public class Logs

{

private static Logger logger = LogManager.GetCurrentClassLogger(); //初始化日志类

/// <summary>

/// 日志状态枚举

/// </summary>

private enum LogState

{

/// <summary>

/// 用户已登录

/// </summary>

NLogin,

/// <summary>

/// 用户未登录

/// </summary>

YLogin,

}

/// <summary>

/// 静态构造函数

/// </summary>

static Logs()

{

//初始化配置日志

LogManager.Configuration = new XmlLoggingConfiguration(System.AppDomain.CurrentDomain.BaseDirectory.ToString() + "\\Demo\\NLog.config");

}

/// <summary>

/// 日志写入通用方法(建议使用)

/// </summary>

/// <param name="msg">日志内容</param>

/// <param name="logType"> 日志类别

/// 类别: 1.Debug

/// 2.Info

/// 3.Error

/// 4.Fatal

/// 5.Warn

/// </param>

/// <param name="loginState">登录状态 true:有用户登录信息 false 无用户登录信息</param>

/// <remarks>

/// 注：默认类型为Info 可以配置其他日志 logType用于反射 规则一定要准确

/// 例: 1.默认日志 LogWriter("test log"); 正常的业务日志

/// 2.异常日志 LogWriter("test log","Fatal"); try catch 里请使用这个日志级别

///

/// </remarks>

public static void LogWriter(String msg, String logType = "Info", bool loginState = true)

{

try

{

String logMethod = ""; //调用者类名和方法名

if (logType == "Fatal")

{

StackTrace trace = new StackTrace();

//获取是哪个类来调用的

String invokerType = trace.GetFrame(1).GetMethod().DeclaringType.Name;

//获取是类中的那个方法调用的

String invokerMethod = trace.GetFrame(1).GetMethod().Name;

logMethod = invokerType + "." + invokerMethod + " | ";

}

String IP = HttpContext.Current.Request.UserHostAddress; //获取IP

//反射执行日志方法

Type type = typeof(Logger);

MethodInfo method = type.GetMethod(logType, new Type[] { typeof(String) });

if (loginState == true)

{

//如果是登陆状态 可以记录用户的登陆信息 比如用户名,Id等

method.Invoke(logger, new object[] { logMethod + msg + " [ " + IP + " | " + LogState.NLogin + " ]" });

}

else

{

method.Invoke(logger, new object[] { logMethod + msg + " [ " + IP + " | " + LogState.NLogin + " ]" });

}

}

catch

{

//日志代码错误,直接记录日志

Fatal(msg);

Warn(msg);

}

}

/// <summary>

/// 调试日志

/// </summary>

/// <param name="msg">日志内容</param>

private static void Debug(String msg)

{

logger.Debug(msg);

}

/// <summary>

/// 信息日志

/// </summary>

/// <param name="msg">日志内容</param>

/// <remarks>

/// 适用大部分场景

/// 1.记录日志文件

/// </remarks>

private static void Info(String msg)

{

logger.Info(msg);

}

/// <summary>

/// 错误日志

/// </summary>

/// <param name="msg">日志内容</param>

/// <remarks>

/// 适用异常,错误日志记录

/// 1.记录日志文件

/// </remarks>

private static void Error(String msg)

{

logger.Error(msg);

}

/// <summary>

/// 严重致命错误日志

/// </summary>

/// <param name="msg">日志内容</param>

/// <remarks>

/// 1.记录日志文件

/// 2.控制台输出

/// </remarks>

private static void Fatal(String msg)

{

logger.Fatal(msg);

}

/// <summary>

/// 警告日志

/// </summary>

/// <param name="msg">日志内容</param>

/// <remarks>

/// 1.记录日志文件

/// 2.发送日志邮件

/// </remarks>

private static void Warn(String msg)

{

try

{

logger.Warn(msg);

}

catch { }

}

}

web项目下面添加一个Demo文件夹创建Nlog.Config

<?xml version="1.0" encoding="utf-8" ?>

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" throwExceptions="true">

<targets xsi:type="AsyncWrapper">

<!--保存至文件-->

<target name="log_file" xsi:type="File"

fileName="${basedir}/Logs/${shortdate}/${level:uppercase=false:padding=-5}.txt"

layout="${longdate} | ${message} ${onexception:${exception:format=tostring} ${newline} ${stacktrace} ${newline}" />

<!--输出至Debugger-->

<target name="debugger" xsi:type="Debugger"

layout="NLog: ${date:format=HH\:mm\:ss} | ${message}" />

<!--输出至控制台-->

<target name="console" xsi:type="ColoredConsole" layout="${longdate} ${message} ${exception:format=tostring}"></target>

<!--输出至邮件-->

<target xsi:type="Mail" name="infoMail"

smtpServer="smtp.163.com"

smtpPort="25"

smtpAuthentication="Basic"

smtpUserName="deno@163.com"

smtpPassword="demo"

enableSsl="true"

addNewLines="true"

from="demo@163.com"

to="demo@qq.com"

subject="Project Exception Mail"

header="*********************"

body="${longdate} | ${message} "

footer="*********************"/>

</targets>

<rules>

<logger name="*" level="Info" writeTo="log_file" />

<logger name="*" levels="Error" writeTo="log_file" />

<logger name="*" levels="Debug" writeTo="log_file" />

<!--<logger name="*" level="Debug" writeTo="debugger" />-->

<!--<logger name="*" level="Fatal" writeTo="console" />-->

<logger name="*" level="Fatal" writeTo="log_file" />

<!--<logger name="*" level="Warn" writeTo="infoMail" />-->

<logger name="*" level="Warn" writeTo="log_file" />

</rules>

</nlog>