log4net 添加自定义日志到数据库

添加操作日志到数据库举例：

（一）建立数据库的操作日志表，如下我建立了一个简单的日志表

（二）配置文件中的配置如下

  <log4net>
  <!--错误日志记录数据库-->
    <logger name="OperateDB">
      <level value="INFO"/>
      <appender-ref ref="AdoNetAppender_OperToSql" />
    </logger>
<!--操作日志记录到数据库-->
    <appender name="AdoNetAppender_OperToSql" type="log4net.Appender.AdoNetAppender">
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      <connectionString value="server=192.168.1.188\MSSQLSERVER2008;database=HotelMIS;uid=sa;pwd=123456;" />
      <commandText value="insert into OperateLog(LogLevel, Msg, ClassName, Method, Cby, Cdt)values(@LogLevel, @Msg, @ClassName, @Method, @Cby, @Cdt)" />
      <bufferSize value="1" />

      <parameter>
        <parameterName value="@LogLevel" />
        <dbType value="String" />
        <size value="64" />
        <layout type="log4net.Layout.PatternLayout" value="%level" />
      </parameter>

      <parameter>
        <parameterName value="@Msg" />
        <dbType value="String" />
        <size value="10240" />
        <layout type="Util.MyLogLayout, Util">
          <conversionPattern value="%property{Msg}" />
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@ClassName" />
        <dbType value="String" />
        <size value="256" />
        <layout type="Util.MyLogLayout, Util" >
          <param name="ConversionPattern" value="%property{ClassName}"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@Method" />
        <dbType value="String" />
        <size value="256" />
        <layout type="Util.MyLogLayout, Util" >
          <param name="ConversionPattern" value="%property{Method}"/>
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@Cby" />
        <dbType value="String" />
        <size value="128" />
        <layout type="Util.MyLogLayout, Util" >
          <param name="ConversionPattern" value="%property{Cby}"/>
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@Cdt" />
        <dbType value="DateTime" />
        <layout type="log4net.Layout.RawTimeStampLayout" />
      </parameter>
    </appender>

  </log4net>

（三）定义自己的 Layout 布局类 和 MyMessagePatternConverter类

namespace Util
{
    public class MyLogLayout : PatternLayout
    {
        public MyLogLayout()
        {
            this.AddConverter("property", typeof(MyMessagePatternConverter));
        }  

    }
}

namespace Util
{
    public class MyMessagePatternConverter : PatternLayoutConverter
    {
        protected override void Convert(System.IO.TextWriter writer, log4net.Core.LoggingEvent loggingEvent)
        {
            if (Option != null)
            {
                // Write the value for the specified key
                WriteObject(writer, loggingEvent.Repository, LookupProperty(Option, loggingEvent));
            }
            else
            {
                // Write all the key value pairs
                WriteDictionary(writer, loggingEvent.Repository, loggingEvent.GetProperties());
            }
        }
        /// <summary>
        /// 通过反射获取传入的日志对象的某个属性的值
        /// </summary>
        /// <param name="property"></param>
        /// <returns></returns>
        private object LookupProperty(string property, log4net.Core.LoggingEvent loggingEvent)
        {
            object propertyValue = string.Empty;
            PropertyInfo propertyInfo = loggingEvent.MessageObject.GetType().GetProperty(property);
            if (propertyInfo != null)
                propertyValue = propertyInfo.GetValue(loggingEvent.MessageObject, null);
            return propertyValue;
        }
    }
}

（四）最后可以调用了，我这里写了一个公共的类Log

[assembly: log4net.Config.XmlConfigurator(Watch = false)]
namespace Util
{
     public class Log
    {
    　　  #region 记录操作日志到数据库
         /// <summary>
         /// 记录操作日志到数据库
         /// </summary>
         /// <param name="user"></param>
         /// <param name="msg"></param>
         /// <param name="className"></param>
         /// <param name="method"></param>
         public static void OperateDB(string user, string msg, string className, string method)
         {
             ILog logger = LogManager.GetLogger("OperateDB");
             logger.Info(new LogContent() { Msg = msg, Cby = user, ClassName = className, Method = method });//将异常信息写到磁盘上.
         }

         /// <summary>
         /// 记录操作日志到数据库
         /// </summary>
         /// <param name="user"></param>
         /// <param name="msg"></param>
         public static void OperateDB(string user, string msg)
         {
             ILog logger = LogManager.GetLogger("OperateDB");
             logger.Info(new LogContent() { Msg = msg, Cby = user, ClassName = null, Method = null });//将异常信息写到磁盘上.
         }
         #endregion

    }

}