在其他地方读取Log4net的数据库连接

好多时候，在lognet中再写一次连接都是重复的，通过下面的方法可以读取在配置文件其它位置声明的数据库连接

using System;
using log4net;
using log4net.Config;
using System.Configuration;
using System.Collections.Specialized;
using System.IO;
namespace EtpService.Core
{
    /**//// <summary>
    /// Log4net 的摘要说明。
    /// </summary>
    public sealed class Log4net
       {
        //public static readonly ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); 
        //public static readonly ILog log = LogManager.GetLogger("EtpService.Core.AccountManager");
        
        
        public Log4net()
        {
            
        }
        
        /**//// <summary>
        /// 不好不知道怎么封装
        /// </summary>
        /// <param name="loggerName"></param>
        /// <returns></returns>
        public ILog GetLog(string loggerName)
        {
            ILog log = LogManager.GetLogger(loggerName);    
            return log;
        }

        /**//// <summary>
        /// 初始化Log4net的配置文件，最好在程序开始时只运行一次
        /// </summary>
        /// <param name="fileName">配置文件名：</param>
        public static void Config(string fileName)
        {
            DOMConfigurator.Configure(new FileInfo(fileName));
        }

        /**//// <summary>
        /// 通过Section和索引取得配置中的值
        /// </summary>
        /// <param name="section"></param>
        /// <param name="index"></param>
        /// <returns></returns>
        public static string GetConfig(string section,int index)
        {
            NameValueCollection nameValueCollection = new NameValueCollection();
            nameValueCollection = (NameValueCollection)ConfigurationSettings.GetConfig(section);
            return nameValueCollection[index];
        }
        
        
        /**//// <summary>
        /// 配置连接字符串
        /// </summary>
        /// <param name="conString"></param>
        /// <param name="loggerName"></param>
        /// <param name="appenderName"></param>
        public static void ConfigConnection(string conString,string loggerName,string appenderName)
        {
            
            try
            {  
                 log4net.Repository.Hierarchy.Hierarchy h = LogManager.GetLoggerRepository() as log4net.Repository.Hierarchy.Hierarchy;  
                if(h != null)
                {                    
                    log4net.Appender.AdoNetAppender adoAppender = (log4net.Appender.AdoNetAppender)h.GetLogger(loggerName,            
                        h.LoggerFactory).GetAppender(appenderName);
                    if(adoAppender !=null)
                    {
                        adoAppender.ConnectionString = conString;  
                        adoAppender.ActivateOptions();
                    }
                }
                
            }
            catch(NullReferenceException nfe) 
            {  
                throw new NullReferenceException("配置文件可能有错误", nfe);  
            } 

        }
    
    }
}

调用代码：

private static readonly ILog log = LogManager.GetLogger(typeof(AccountManager));
string conString = Log4net.GetConfig("nhibernate",3);
            Log4net.ConfigConnection(conString,"EtpService.Core.AccountManager","ADONetAppender");
没有用上面的类生成Log，不知道怎么实现 类似static readonly 的功能

配置文件：

<configSections>
        <section name="nhibernate" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089" />
        <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
        <section name="etp" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089" />
    </configSections>
<nhibernate>
        <add key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider" />
        <add key="hibernate.dialect" value="NHibernate.Dialect.MsSql2000Dialect" />
        <add key="hibernate.connection.driver_class" value="NHibernate.Driver.SqlClientDriver" />
        <add key="hibernate.connection.connection_string" value="Password=sa;uid=sa;Initial Catalog=Etp;Data Source=dinghao" />
    </nhibernate>