应用log4的步骤1,2(下载与App类)

1下载log4net

2在web下的app_code文件夹中添加App.css类

 

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using log4net;
using log4net.Config;

/// <summary>
///AppLog 的摘要说明
/// </summary>
public class AppLog
{
    /// <summary>
 /// 日志处理
 /// </summary
       
    private AppLog() { }
    private const string LOG_REPOSITORY = "Default"; // this should likely be set in the web config.
    private static ILog m_log;

    /// <summary>
    /// 初始化日志系统
    /// 在系统运行开始初始化
    /// Global.asax Application_Start内
    /// </summary>
    public static void Init()
    {
      
       log4net.Config.XmlConfigurator.Configure();

       
    }

    /// <summary>
    /// 写入日志
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="messageType">日志类型</param>
    public static void Write(string message, LogMessageType messageType)
    {
        DoLog(message, messageType, null, Type.GetType("System.Object"));
    }

    /// <summary>
    /// 写入日志
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="messageType">日志类型</param>
    /// <param name="type"></param>
    public static void Write(string message, LogMessageType messageType, Type type)
    {
        DoLog(message, messageType, null, type);
    }

    /// <summary>
    /// 写入日志
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="messageType">日志类型</param>
    /// <param name="ex">异常</param>
    public static void Write(string message, LogMessageType messageType, Exception ex)
    {
        DoLog(message, messageType, ex, Type.GetType("System.Object"));
    }

    /// <summary>
    /// 写入日志
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="messageType">日志类型</param>
    /// <param name="ex">异常</param>
    /// <param name="type"></param>
    public static void Write(string message, LogMessageType messageType, Exception ex,
                             Type type)
    {
        DoLog(message, messageType, ex, type);
    }

    /// <summary>
    /// 断言
    /// </summary>
    /// <param name="condition">条件</param>
    /// <param name="message">日志信息</param>
    public static void Assert(bool condition, string message)
    {
        Assert(condition, message, Type.GetType("System.Object"));
    }

    /// <summary>
    /// 断言
    /// </summary>
    /// <param name="condition">条件</param>
    /// <param name="message">日志信息</param>
    /// <param name="type">日志类型</param>
    public static void Assert(bool condition, string message, Type type)
    {
        if (condition == false)
            Write(message, LogMessageType.Info);
    }

    /// <summary>
    /// 保存日志
    /// </summary>
    /// <param name="message">日志信息</param>
    /// <param name="messageType">日志类型</param>
    /// <param name="ex">异常</param>
    /// <param name="type">日志类型</param>
    private static void DoLog(string message, LogMessageType messageType, Exception ex,
                              Type type)
    {
        m_log = LogManager.GetLogger(type);

        switch (messageType)
        {
            case LogMessageType.Debug:
                AppLog.m_log.Debug(message, ex);
                break;

            case LogMessageType.Info:
                AppLog.m_log.Info(message, ex);
                break;

            case LogMessageType.Warn:
                AppLog.m_log.Warn(message, ex);
                break;

            case LogMessageType.Error:
                AppLog.m_log.Error(message, ex);
                break;

            case LogMessageType.Fatal:
                AppLog.m_log.Fatal(message, ex);
                break;
        }
    }

    /// <summary>
    /// 日志类型
    /// </summary>
    public enum LogMessageType
    {
        /// <summary>
        /// 调试
        /// </summary>
        Debug,
        /// <summary>
        /// 信息
        /// </summary>
        Info,
        /// <summary>
        /// 警告
        /// </summary>
        Warn,
        /// <summary>
        /// 错误
        /// </summary>
        Error,
        /// <summary>
        /// 致命错误
        /// </summary>
        Fatal
    }
}