【转】在ASP.Net中写系统日志

ASP.Net默认情况下，是没有写系统日志的权限的。要在ASP.Net中写系统日志，首先我们要先有其权限。我们可以通过设置或修改注册表的权限来解决。

方法1：“开始->运行”,输入命令，“regedt32”,找到“System->CurrentControlSet->Services->Eventlog”,选择“安全->权限->添加”，然后找到本机的“AspNet”用户，加进来并且给读取权限就好了，加进来后目录中会多一个“aspnet_wp account”

方法2：在注册表：HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Service\EventLog增加User的完全操纵权限

using System;
using System.Diagnostics;
using System.Text;

namespace CorePlus.Framework.Utility
{
 /// <summary>
 /// 写日志的CLASS
 /// </summary>
 public class LogUtility
 {
  public enum EVENT
  {
   /// <summary>重大错误</summary>
   EVENT_ERROR,
   /// <summary>操作失败</summary>
   EVENT_FAILUREAUDIT,
   /// <summary>一般信息</summary>
   EVENT_INFORMATION,
   /// <summary>有效的,成功的操作</summary>
   EVENT_SUCCESSAUDIT,
   /// <summary>警告</summary>
   EVENT_WARNING,
  }

  private static TextWriterTraceListener listner = null;

  /// <summary>
  /// 构造函数
  /// </summary>
  public LogUtility () {}

  /// <param name="loginID">登录ID</param>
  /// <param name="screenID">画面ID</param>
  /// <param name="level">警告级别</param>
  /// <param name="message">日志信息</param>
  public static void Logging (
   string loginID,
   string screenID,
   EVENT level,
   string message )
  {
   // 变量定义
   StringBuilder  outputMessage = null; // 输出的信息
   string    targetLevelString = null;
   EventLogEntryType Eventtype = new EventLogEntryType();

   switch (level)
   {
    case EVENT.EVENT_ERROR:
     Eventtype = EventLogEntryType.Error;
     break;

    case EVENT.EVENT_FAILUREAUDIT:
     Eventtype = EventLogEntryType.FailureAudit;
     break;

    case EVENT.EVENT_INFORMATION:
     Eventtype = EventLogEntryType.Information;
     break;

    case EVENT.EVENT_SUCCESSAUDIT:
     Eventtype = EventLogEntryType.SuccessAudit;
     break;

    case EVENT.EVENT_WARNING:
     Eventtype = EventLogEntryType.Warning;
     break;
   }

   // 日志信息的拼合
   outputMessage = MakeMessage( loginID, screenID, targetLevelString, message );

   // 写日志
   Logging( Eventtype, outputMessage.ToString() );
  }

  /// <summary>
  /// 向日志管理器写日志
  /// </summary>
  /// <param name="level">错误级别</param>
  /// <param name="message">输出的信息</param>
  private static void Logging ( EventLogEntryType level, string message )
  {
   // 变量定义
   string  logName  = null; // 日志名
   string  machineName = null; // 机器名
   string  sourceName = null; // SourceName
   EventLog eventLog = null; // EventLog

   logName  = "Eventlog2";  // 日志名
   machineName = "."; // 机器名
   sourceName = "Eventlog2"; // SourceName

   eventLog = new EventLog( logName, machineName, sourceName );
   eventLog.WriteEntry( message,level );
   eventLog = null;
  }

  /// <summary>
  /// 日志最终拼合
  /// </summary>
  /// <param name="loginID">登录ID</param>
  /// <param name="screenID">画面ID</param>
  /// <param name="levelString">错误级别</param>
  /// <param name="message">日志信息</param>
  /// <returns>输出的日志信息</returns>
  private static StringBuilder MakeMessage (
   string loginID,
   string screenID,
   string levelString,
   string message )
  {
   // 变量定义
   StringBuilder retMessage = new StringBuilder();

   retMessage.Append( "【登录ID】" );
   retMessage.Append( loginID );
   retMessage.Append( "\n【画面ID】" );
   retMessage.Append( screenID );
   retMessage.Append( "\n【错误级别】" );
   retMessage.Append( levelString );
   retMessage.Append( "\n【错误信息】\n" );
   retMessage.Append( message );

   return retMessage;
    }
  }
}

// 在FORM中输出日志
  private void button1_Click(object sender, System.EventArgs e)
  {
   LogUtility.Logging( "bbbbbb","22222222",LogUtility.EVENT.EVENT_ERROR,"3333333" );
  }

运行完程序后打开日志管理器看看~~~~~~~~~怎么样?不错吧,呵呵.

另一个方法

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;

namespace Log
{
    class LogWirter
    {
        /// <summary>
        /// 事件源名称
        /// </summary>
        private string eventSourceName;
        EventLogEntryType eventLogType;
        public LogWirter()
        {
            eventSourceName = "test";
            eventLogType = EventLogEntryType.Error;
        }

        /// <summary>
        /// 消息事件源名称
        /// </summary>
        public string EventSourceName
        {
            set { eventSourceName = value; }
        }

        /// <summary>
        /// 消息事件类型
        /// </summary>
        public EventLogEntryType EventLogType
        {
            set { eventLogType = value; }
        }

        /// <summary>
        /// 写入系统日志
        /// </summary>
        /// <param name="message">事件内容</param>
        public void LogEvent(string message)
        {
            if (!EventLog.SourceExists(eventSourceName))
            {
                EventLog.CreateEventSource(eventSourceName, "Application");
            }
            EventLog.WriteEntry(eventSourceName, message, EventLogEntryType.Error);
        }
    }
}