C#创建日志通用类<包含log4net日志和特殊日志（年/月/日/文件名.log）>

public class LogerHelper
    {
        public LogerHelper()
        {
            SetConfig();
        }
        private static ILog loginfo = LogManager.GetLogger( "myLogger" );
        private static void SetConfig()
        {
            log4net.Config.XmlConfigurator.ConfigureAndWatch( new System.IO.FileInfo( "Configs/Log4net.xml" ) );
        }
 
        private static bool IsLoadConfig = false;
        /// <summary>
        /// 记录日志
        /// </summary>
        /// <param name="info">提示信息</param>
        public static void WriteLog( string info )
        {
            if (!IsLoadConfig)
            {
                SetConfig();
                IsLoadConfig = true;
            }
            if (loginfo.IsInfoEnabled)
            {
                loginfo.Info( info );
            }
        }
 
        /// <summary>
        /// 记录异常
        /// </summary>
        /// <param name="info">错误</param>
        /// <param name="ex">Exception</param>
        public static void WriteLog( string info, Exception ex )
        {
            if (!IsLoadConfig)
            {
                SetConfig();
                IsLoadConfig = true;
            }
            if (loginfo.IsErrorEnabled)
            {
                loginfo.Error( info, ex );
            }
        }
 
        /// <summary>
        /// 一天一个日志
        /// 生成方式：目录：Error/年/月/日/文件名.log
        /// </summary>
        /// <param name="message"></param>
        public static void LogToFile( string message )
        {
            try
            {
                DirectoryInfo dir;
                //修改记录日志为C盘根目录，并且注释判断当前程序目录内是否存在log日志文件夹
                if (!Directory.Exists( "Error" ))
                {
                    dir = Directory.CreateDirectory( "Error" );
                    dir.Create();
                }
                else
                {
                    if (!Directory.Exists( @"Error/" + DateTime.Today.Year.ToString() + "/" + DateTime.Today.Month.ToString() + "/" + DateTime.Today.Day.ToString() ))
                    {
                        Directory.CreateDirectory( @"Error/" + DateTime.Today.Year.ToString() + "/" + DateTime.Today.Month.ToString() + "/" + DateTime.Today.Day.ToString() );
                    }
                }
 
 
                using (StreamWriter writer = new StreamWriter( @"Error/" + DateTime.Today.Year.ToString() + "/" + DateTime.Today.Month.ToString() + "/" + DateTime.Today.Day.ToString() + "/更新的接警单编号.log", true ))
                {
                    try
                    {
                        writer.Write( "时间:\t" + DateTime.Now.ToString() + "\t \t \t \t" );
                        writer.WriteLine( message );
                        //writer.WriteLine( Environment.NewLine );
                        writer.Flush();
                        writer.Close();
                    }
                    catch (Exception exec)
                    {
                        WriteLog( "写入错误", exec );
                        writer.Dispose();
                    }
                }
            }
            catch (Exception ex)
            {
                WriteLog( "创建错误", ex );
            }
        }
    }
    //用的方法如下：
    LogerHelper.LogToFile( "创建日志"); 
    //这个将生成诸如这样的Error/年/月/日/文件名.log的日志LogerHelper.WriteLog("单独的日志");
    //这个将写入到Error/log.log文件夹下，只记录一个单独的infoLogerHelper.WriteLog("单独的日志",ex);
    //这个也将写入到Error/log.log文件夹下，记录单独的info，和一个异常信息//注意：此方法在winform里边是不用配置log4net的节点的，可以将附件中的log4net.xml放入到winform下的configs（若没有需要自己建立）下面，然后将这个xml的生成操作属性改为嵌入的资源 和 复制到输出目录改为：如果较新则复制<br><br><br>