Log4net 自定义字段 写入Oracle 使用ODP.NET Managed驱动

一、环境说明：

开发工具：vs2010 ，数据库：oracle 11g ，版本：log4net的目前最新版本1.2.13.0 ； Oracle.ManagedDataaccess.dll Version 4.121.1.0

二、官网dll准备

log4net http://mirrors.hust.edu.cn/apache//logging/log4net/binaries/log4net-1.2.13-bin-newkey.zip

Oracle.ManagedDataAccess.dll 官网http://www.oracle.com/technetwork/topics/dotnet/downloads/index.html

三、实现步骤(以个人建立的项目为例子解说)

1、建立项目log4netTest5,把dll放在Lib文件内， 打开项目 引用 把dll 引入项目

2、建立log4net.config 配置文件(周公等网上的达人都详解的很清楚了，我就讲解oracle哪一部分)

注意： <appender name="AdoNetAppender_ORCL" type="log4net.Appender.OracleAppender">数据驱动

<connectionType value="Oracle.ManagedDataAccess.Client.OracleConnection,Oracle.ManagedDataAccess, Version=4.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />数据库连接串

 <connectionString value="Data Source=//localhost:1521/orcl;User ID=user;PassWord=user;" />还有

 <commandText value="insert into SECURITY_LOG4NET 按照自己的实际情况自己修改

<?xml version="1.0" encoding="utf-8" ?><configuration>  <configSections>    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />  </configSections>  <log4net>    <appender name="AdoNetAppender_ORCL" type="log4net.Appender.OracleAppender">      <bufferSize value="1"/>      <connectionType value="Oracle.ManagedDataAccess.Client.OracleConnection,Oracle.ManagedDataAccess, Version=4.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />      <connectionString value="Data Source=//localhost:1521/orcl;User ID=user;Password=user;" />      <commandText value="insert into SECURITY_LOG4NET (LOG_DATE,LOG_LEVEL,LOG_MESSAGE,LOG_EXCEPTION,LOG_LOGGER,LOG_SOURCE,USERID,LOGTYPE)  VALUES (:log_date, :log_level,:log_message, :log_exception, :logger, :source,:USERID,:LOGTYPE)"/>      <parameter>        <parameterName value=":log_date" />        <dbType value="DateTime" />        <layout type="log4net.Layout.RawTimeStampLayout">          <conversionPattern value="%d{yyyy/MM/dd HH:mm:ss}" />        </layout>      </parameter>      <parameter>        <parameterName value=":log_level" />        <dbType value="String" />        <size value="10" />        <layout type="log4net.Layout.PatternLayout">          <conversionPattern value="%level" />        </layout>      </parameter>      <parameter>        <parameterName value=":log_message" />        <dbType value="String" />        <size value="4000" />        <layout type="log4net.Layout.PatternLayout">          <conversionPattern value="%m" />        </layout>      </parameter>      <parameter>        <parameterName value=":log_exception" />        <dbType value="String" />        <size value="4000" />        <layout type="log4net.Layout.PatternLayout">          <conversionPattern value="%exception" />        </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=":source" />        <dbType value="String" />        <size value="1000" />        <layout type="log4net.Layout.PatternLayout">          <conversionPattern value="%file:%line" />        </layout>      </parameter>      <parameter>        <parameterName value=":USERID" />        <dbType value="String" />        <size value="100" />        <layout type="Log4NetToDatabase.CustomLayout">          <conversionPattern value="%USERID" />        </layout>      </parameter>      <parameter>        <parameterName value=":LOGTYPE" />        <dbType value="String" />        <size value="100" />        <layout type="Log4NetToDatabase.CustomLayout">          <conversionPattern value="%LOGTYPE" />        </layout>      </parameter>    </appender>    <root>      <level value ="ALL"/>      <appender-ref ref="AdoNetAppender_ORCL"/>    </root>     </log4net></configuration>

　　3、自己实现OracleAppender.cs 和OracleAppenderParameter.cs

（我直接取自http://www.VEVb.com/hnsongbiao/p/4216147.html#commentform）

  1 public class OracleAppender : BufferingAppenderSkeleton  2     {  3         // Fields  4         PRivate static readonly Type declaringType = typeof(AdoNetAppender);  5         private string m_commandText;  6         private CommandType m_commandType = CommandType.Text;  7         private string m_connectionString;  8         private string m_connectionType;  9         private OracleCommand m_dbCommand; 10         private OracleConnection m_dbConnection; 11         protected ArrayList m_parameters = new ArrayList(); 12         private bool m_reconnectOnError = false; 13         private SecurityContext m_securityContext; 14         protected bool m_usePreparedCommand; 15         private bool m_useTransactions = true; 16  17         // Methods 18         public override void ActivateOptions() 19         { 20             base.ActivateOptions(); 21             this.m_usePreparedCommand = (this.m_commandText != null) && (this.m_commandText.Length > 0); 22             if (this.m_securityContext == null) 23             { 24                 this.m_securityContext = SecurityContextProvider.DefaultProvider.CreateSecurityContext(this); 25             } 26             this.InitializeDatabaseConnection(); 27             this.InitializeDatabaseCommand(); 28         } 29  30         public void AddParameter(OracleAppenderParameter parameter) 31         { 32             this.m_parameters.Add(parameter); 33         } 34  35         protected virtual string GetLogStatement(LoggingEvent logEvent) 36         { 37             if (this.Layout == null) 38             { 39                 this.ErrorHandler.Error("ADOAppender: No Layout specified."); 40                 return ""; 41             } 42             StringWriter writer = new StringWriter(CultureInfo.InvariantCulture); 43             this.Layout.Format(writer, logEvent); 44             return writer.ToString(); 45         } 46  47         private void InitializeDatabaseCommand() 48         { 49             if ((this.m_dbConnection != null) && this.m_usePreparedCommand) 50             { 51                 try 52                 { 53                     this.m_dbCommand = this.m_dbConnection.CreateCommand(); 54                     this.m_dbCommand.CommandText = this.m_commandText; 55                     this.m_dbCommand.CommandType = this.m_commandType; 56                 } 57                 catch (Exception exception) 58                 { 59                     this.ErrorHandler.Error("Could not create database command [" + this.m_commandText + "]", exception); 60                     if (this.m_dbCommand != null) 61                     { 62                         try 63                         { 64                             this.m_dbCommand.Dispose(); 65                         } 66                         catch 67                         { 68                         } 69                         this.m_dbCommand = null; 70