log4net进阶手札(四)：保存自定义对象到oracle
有些时候，log4net内置的日志信息不能满足实际需要，在log4net中可以保存自定义对象，主要是通过扩展内置的两个类：PatternLayout类和PatternLayoutConverter类，再通过%obj{property}来访问自定义对象属性，具体细节如以下几个步骤，其中，本人项目需要是通过内置属性和自定义相结合来完成的。
一、确保log4net基本配置能正常运行；
二、创建自定义对象：
public class LogInfo
{
public String SID { get; set; }
public String Title { get; set; }
public String UserID { get; set; }
public String LogLevel { get; set; }
public String Logger { get; set; }
public String Detail { get; set; }
public String DateTime { get; set; }
}
三、创建两个类：XLayout类和XPatternLayoutConverter类：
namespace GXSN.Util.Logger
{
public class XLayout : PatternLayout
{
public XLayout()
{
this.AddConverter("property", typeof(XPatternLayoutConverter));
}
}
public class XPatternLayoutConverter : PatternLayoutConverter
{
protected override void Convert(System.IO.TextWriter writer, log4net.Core.LoggingEvent loggingEvent)
{
if (this.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;
propertyInfo = loggingEvent.MessageObject.GetType().GetProperty(property);
if (propertyInfo != null)
{
propertyValue = propertyInfo.GetValue(loggingEvent.MessageObject, null);
}
return propertyValue;
}
}
}
四、修改web.config文件：
<appender name="AdoNetAppenderOracle" type="log4net.Appender.AdoNetAppender">
<connectionType value="System.Data.OracleClient.OracleConnection, System.Data.OracleClient, Version=2.0.0.0, Culture=Neutral, PublicKeyToken=b77a5c561934e089" />
<connectionString value="data source=orcl;User ID=system;Password=123456" />
<commandText value="INSERT INTO TBL_Log(sid,title,userid,threadid,loglevel,logger,detail,logdate) VALUES(:sid, :title, :userid, :thread, :log_level, :logger, :message, :log_date)" />
<bufferSize value="128" />
<parameter>
<parameterName value=":sid" />
<dbType value="String" />
<size value="64" />
<layout type="GXSN.Util.Logger.XLayout, GXSN.Util.Logger">
<conversionPattern value="%property{SID}" />
</layout>
</parameter>
<parameter>
<parameterName value=":title" />
<dbType value="String" />
<size value="255" />
<layout type="GXSN.Util.Logger.XLayout, GXSN.Util.Logger">
<conversionPattern value="%property{Title}" />
</layout>
</parameter>
<parameter>
<parameterName value=":userid" />
<dbType value="String" />
<size value="255" />
<layout type="GXSN.Util.Logger.XLayout, GXSN.Util.Logger">
<conversionPattern value="%property{UserID}" />
</layout>
</parameter>
<parameter>
<parameterName value=":thread" />
<dbType value="String" />
<size value="32" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%thread" />
</layout>
</parameter>
<parameter>
<parameterName value=":log_level" />
<dbType value="String" />
<size value="64" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level" />
</layout>
</parameter>
<parameter>
<parameterName value=":logger" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%logger" />
</layout>
</parameter>
<parameter>
<parameterName value=":message" />
<dbType value="String" />
<size value="4000" />
<layout type="GXSN.Util.Logger.XLayout, GXSN.Util.Logger">
<conversionPattern value="%property{Detail}" />
</layout>
</parameter>
<parameter>
<parameterName value=":log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.RawTimeStampLayout" />
</parameter>
</appender>
五、开始测试。
参考网站：
http://logging.apache.org/log4net/release/config-examples.html