log4net 写日志到 Sql server 数据库

    本示例采用vs2010,原代码下载 /Files/zycblog/log4netDB.rar

1  新建数据库表MyLog ,脚本为

 CREATE TABLE [dbo].[Log](
2     [Id] [int] IDENTITY(1,1) NOT NULL,
3     [Date] [datetime] NOT NULL,
4     [Thread] [varchar](255) NOT NULL,
5     [Level] [varchar](50) NOT NULL,
6     [Logger] [varchar](255) NOT NULL,
7     [Message] [varchar](4000) NOT NULL,
8     [Exception] [varchar](2000) NULL
9 ) ON [PRIMARY]

 2 在项目AssemblyInfo.cs文件里新增一行

[assembly: log4net.Config.XmlConfiguratorAttribute(Watch = true)]

3 在项目config文件里新增如下节

<configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
     <log4net debug="false">
       <appender name="LogFileAppender" type="log4net.Appender.FileAppender" >
        <param name="File" value="c:\Log\DBLog.txt" />
        <param name="AppendToFile" value="true" />
        <layout type="log4net.Layout.PatternLayout">
          <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n" />
        </layout>
      </appender>
    
    <appender name="ADONetAppender" type="log4net.Appender.ADONetAppender">
      <bufferSize value="10"/>
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
      <connectionString value="server=192.168.1.100;database=ZYC;user id=sa;password=password"/>
      <commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)"/>
      <parameter>
        <parameterName value="@log_date"/>
        <dbType value="DateTime"/>
        <layout type="log4net.Layout.RawTimeStampLayout"/>
      </parameter>
      <parameter>
        <parameterName value="@thread"/>
        <dbType value="String"/>
        <size value="255"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%thread"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@log_level"/>
        <dbType value="String"/>
        <size value="50"/>
        <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="log4net.Layout.PatternLayout">
          <conversionPattern value="%message"/>
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@exception"/>
        <dbType value="String"/>
        <size value="2000"/>
        <layout type="log4net.Layout.ExceptionLayout"/>
      </parameter>
    </appender>
       <root>
         <level value="DEBUG" />
         <appender-ref ref="ADONetAppender" />
       </root>

其中

        <root>

         <level value="DEBUG" />

         <appender-ref ref="ADONetAppender" />

       </root>

节的appender-ref 是ADONetAppender，对应上面的配置是连接到数据库，俱体内容看config文件就可以知道连接串，及对应数据库表信息参数

4 测试代码为

 private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(MyLog));

      public static void LogInfo()

        {

            log.Info("log日¨?志?");

        }

    至此log信息就新增到数据库了

注意事项 

       引用log4net.dll

       引用System.Data.dll