [ErrLogFile] of type [log4net.Appender.FileAppender]. Reported error
follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[ErrLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [SyncLogFile] of type [log4net.Appender.RollingFileAppender]. Reported
error follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[SyncLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [ErrLogFile] of type [log4net.Appender.FileAppender]. Reported error
follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[ErrLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [SyncLogFile] of type [log4net.Appender.RollingFileAppender]. Reported
error follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[SyncLogFile] not found.
log4net:ERROR XmlHierarchyConfigurator: Could not create
Appender [ErrLogFile] of type [log4net.Appender.FileAppender]. Reported error
follows.
System.FormatException: String was not recognized as a valid
Boolean.
at System.Boolean.Parse(String value)
at log4net.Util.TypeConverters.BooleanConverter.ConvertFrom(Object
source)
at log4net.Util.OptionConverter.ConvertStringTo(Type
target, String txt)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ConvertStringTo(Type
type, String value)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.SetParameter(XmlElement
element, Object target)
at
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement
appenderElement)
log4net:ERROR XmlHierarchyConfigurator: Appender named
[ErrLogFile] not found.
The way that I am configuring the values is by trying to use
the code displayed here:
'In Main
Private Shared Log As ILog
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'[...]
primeLogging()
configLog4Net()
Log =
LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType)
Log.Info("This is the start of the application.")
End Sub
Private Sub primeLogging()
If Not My.Settings.LogPath = "" Then
_LogPath = My.Settings.LogPath
Else
_LogPath = My.Application.Info.DirectoryPath &
"\Logs\"
End If
'[...]
_MaxRollBacks = My.Settings.MaxRollBacks
_MaxFileSize = My.Settings.MaxFileSize
_isAppendToFile = My.Settings.isAppendToFile
_isStaticLogFile = My.Settings.isStaticLogFile
End Sub
Private Sub configLog4Net()
log4net.GlobalContext.Properties("LogPath") = _LogPath
log4net.GlobalContext.Properties("LogName") = _LogName
log4net.GlobalContext.Properties("RollStyle") = _tempRollStyle
log4net.GlobalContext.Properties("MaxRollBacks") =
_MaxRollBacks
log4net.GlobalContext.Properties("MaxFileSize") = _MaxFileSize
log4net.GlobalContext.Properties("isAppendToFile") =
_isAppendToFile
log4net.GlobalContext.Properties("isStaticLogFile") =
_isStaticLogFile
'My attempts to cast as a boolean (did not work)
'log4net.Util.OptionConverter.ToBoolean(log4net.GlobalContext.Properties("isAppendToFile"),
_isAppendToFile)
'log4net.Util.OptionConverter.ToBoolean(log4net.GlobalContext.Properties("isStaticLogFile"),
_isStaticLogFile)
End Sub
'In Log4Net.config (using a seperate configuration file for Log4Net)
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="log4net"
type="System.Configuration.IgnoreSectionHandler" />
</configSections>
<appSettings>
<!-- To enable internal log4net logging specify the following
appSettings key -->
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
<!-- This section contains the log4net configuration settings -->
<log4net>
<!-- Define some output appenders -->
<appender name="SyncLogFile"
type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString"
value="%property{LogPath}\Syncronizations\%property{LogName}" />
<param name="DatePattern" value=".yyyy-MM-dd-tt.log"/>
<appendToFile value="%property{isAppendToFile}" />
<maxSizeRollBackups type="log4net.Util.PatternString"
value="%property{MaxRollBacks}" />
<maximumFileSize type="log4net.Util.PatternString"
value="%property{MaxFileSize}" />
<rollingStyle type="log4net.Util.PatternString"
value="%property{RollStyle}" />
<staticLogFileName value="%property{isStaticLogFile}"
/>
<layout type="log4net.Layout.PatternLayout">
<header type="log4net.Util.PatternString"
value="**************************************** Logging Started - %date
****************************************** " />
<footer type="log4net.Util.PatternString"
value="**************************************** Logging Ended - %date
****************************************** " />
<conversionPattern value="%date [%thread]
%-5level %logger [%ndc] - %message%newline" />
</layout>
</appender>
<appender name="ErrLogFile"
type="log4net.Appender.FileAppender">
<file type="log4net.Util.PatternString"
value="%property{LogPath}\Errors\errLog.txt" />
<sppendToFile value="%property{isAppendToFile}" />
<layout type="log4net.Layout.PatternLayout">
<header type="log4net.Util.PatternString"
value="**************************************** Logging Started - %date
****************************************** " />
<footer type="log4net.Util.PatternString"
value="**************************************** Logging Ended - %date
****************************************** " />
<conversionPattern value="%date [%thread]
%-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
<appender name="ConsoleLog"
type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread]
%-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
<appender name="EventLog"
type="log4net.Appender.EventLogAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread]
%-5level %logger [%ndc] <%property{auth}> - %message%newline" />
</layout>
</appender>
<!-- Setup the root category, add the appenders and set the
default level -->
<root>
<level value="ALL" />
<appender-ref ref="SyncLogFile" />
<appender-ref ref="ErrLogFile" />
<appender-ref ref="ConsoleLog" />
<appender-ref ref="EventLog" />
</root>
</log4net>
</configuration>
All of my other appenders work (ConsoleLog, EventLog and
ErrLogFile (when I remove the appendToFile paramter).
Please any assistance would be most appreciated.
Thanks,
-saige-
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