.NET中 记录日志的比较好的主要是Log4Net和Enterprise Library的Logging

复杂一点的还可以实现自动化Log日志

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首先是第二种方式

1.需要添加以下几个DLL  

• Microsoft.Practices.EnterpriseLibrary.Logging.dll
• Microsoft.Practices.ObjectBuilder2.dll
• Microsoft.Practices.EnterpriseLibrary.Common.dll

2.Web.config 的configuration节点中添加以下内容

注意：configSections节点一定要在loggingConfiguration节点的上面

3.调用

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Diagnostics;using System.Reflection;using System.Configuration;using Microsoft.Practices.EnterpriseLibrary.Logging;using System.Collections;public sealed class LogWriter{    public LogWriter()    {    }    /// 
    /// 输出错误日志    /// 
    ///     public static void WriteError(Exception exception, string title)    {        LogEntry logEntity = new LogEntry();        logEntity.Title = title;        logEntity.TimeStamp = DateTime.Now;        logEntity.Message = exception.ToString();        logEntity.Severity = TraceEventType.Error;        Logger.Write(logEntity);    }}