Can you pull the connectionString for a log4net AdoNetAppender from elsewhere in a web.config file?

Question

I already have a db connection string in my web.config file. I scanned the log4net docs, but can't seem to find a way to use it within the log4net section of my web.config file. Is is possible to do something like this?

<connectionStrings>
    <add name="connStr" connectionString="Data Source=localhost; ..." />
</connectionStrings>

<log4net>
    <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
    <connectionString connectionStringName="connStr"/>
      ...
</log4net>

Answer 1

It is possible to use a DB connection string specified in web.config without creating a new class, though you would need to use log4net build that hasn't been released yet. It can be downloaded from SVN repository http://svn.apache.org/viewvc/logging/log4net/trunk/

Your config will look as follows:

<connectionStrings>
    <add name="connStr" connectionString="Data Source=localhost; ..." />
</connectionStrings>

<log4net>
    <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
    <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
    <connectionStringName value="connStr" />
      ...
</log4net>

Please note that connectionType still needs to be specified.