asp.net mvc中加入log4net记录错误日志

首先添加加log4net的dll,推荐用nuget....

贴上配置文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4Net" />
  </configSections>
  <!--日志的配置开始-->
  <log4net debug="true">
    <root>
      <level value="ALL" />
      <appender-ref ref="SysAppender" />
      <appender-ref ref="AdoNetAppender" />
    </root>

    <logger name="WebLogger">
      <!--配置日志的级别，低于此级别的就不写到日志里面去-->
      <level value="DEBUG" />
    </logger>

    <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net">
      <param name="File" value="App_Data/" />
      <param name="AppendToFile" value="true" />
      <param name="RollingStyle" value="Date" />
      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.htm&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="&lt;HR COLOR=red&gt;%n异常时间：%d [%t] &lt;BR&gt;%n异常级别：%-5p &lt;BR&gt;%n异 常 类：%c [%x] &lt;BR&gt;%n%m &lt;BR&gt;%n &lt;HR Size=1&gt;" />
        <!--<conversionPattern value="%newline %n记录时间：%date %newline %n 线程ID:[%thread] %n日志级别：  %-5level %n跟踪描述：%message%newline %n"/>-->
      </layout>
    </appender>
    <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
      <bufferSize value="1" />
      <connectionType value="MySql.Data.MySqlClient.MySqlConnection, MySql.Data, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
      <connectionString value="server=localhost;port=3306;database=jianzheng;uid=root;pwd=svse;" />
      <commandText value="INSERT INTO `TestSysLog` (`Date`, `Thread`, `Level`, `Logger`, `Method`, `Location`,`Message`, `Exception`) VALUES (@Date, @Thread, @Level, @Logger, @Method,@Location,@Message, @Exception)" />
      <parameter>
        <parameterName value="@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="@Level" />
        <dbType value="String" />
        <size value="255" />
        <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="@Method" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%method" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@Location" />
        <dbType value="String" />
        <size value="1023" />
        <layout type="log4net.Layout.PatternLayout" >
          <conversionPattern value="%location" />
        </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="8000" />
        <layout type="log4net.Layout.ExceptionLayout" />
      </parameter>
    </appender>
  </log4net>
  <!--日志的配置结束-->

</configuration>本demo里是新建的一个xml文件。在网站根目录新建如图：把xml配置内容copy进去，在Global.asax的Application_Start()中加入下面的一句 //读取日志  如果使用log4net,应用程序一开始的时候，都要进行初始化配置 log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo("config\\log4net.config"));在AssemblyInfo.cs里加入[assembly: log4net.Config.XmlConfigurator(ConfigFile = "Config\\log4net.config", Watch = false)]

AssemblyInfo.cs的位置在如图：

然后添加一个过滤器

 public class MyExceptionFileAttribute : HandleErrorAttribute
    {
        public override void OnException(ExceptionContext filterContext)
        {
            base.OnException(filterContext);
            //处理错误消息，将其跳转到一个页面
            LogHelper.WriteLog(filterContext.Exception.ToString());
            //页面跳转到错误页面
            filterContext.HttpContext.Response.Redirect("/Error.html");
        }
    }

还要建一个工具类，用来写日志。

 public class LogHelper
    {
        public static void WriteLog(string txt)
        {
            ILog log = LogManager.GetLogger("log4netlogger");
            log.Error(txt);

        }
    }

最后还要在

FilterConfig.cs中加入全局过滤器 //注册错误过滤器  public static void RegisterGlobalFilters(GlobalFilterCollection filters)        {            filters.Add(new HandleErrorAttribute());            //注册错误过滤器            filters.Add(new MyExceptionFileAttribute());        }默认把错误日志存在app_data中，为htm文件。存到mysql数据库中了数据库结构如图：