LogHelper

原文链接

public class LogHelper
    {

        static string strLogCOMPath = Directory.GetCurrentDirectory() + "\Log\" + DateTime.Now.ToString("yyyyMMdd") + "LogJH.txt";
        static string strLogErrorPath = Directory.GetCurrentDirectory() + "\Log\" + DateTime.Now.ToString("yyyyMMdd") + "ErrorLog.txt";
        /// <summary>
        /// 记录交互日志
        /// </summary>        
        /// <param name="strLogContent">要记录的内容</param>
        /// <param name="bWriteFirstLine">是否要添加第一行日志title</param>
        /// <param name="strConentTitle">title内容</param>
        public static void AddCOMLog(string strLogContent, bool bWriteFirstLine, string strConentTitle)
        {
            string time1;
            time1 = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff");
            if (!File.Exists(strLogCOMPath))
            {
                using (FileStream fs = new FileStream(strLogCOMPath, FileMode.Create, FileAccess.Write))
                {
                    if (bWriteFirstLine)
                    {
                        StringBuilder sb1 = new StringBuilder();
                        sb1.Append("时间").Append(",").Append(strConentTitle).Append(",").Append("
");
                        string str = sb1.ToString();
                        byte[] buffer = Encoding.Default.GetBytes(str);
                        fs.Write(buffer, 0, buffer.Length);
                    }
                }
            }
            using (StreamWriter sw = new StreamWriter(strLogCOMPath, true, Encoding.Default))
            {
                StringBuilder sb = new StringBuilder();
                sb.Append(time1).Append(",").Append(strLogContent).Append(",");
                sw.WriteLine(sb);
            }
        }
        /// <summary>
        /// 记录错误日志
        /// </summary>        
        /// <param name="strLogContent">要记录的内容</param>
        /// <param name="bWriteFirstLine">是否要添加第一行日志title</param>
        /// <param name="strConentTitle">title内容</param>
        public static void AddErrorLog(string strLogContent, bool bWriteFirstLine, string strConentTitle)
        {
            string time1;
            time1 = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff");
            if (!File.Exists(strLogErrorPath))
            {
                using (FileStream fs = new FileStream(strLogErrorPath, FileMode.Create, FileAccess.Write))
                {
                    if (bWriteFirstLine)
                    {
                        StringBuilder sb1 = new StringBuilder();
                        sb1.Append("时间").Append(",").Append(strConentTitle).Append(",").Append("
");
                        string str = sb1.ToString();
                        byte[] buffer = Encoding.Default.GetBytes(str);
                        fs.Write(buffer, 0, buffer.Length);
                    }
                }
            }
            using (StreamWriter sw = new StreamWriter(strLogErrorPath, true, Encoding.Default))
            {
                StringBuilder sb = new StringBuilder();
                sb.Append(time1).Append(",").Append(strLogContent).Append(",");
                sw.WriteLine(sb);
            }
        }

        static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("loginfo");
        static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror");
        static string isAddLog = System.Configuration.ConfigurationSettings.AppSettings.Get("isAddLog");
        /// <summary>
        /// 仅向日志中增加信息
        /// </summary>
        /// <param name="info"></param>
        public static void WriteLog(string info)
        {
            if (isAddLog == "0")
                return;
            if (loginfo.IsInfoEnabled)
            {
                loginfo.Info(info);
            }

        }
        /// <summary>
        /// 记录错误日志
        /// </summary>
        /// <param name="ex">错误异常</param>
        /// <param name="info">异常信息</param>
        public static void WriteLog(Exception ex, string info)
        {
            if (logerror.IsErrorEnabled)
            {
                logerror.Error(info, ex);
            }
        }
    }

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <log4net>
    <!--错误日志类-->
    <logger name="logerror">
      <!--日志类的名字-->
      <level value="ALL" />
      <!--定义记录的日志级别-->
      <appender-ref ref="ErrorAppender" />
      <!--记录到哪个介质中去-->
    </logger>
    <!--信息日志类-->
    <logger name="loginfo">
      <level value="ALL" />
      <appender-ref ref="InfoAppender" />
    </logger>
    <!--错误日志附加介质-->
    <appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
      <!-- name属性指定其名称,type则是log4net.Appender命名空间的一个类的名称,意思是,指定使用哪种介质-->
      <param name="File" value="Log\LogError\" />
      <!--日志输出到exe程序这个相对目录下-->
      <param name="AppendToFile" value="true" />
      <!--输出的日志不会覆盖以前的信息-->
      <param name="MaxSizeRollBackups" value="100" />
      <!--备份文件的个数-->
      <param name="MaxFileSize" value="10240" />
      <!--当个日志文件的最大大小-->
      <param name="StaticLogFileName" value="false" />
      <!--是否使用静态文件名-->
      <param name="DatePattern" value="yyyyMMdd&quot;.html&quot;" />
      <!--日志文件名-->
      <param name="RollingStyle" value="Date" />
      <!--文件创建的方式，这里是以Date方式创建-->
      <!--错误日志布局-->
      <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;"  />
      </layout>
    </appender>
    <!--信息日志附加介质-->
    <appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="Log\LogInfo\" />
      <param name="AppendToFile" value="true" />
      <param name="MaxFileSize" value="10240" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyyMMdd&quot;.html&quot;" />
      <param name="RollingStyle" value="Date" />
      <!--信息日志布局-->
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="&lt;HR COLOR=blue&gt;%n日志时间：%d [%t] &lt;BR&gt;%n日志级别：%-5p &lt;BR&gt;%n日 志 类：%c [%x] &lt;BR&gt;%n%m &lt;BR&gt;%n &lt;HR Size=1&gt;"  />
      </layout>
    </appender>
  </log4net>
</configuration>

引用添加Log4net.DLL。

捕捉异常后，调用WriteLog方法，记录日志。

             try
            {
                  代码块
            }
           catch (Exception ex)
            {
                LogHelper.WriteLog(ex, ex.Message.ToString());
            }

使用日志时，注意2点

1.目标框架不能使用Client Profile，否则无法找到Log4net.DLL。

2.在LogHelper的Project中Assembly程序集需要添加以下代码，否则无法写日志。

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", ConfigFileExtension = "config", Watch = true)]//让程序启动时是找到Log4net.config配置文件