log4net保存到数据库系列一：WebConfig中配置log4net

园子里面有很多关于log4net保存到数据库的帖子,但是要动手操作还是比较不易，从头开始学习log4net数据库日志

• 一、WebConfig中配置log4net
• 二、独立配置文件中配置log4net
• 三、代码中xml配置log4net
• 四、完整代码配置log4net
• 五、新增数据库字段

下面先一点一点来学习如果进行配置

1.下载安装

• Nuget安装：

• Nuget控制台安装：

Install-Package log4net

• 官方下载最新版本：

http://logging.apache.org/log4net/download_log4net.cgi

2.创建数据库脚本

 CREATE TABLE [dbo].[Log] (
     [Id] [int] IDENTITY (1, 1) NOT NULL,
     [Date] [datetime] NOT NULL,
     [Thread] [varchar] (255) NOT NULL,
     [Level] [varchar] (50) NOT NULL,
     [Logger] [varchar] (255) NOT NULL,
     [Message] [varchar] (4000) NOT NULL,
     [Exception] [varchar] (2000) NULL
 )

数据库脚本

3.配置文件

WebConfig的configSections节点增加

<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />

<log4net>
    <!--注册Appender-->
    <root>
      <level value="ALL" />
      <appender-ref ref="AdoNetAppender" />
    </root>
    <!--配置Appender-->
    <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
      <bufferSize value="-1" />
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      <connectionString value="data source=[服务器地址];initial catalog=[数据库];persist security info=True;user id=[账号];password=[密码];MultipleActiveResultSets=True;" />
      <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>
  </log4net>

WebConfig中配置log4net节点

4.设置监控

AssemblyInfo.cs中增加代码

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

5.测试代码

ILog log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
log.Error("Error是错误", new Exception("错误"));
log.Fatal("Fatal是严重错误", new Exception("致命错误"));
log.Info("Info是普通消息");
log.Debug("Debug是调试消息");

6.测试成功