C# 利用log4net 把日志写入到数据库

效果图:

1：第一步创建SQL表结构

CREATE TABLE [dbo].[LogDetails] (
[LogID] int NOT NULL IDENTITY(1,1) ,
[LogDate] datetime NOT NULL ,
[LogThread] nvarchar(100) NOT NULL ,
[LogLevel] nvarchar(200) NOT NULL ,
[LogLogger] nvarchar(500) NOT NULL ,
[LogMessage] nvarchar(3000) NOT NULL ,
[LogActionClick] nvarchar(4000) NULL ,
[UserName] nvarchar(30) NULL ,
[UserIP] varchar(20) NULL 
)

2：创建项目然后下载log4net.dll 在项目中添加引用 http://logging.apache.org/log4net/download_log4net.cgi下载Binaries 下面的

3：创建 log4net.config

4：在Web.config 里面加 configSections 节点 (CS可直接写在app.config里面，或者都写在一个config里面)

5：Properties 属性下面的AssemblyInfo.cs 追加 必须有这个，否则写入不到数据库中

//[assembly: log4net.Config.XmlConfigurator(Watch = true)]
 //注意： ConfigFile 可以指定相对路径 和 绝对路径。 eg: /log/xxxx.log  或者 d://log//xxxx.log
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", ConfigFileExtension = "config", Watch = true)]

6：添加 Global.asax

然后在Application_Start 追加 读取配置程序文件

 protected void Application_Start(object sender, EventArgs e)
        {
            //应用程序启动时，自动加载配置log4Net  
            XmlConfigurator.Configure();  
        }

7：创建自定义类 LogPublicClass.cs，为了方便写入数据库中 自定义的一些信息

using log4net.Layout;
using log4net.Layout.Pattern;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;

namespace Log4NetApply
{
    /// 

    /// 包含了所有的自定字段属性
    /// 
    public class LogContent
    {
        public LogContent(string macAddress, string computerName, string actionsclick, string description)
        {
            UserIP = macAddress;
            UserName = computerName;
            ActionsClick = actionsclick;
            Message = description;
        }
   
        /// 

        /// 访问IP
        /// 
        public string UserIP { get; set; }

        /// 

        /// 系统登陆用户
        /// 
        public string UserName { get; set; }

        /// 

        /// 动作事件
        /// 
        public string ActionsClick { get; set; }

        /// 

        /// 日志描述信息
        /// 
        public string Message { get; set; }


    }
	public class MyLayout : PatternLayout
    {
         public MyLayout()
        {
            this.AddConverter("property", typeof(LogInfoPatternConverter));
         }
     }

    public class LogInfoPatternConverter : PatternLayoutConverter
    {

        protected override void Convert(System.IO.TextWriter writer, log4net.Core.LoggingEvent loggingEvent)
        {
            if (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());
            }
        }
        /// 

        /// 通过反射获取传入的日志对象的某个属性的值
        /// 
        /// 
        /// 

        private object LookupProperty(string property, log4net.Core.LoggingEvent loggingEvent)
        {
            object propertyValue = string.Empty;
            PropertyInfo propertyInfo = loggingEvent.MessageObject.GetType().GetProperty(property);
            if (propertyInfo != null)
                propertyValue = propertyInfo.GetValue(loggingEvent.MessageObject, null);
            return propertyValue;
        }
    }
}

8：示例使用

   try
                {
                    log.Info(new LogContent("127.0.0.1", "111111", "登陆系统", "登陆成功"));
                    var ss = 1 - int.Parse("sss");
                }
                catch(Exception ex)
                {
                    log.Error(new LogContent("127.0.0.1", "111111", "登陆系统", ex.Message+":"+ex.StackTrace));
                }

其他自行参考下列文章

http://www.cnblogs.com/kissazi2/p/3393151.html
http://blog.csdn.net/zdw_wym/article/details/48802821
http://blog.csdn.net/ydm19891101/article/details/50561638
http://www.w2bc.com/Article/70140
http://www.cnblogs.com/yuangang/archive/2016/05/16/5497140.html