少有人走的路勇哥注：
log4net通过配置文件，可以有自己的缓存机制，并且可以设置成支持多线程输出。
另外还有日志级别和日志轮换功能。
输出媒介可以指定文件、数据库等。文件类型可以为ini, log等。
在开发软件时，建议还是不要再使用File.Write自己来写磁盘记录log，这样多线程写log时磁盘效率会很感人，并且维护也复杂，还是全部交给开源的log4net吧。
下面是配置文件：
<?xml version="1.0" encoding="utf-8" ?> <configuration> <log4net> <!--数据日志--> <appender name="InfoRollingFileAppender" type="log4net.Appender.RollingFileAppender"> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> <param name="File" value="Log\Info\" /> <param name="AppendToFile" value="true" /> <param name="rollingStyle" value="Date" /> <param name="datePattern" value="yyyy-MM-dd.'Info.log'" /> <param name="staticLogFileName" value="false" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%n%n%n 记录时间：%date %n日志级别： %-5level %n出错类：%logger %n错误描述：%message %newline%newline" /> </layout> <filter type="log4net.Filter.LevelRangeFilter"> <param name="LevelMin" value="INFO" /> <param name="LevelMax" value="INFO" /> </filter> </appender> <!--错误日志--> <appender name="ErrorRollingFileAppender" type="log4net.Appender.RollingFileAppender"> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> <param name="File" value="Log\Error\" /> <param name="AppendToFile" value="true" /> <param name="rollingStyle" value="Date" /> <param name="datePattern" value="yyyy-MM-dd.'error.log'" /> <param name="staticLogFileName" value="false" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%n%n%n 记录时间：%date %n日志级别： %-5level %n出错类：%logger %n错误描述：%message %newline%newline" /> </layout> <filter type="log4net.Filter.LevelRangeFilter"> <param name="LevelMin" value="ERROR" /> <param name="LevelMax" value="ERROR" /> </filter> </appender> <!--调试日志--> <appender name="DebugRollingFileAppender" type="log4net.Appender.RollingFileAppender"> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> <param name="File" value="Log\Debug\" /> <param name="AppendToFile" value="true" /> <param name="rollingStyle" value="Date" /> <param name="datePattern" value="yyyy-MM-dd.'debug.log'" /> <param name="staticLogFileName" value="false" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%n%n%n 记录时间：%date %n日志级别： %-5level %n出错类：%logger %n错误描述：%message %newline%newline" /> </layout> <filter type="log4net.Filter.LevelRangeFilter"> <param name="LevelMin" value="DEBUG" /> <param name="LevelMax" value="DEBUG" /> </filter> </appender> <root> <level value="DEBUG" /> <!--文件形式记录日志--> <appender-ref ref="ErrorRollingFileAppender" /> <appender-ref ref="DebugRollingFileAppender" /> <appender-ref ref="InfoRollingFileAppender" /> </root> </log4net> </configuration>
下面是演示代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config",Watch = true)]
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Log.Debug("debug");
Log.Error("error");
Log.Info($"info111 {DateTime.Now.ToString()}");
Log.Warn("warn");
}
}
public class Log
{
/// <summary>
/// 一般错误
/// </summary>
/// <param name="message">消息</param>
public static void Error(object message)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Error(message);
}
catch
{
}
}
/// <summary>
/// 一般错误
/// </summary>
/// <param name="message">消息</param>
/// <param name="exception">异常</param>
public static void Error(object message, Exception exception)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Error(message, exception);
}
catch
{
}
}
/// <summary>
/// 信息
/// </summary>
/// <param name="message">消息</param>
public static void Info(object message)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Info(message);
}
catch
{
}
}
/// <summary>
/// 信息
/// </summary>
/// <param name="message">消息</param>
/// <param name="exception">异常</param>
public static void Info(object message, Exception ex)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Info(message, ex);
}
catch
{
}
}
/// <summary>
/// 警告
/// </summary>
/// <param name="message">消息</param>
public static void Warn(object message)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Warn(message);
}
catch
{
}
}
/// <summary>
/// 警告
/// </summary>
/// <param name="message">消息</param>
/// <param name="exception">异常</param>
public static void Warn(object message, Exception ex)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Warn(message, ex);
}
catch
{
}
}
/// <summary>
/// 调试
/// </summary>
/// <param name="message">消息</param>
public static void Debug(object message)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Debug(message);
}
catch
{
}
}
/// <summary>
/// 调试
/// </summary>
/// <param name="message">消息</param>
/// <param name="exception">异常</param>
public static void Debug(object message, Exception ex)
{
try
{
log4net.ILog log = log4net.LogManager.GetLogger(GetCurrentMethodFullName());
log.Debug(message, ex);
}
catch
{ }
}
/// <summary>
/// 获取执行的方法名称
/// </summary>
/// <returns></returns>
static string GetCurrentMethodFullName()
{
try
{
int depth = 2;
System.Diagnostics.StackTrace st = new System.Diagnostics.StackTrace();
int maxFrames = st.GetFrames().Length;
System.Diagnostics.StackFrame sf;
string methodName, className;
Type classType;
do
{
sf = st.GetFrame(depth++);
classType = sf.GetMethod().DeclaringType;
className = classType.ToString();
} while (className.EndsWith("Exception") && depth < maxFrames);
methodName = sf.GetMethod().Name;
return className + "." + methodName;
}
catch (Exception e)
{
log4net.LogManager.GetLogger("Core.Log").Error(e.Message, e);
return "获取方法名失败";
}
}
}
}输出的log见bin目录下：
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