log4net ADO Stored Procedure

I am trying to call an existing Stored Procedure but can't get it to log. Seems to be parameter type conversion problem, but I can't figure it out.

Error on build is:

log4net:ERROR XmlHierarchyConfigurator: Cannot find Property [conversionPattern] to set object on [log4net.Layout.RawPropertyLayout]

web.config is:

<appender name="ADONetAppender" type="log4net.Appender.ADONetAppender">
  <bufferSize value="1" />
  <threshold value="ALL"/>
  <param name="ConnectionType" value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
  <param name="ConnectionString" value="Data Source=central-db.canterbury.ac.uk\devel;Initial Catalog=SourceDB;Persist Security Info=True;/>
  <param name="UseTransactions" value="False" />
  <commandText value="dbo.usperrLogError" />
  <commandType value="StoredProcedure" />

  <parameter>
    <parameterName value="@ApplicationId"/>
    <dbType value="String"/>
    <size value="2" />
    <layout type="log4net.Layout.RawPropertyLayout">
      <key value="EventGuid" />
      <conversionPattern value="%property{APP-ID}"/>
      </layout>
  </parameter>
  //
  <parameter>
    <parameterName value="@EventGuid"/>
    <dbType value="String"/>
    <size value="50" />
    <layout type="log4net.Layout.RawPropertyLayout">
      <key value="EventGuid" />
      <conversionPattern value="%property{GUID}"/>
    </layout>
  </parameter>

Am setting Properties like this:

log4net.ThreadContext.Properties["GUID"] = eventGuid.ToString();

Following the log4net debug error there is an additional error here:

A first chance exception of type 'System.ArgumentNullException' occurred in mscorlib.dll
log4net:ERROR [AdoNetAppender] Failed in DoAppend
System.ArgumentNullException: Key cannot be null.
Parameter name: key
   at System.Collections.Hashtable.get_Item(Object key)
   at log4net.Util.PropertiesDictionary.get_Item(String key) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Util\PropertiesDictionary.cs:line 114
   at log4net.Core.LoggingEvent.LookupProperty(String key) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Core\LoggingEvent.cs:line 1404
   at log4net.Layout.RawPropertyLayout.Format(LoggingEvent loggingEvent) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Layout\RawPropertyLayout.cs:line 84
   at log4net.Appender.AdoNetAppenderParameter.FormatValue(IDbCommand command, LoggingEvent loggingEvent) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Appender\AdoNetAppender.cs:line 1117
   at log4net.Appender.AdoNetAppender.SendBuffer(IDbTransaction dbTran, LoggingEvent[] events) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Appender\AdoNetAppender.cs:line 560
   at log4net.Appender.AdoNetAppender.SendBuffer(LoggingEvent[] events) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Appender\AdoNetAppender.cs:line 501
   at log4net.Appender.BufferingAppenderSkeleton.Append(LoggingEvent loggingEvent) in c:\work\svn_root\apache\log4net\tags\log4net开发者_Python百科-1.2.10-rc2\build\package\log4net-1.2.10\src\Appender\BufferingAppenderSkeleton.cs:line 463
   at log4net.Appender.AppenderSkeleton.DoAppend(LoggingEvent loggingEvent) in c:\work\svn_root\apache\log4net\tags\log4net-1.2.10-rc2\build\package\log4net-1.2.10\src\Appender\AppenderSkeleton.cs:line 316
A first chance exception of type 'System.ArgumentNullException' occurred in mscorlib.dll
log4net:ERROR [AdoNetAppender] Failed in DoAppend
System.ArgumentNullException: Key cannot be null.

Clearly I am not using RawPropertyLayout correctly but can't find good examples!

I do something like you, but I use the log4net.Layout.PatternLayout like this:

<parameter>
  <parameterName value="@ProjectParam1"/>
  <dbType value="String"/>
  <size value="254" />
  <layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="%property{OrderNumber}" />
  </layout>
</parameter>

If I understand the log4net.Layout.RawPropertyLayout correctly, you have to use it as follows:

<parameterName value="@EventGuid"/>
   <dbType value="String"/>
   <size value="50" />
   <layout type="log4net.Layout.RawPropertyLayout">
      <param name="Key" value="GUID" />
   </layout>
</parameter>